Gas sensing

Casella’s VAPex Sampling Pump wins New Product of the Year award

Casella, air sampling, noise and vibration specialist, has won Occupational Health and Safety’s 2019 ‘New Product of the Year Award’ for its VAPex Personal Low Flow Sampling Pump.

Casella’s VAPex Personal Low Flow Sampling Pump was selected as the best new product in the Industrial Hygiene: Air Sampling category by a panel of three highly qualified judges.

Tim Turney, Global Marketing Manager at Casella, said “We’re thrilled that the VAPex has been recognised among this year’s best products by a publication as well regarded as Occupational Health & Safety. We’re proud that the user-focused features of the VAPex have put it ahead of other air samplers, following in the footsteps of our other award-winning products.”

The 11th edition of the annual awards program was highly competitive, as Occupational Health and Safety (OH&S) editor Sydny Shepard, explains: “OH&S’ ‘New Product of the Year Award’ saw an outstanding number of entries for 2019, proving that industry manufacturers are dedicated to producing products that optimise worker safety.”

To find out more about Casella’s full range of monitoring and sampling solutions, visit www.casellasolutions.com/uk/en.html

Ready for Lead-free Gas Sensors?

All gas sensor users should be aware of the changes covered by the Restrictions on the Use of Hazardous Substances (ROHS) Directive (2011/65/EU), which covers the restrictions of six highly toxic materials (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE)) in electrical equipment.

Shawcity Ltd is an EMEA strategic channel partner for City Technology, one of the world’s leading manufacturers in gas sensing technology. City Technology gas sensors come under three categories:

Cat 8: Medical devices (all MOX sensors) – Came into scope 22 July 2014.
Cat 9: Monitoring and Control devices (Ecosure sensors) – Came into scope 22 July 2014.
Cat 9: Industrial monitoring and control devices (all other City Technology sensors) – Came into scope 22 July 2017.

The only exemption which applies to these sensors is the use of lead anodes in electrochemical oxygen sensors. This exemption is valid for seven years from the dates listed above.

For any gas sensor users, this means that all instruments using O2 electrochemical sensors which use an electrolyte containing lead or with a lead anode will no longer meet the ROHS requirements once the seven-year deadline of July 2024 is reached.

Lead-free 4OxLL and 5OxLL Oxygen Sensors

We offer two long-life oxygen sensor formats which are designed to work in an analyser for seven years, the entire life of the instrument. Available in 4 and 5 series formats, they offer an enhanced response time in extreme conditions.

Based on “electrochemical pump” technology, the design avoids using a consumable anode (lead), so removing the life-limiting component of many sensors. This technology significantly reduces the cost of ownership and the occurrence of field failure, helping manufacturers reduce their servicing costs as well as achieving ROHS compliance ahead of the deadline.

In terms of performance, the lead-free sensors offer fast response and recovery times with T90 <15sec, as well as an O2 offset <0.3%. They are also highly stable, with a <5% signal loss over lifetime.

With over 300 high performance sensor products detecting 28 common and exotic gases, Shawcity’s range includes 3, 4, 5 and 7 Series, MICROcel, MICROpel and Sensoric sensors. With our high-performance sensors used across various applications, we work closely with businesses and organisations operating in fields as diverse as medical, metal processing, chemical, automotive, agriculture, pharmaceutical, textiles, water & waste water treatment, mining, pulp & paper processing, gas detection/monitoring manufacturers, petrochemical, utilities and R&D institutes, including leading universities.

Our range offers detection for the following gases:

Ammonia, Arsine, Carbon Dioxide, Carbon Monoxide, Chlorine, Chlorine Dioxide, Diborane, Ethylene Oxide, Fluorine, Hydrazine, Hydrogen, Hydrogen Bromide, Hydrogen Chloride, Hydrogen Cyanide, Hydrogen Fluoride, Hydrogen Selenide, Hydrogen Sulphide, Mercaptan, Nitric Oxide, Nitrogen Dioxide, Oxygen, Ozone, Phosgene, Phosphine, Silane, Sulphur Dioxide, Tetrahydrothiophene, Combustibles, Exhaust Gases and General Air Quality.

Shawcity’s customer base stretches across the entire EMEA region catering for companies of all sizes and specialisms. We understand requirements within the industry and offer:

  • Advice for R&D and start-up projects
  • One-offs and sample sensor orders
  • Account support for quantity breaks
  • A range of stock available for immediate dispatch.

At Sensors & Instrumentation 2019 we will be showcasing City Technology’s latest long-life oxygen and carbon monoxide sensors on Stand 57, as part of our extensive range. Visit our team on the stand for advice on lead-free O2 sensors or any other sensor information.

solutions@shawcity.co.uk

01367 899420

www.shawcity.co.uk/sensorrange.

Ion Science on target to achieve £20 million turnover in 30th anniversary year

In line with its 30 per cent year-on-year growth objective, Cambridge-based Ion Science is celebrating 30 years by announcing it is on target to achieve £20 million turnover in 2019. Increasing global awareness of the need to monitor volatile organic compounds (VOCs) for indoor and outdoor air quality continues to drive demand for the company’s high performance photoionisation detectors (PIDs).

Ion Science’s managing director Duncan Johns

Further underlining its position as the world’s largest manufacturer of VOC monitors, Ion Science, which has subsidiary offices in France, Italy, Germany, India, China and the USA, is also reporting that April 2019 was a record month for the business with an unprecedented £1.3 million turnover, largely due to an order for 180 of its popular Tiger handheld instruments.  The company has also benefitted from sales growth across Scandanavia and the Far East.

“There is no doubt that widening recognition of the damaging effects of VOCs on health and the environment continues to fuel our growth,” comments Ion Science Managing Director, Duncan Johns. “It means that more companies are seeking well-designed, robust and reliable gas detection instruments for ensuring the safety of employees and the wider community.

“As a technology led business, it is imperative we continue to move forward and push boundaries, which has been demonstrated by considerable investment in strategically located subsidiary offices in Europe and the Rest-of-the-World, as well as the expansion of our MiniPID sensor range, with a focus on indoor air quality applications.

“Despite being established for 30 years, we are proud that our philosophies, core values and vision are the same as ever, that we are committed to developing market leading, cost effective and efficient sensing devices for end users across the world.”

Ion Science was responsible for developing the world’s first truly field worthy and accurate PID detector which was patented in 1998. In 2000, it launched the PhoCheck 5000EX which was its first PID instrument designed to detect VOCs down to ppb levels and the range of hydrosteel corrosion monitors that continue to be the world’s premium hydrogen flux monitors used primarily in petrochemical streams.

Responding to its growing experience of worldwide PID applications, the company took out a global patent on its advanced PID Fence Electrode technology in 2002, which enabled VOC measurement in contaminated, hot and humid atmospheres.

The serviceability and robustness of the PID using the Fence Electrode was enhanced by the in-house manufacture of a miniaturised PID (MiniPID), as incorporated in the Tiger series and other PID instruments.

In 2007, Ion Science acquired a mercury vapour detector (MVI) which is ideally suited to chemical and petrochemical markets.

Since then, the company has dedicated considerable resources to selective PID measurements within the petrochemical industries, such as the Tiger Select.

Another key milestone for Ion Science was the move into a new state-of-the-art £4.5 million, 1500m² facility in autumn 2017. Located in the village of Fowlmere in Cambridgeshire, the head office building was designed to meet current and short-term needs, as well as reflect the on-going ambitions of the business.

The role of gas sensing as a drinking water purification method

The processing of clean and safe drinking water and drinking water purification methods are an international issue. Estimates suggest that, if no further improvements are made to the availability of safe water sources, over 135 million people will die from potentially preventable diseases by 2020.

Even within the UK, water purification and treatment is big business, with £2.1 billion being invested by utilities in England and Wales between 2013 and 2014. Water purification consists of removing undesirable chemicals, bacteria, solids and gases from water, so that it is safe to drink and use. The standard of purified water varies depending on the intended purpose of the water, for example, water used for fine chemical synthesis may need to be ‘cleaner’ i.e. have fewer chemicals present, than is tolerable for drinking water, the most common use of purified water.

Water Purification Method

Water purification methods involve many different steps. The first step, once the water has been piped to the purification plant, is filtering to remove any large debris and solids.  There also needs to be an assessment of how dirty the water is to design the purification strategy. Some pretreatment may also occur using carbon dioxide to change pH levels and clean up the wastewater to some extent. Here, gas monitors are used to ensure the correct gas levels are being added to the water and unsafe levels of the gas do not build up.

The following steps include chemical treatment, an filtration to remove dissolved ionic compounds. Then, disinfection can occur to kill any remaining bacteria or viruses, with additional chemicals being added to provide longer lasting protection. At all stages, the water quality must be constantly monitored. This is to ensure that any pollutants have been adequately removed and the water is safe for its intended purpose.

In-line gas monitors are often used as part of the water treatment process as a way of monitoring total organic carbon (TOC) content. Carbon content in water can arise from a variety of sources, including bacteria, plastics or sediments that have not been successfully removed by the filtration process. TOC is a useful proxy for water cleanliness as it covers contamination from a variety of different sources.

To use non-dispersive infrared (NDIR) gas monitors to analyse the TOC content of water, a few extra chemical reactions and vaporisation need to be performed to cause the release of CO2­ gas. The resulting concentration of gas can then be used as a proxy of TOC levels. This then provides a metric than can be used to determine whether additional purification is required or that the water is safe for use.

Need for Gas Monitors in the Water Purification Process

NDIR gas sensors can be used as both a safety device in the water purification process as carbon dioxide, methane, and carbon monoxide are some of the key gases produced during the treatment process.  The other key use is for analysis of TOC content as a way of checking for water purity. NDIR sensors are particularly well suited for TOC analysis as carbon dioxide absorbs infrared light very strongly. This means that even very low carbon dioxide concentrations can be detected easily, making it a highly sensitive measurement approach. Other hydrocarbon gases can also easily be detected in this way, making NDIR sensors a highly flexible, adaptable approach to monitoring TOC and dissolved gas content in water.

Sensor Solutions

The need for constant gas monitoring to guide and refine the purification process during wastewater treatment means water purification plants need permanent, easy to install sensors that are capable of continual online monitoring. One of the most effective ways of doing this is having OEM sensors that can be integrated into existing water testing equipment to also provide information on water purity.

These reasons are why Edinburgh Sensors range of nondispersive infrared (NDIR) gas sensors are the perfect solution for water purification plants. NDIR sensors are highly robust with excellent sensitivity and accuracy across a range of gas concentrations. Two of the sensors they offer, the Gascard NG and the Guardian NG ­­­­are suitable for detecting carbon monoxide, carbon dioxide or other hydrocarbon gases. If just carbon dioxide is of interest, then Edinburgh Sensors offers are more extensive range of monitors, including the Gascheck and the IRgaskiT.

The advantage of NDIR detection for these gases are the device initial warm-up times are less than 1 minute, in the case of the Guardian NG. It is also capable of 0 – 100 % measurements such gases with a response time of less than 30 seconds from the sample inlet. The readout is ± 2 % accurate and all these sensors maintain this accuracy over even challenging environmental conditions of 0 – 95 % humidity, with self-compensating readout.

The Guardian NG comes with its own readout and menu display for ease of use and simply requires a reference gas and power supply to get running. For water purification purposes, the Gascard is particularly popular as the card-based device is easy to integrate into existing water testing equipment so testing of gases can occur while checking purity.

Edinburgh Sensors also offers custom gas sensing solutions and their full technical support throughout the sales, installation and maintenance process.

Gas Sensors for Water Purification

Edinburgh Sensors has a range of Gas Sensors suitable for the water purification process. View our range of gas sensors and for further information please contact us. We would be delighted to be of assistance.

Ninewells Hospital chooses ION Science Tiger VOC detector for use within assisted conception unit

The Assisted Conception Unit at Ninewells Hospital in Dundee has purchased an ION Science Tiger handheld volatile organic compound (VOC) detector in adherence with the Human Fertilisation and Embryology (HFEA) regulations for air quality in tissue laboratories and to ensure optimum culture conditions for embryos. This follows an independent external review that recommended the facility upgrade to a more sensitive photoionisation detector (PID) that measured VOC levels in parts per billion (ppb).

Established in 1984, the Assisted Conception Unit at Ninewells Hospital is one of the oldest IVF facilities in the UK. It performs numerous investigations to ascertain why couples are not getting pregnant naturally and try to overcome fertility issues to achieve a pregnancy. Every year it has an average of 400 cycles of IVF and ICSI, and a further 250 cycles utilising previously frozen embryos.

With even low levels of VOCs potentially affecting embryo development, the Ninewells Hospital’s Assisted Conception Unit regularly monitors VOCs in its laboratories to minimise contaminants, maintain the best possible conditions and help ensure successful IVF outcomes.

In the UK, assisted reproduction is regulated and governed by the Human Fertilisation and Embryology Authority (HFEA). Philip Milne from the Assisted Conception Unit at Ninewells Hospital explains: “The aim of the HFEA regulation is to implement standards of air quality in laboratories where tissues are prepared for use in humans, including assisted conception facilities. Part of this is measuring and maintaining the air found in tissue laboratories with particle and microbial counts being done on a regular basis.”

Human embryos are very sensitive to the environment and although the incubators offer a relatively clean area for culture, sperm, eggs and embryos have to be handled and processed within the laboratory, exposing them to harmful VOCs which can impact embryo development. Whilst most Assisted Conception Units will have air purification technology or HEPA filters, these do not eliminate VOCs.

As a result, the Assisted Conception Unit uses a PID to monitor VOC levels within its laboratory. However, the facility’s previous VOC instrument measured in parts per million (ppm) but an independent external review recommended it was replaced with a more sensitive ppb instrument like the ION Science Tiger which is able to detect very low levels of VOCs.

Offering a robust and reliable design, the well proven ION Science Tiger boasts a market leading measurement range of 1 ppb to 20,000 ppm. It is easy to set up and provides advanced VOC detection and software features. It also provides a response time of just two seconds and can be connected directly to a PC via the USB offering rapid data download capabilities.

Like all ION Science instruments, the Tiger incorporates the company’s latest MiniPID sensor and patented fence electrode technology for increased resistance to humidity and contamination.

Philip continues: “We needed a cost effective VOC instrument that was accurate, repeatable and user-friendly as our older one was cumbersome and difficult to use. The ION Science Tiger, purchased from Shawcity, fitted our ergonomic requirement whilst providing an affordable and reliable replacement.

“Regular monitoring of our laboratory’s air quality with the ION Science Tiger has shown very low levels of VOCs. With major building work taking place outside the air intakes from our laboratory, the use of the instrument is even more critical to maintaining those levels.

“We have been very pleased with the ION Science Tiger to date and would not hesitate to recommend it to other facilities,” he concludes.

Gas monitoring in frozen and dried food storage

There are many different approaches to food preservation for extending the lifetimes of perishable goods. From pickling, salting, canning or jellying, all of these approaches have different effects on the properties of the preserved produce and are suitable for different types of food. Two of the most widely used methods for food preservation are freezing and dried food storage.

The low temperatures involved in freezing food kill and prevent the growth of bacteria and other microorganisms and help to reduce nutrient loss. Drying foods, on the other hand, achieve bacterial growth inhibition by removing moisture from the food and slows down the enzyme activity alongside this.

As well as the atmospheric conditions during the freezing or drying process being important for maximizing the quality of the produce, the relative ratios of different atmospheric gases and humidity is also crucial during the storage of preserved foods. For dried products such as flour or cereals, ‘modified atmospheric conditions’, or storage of the food in specific, controlled mixture of gases, can extend shelf life by up to three times by inhibiting chemical reactions that lead to degradation and spoilage.

Modified Atmospheres

Modified atmospheric conditions are now commonplace in the packaging, storage, and transport of all kinds of food products, from fresh to frozen produce. High carbon dioxide and reduced oxygen levels can be beneficial for killing invasive insect species or microorganisms that would otherwise grow on and spoil the food as it was stored. High nitrogen concentrations can be used as a humidity control for keeping dried foods as it can help preserve food quality while extending food lifetimes.

By using gas mixtures to replace insecticides and the addition of preservatives such as nitrites to meats, modified atmospheric package, and controlled atmosphere storage offer a versatile and effective way to preserve foods without the need to add additional chemicals or processing stages.

The main gases of interest for modified atmosphere storage are carbon dioxide, oxygen, and nitrogen. However, controlling and maintaining the concentrations of these gases, particularly for dried food storage can be challenging. Optimum conditions often require very precise levels of control, with gas concentration ranges needing to be within 1 % of a given value. The other challenge for foods such as cereals is that they continue to produce and release gases such as carbon dioxide and carbon monoxide so the atmospheric conditions require constant adjustment. Monitoring gas levels is advantageous not just for maintaining optimum storage conditions, but also as increased carbon dioxide production can be an early indicator of food spoilage.

Frozen and Dried Food Storage

Gas monitoring for frozen and dried food comes with a particular set of challenges. Often, the freezing process is performed using carbon dioxide as a cryogen. The carbon dioxide is normally used in its solid form, known as ‘dry ice’, which has a temperature of – 79◦C. This allows rapid cooling of the food to help reduce risk of contamination and preserve food quality.

However, the National Institute for Occupational Health and Safety indicating that CO2 levels of 40 000 ppm (4%) are immediately dangerous to life and health with 10-hour workplace exposure limits being set at much lower limits. Foods may also be kept in similar cryogenic conditions during transportation and before use to reduce food wastage so reliable gas monitoring during the freezing and storage process is an essential part of health and safety.

For dried foods, even dried fruits produce not insignificant levels of carbon dioxide over time so for storage of large volumes of dried fruits, such as in grain barges, carbon dioxide monitoring is key for both food preservation and worker safety.

Gas Detection

For frozen and dried food storage, real-time gas monitoring and logging can help prevent unnecessary wastage while keeping produce in its optimal conditions. To achieve this requires gas detectors capable of constant, online analysis and with rapid response times and good accuracy.

Edinburgh Sensors are one of the market leaders in the development and production of non-dispersive infrared sensors (NDIR). As many hydrocarbon gases and molecules like carbon dioxide absorb infrared light very efficiently, NDIR sensors offer a very sensitive approach to detecting even small concentrations of such molecules.

Some of the NDIR sensors offered by Edinburgh Sensors include the Gascard, the Guardian NG, and the GasCheck. All of these devices have minimal need for recalibration and long device lifetimes and are capable of self-correcting measurements over a range of humidity conditions (0 – 95 %) ensuring they always achieve the best accuracy and reliability.

All of Edinburgh Sensors’s products can be interfaced with networking data logging systems or more complex control software if setting up feedback systems to maintain active control over modified atmospheric conditions is desirable. In the case of the Gascard, this can be done with on-board R323 connections but the Boxed Gascard version of this instrument can also be quickly connected via USB for immediate use.

With accuracies for carbon dioxide monitoring typically in the ± 2 % range, Edinburgh Sensors has a variety of solutions for gas monitoring even in challenging environmental conditions and offer full pre- and post-purchase technical sales advice.

Al Masaood relies on the BM25 multi-gas detector

The BM25 from Oldham-Simtronics, part of 3M Gas & Flame Detection, is a rugged multi-gas area monitor designed to ensure safety in hazardous environments.Testimony to this fact can be provided by Al Masaood Oil & Gas, which following its formation in 1971, became one of the first oil and gas suppliers and contractors in the United Arab Emirates (UAE). Al Masaood has supplied around 800 BM25 portable gas detectors into a host of onshore and offshore projects, including 200 of the latest-generation wireless models. The company acquires the units directly from Oldham-Simtronics.

“We selected the BM25 because we can trust and depend on its performance in the harsh environments in which we operate,” states Ammar Maarouf, Department Manager, Airloop & H2S Safety Services, Al Masaood Oil & Gas. “The BM25´s robust construction and intelligent design make it one of the best detectors to be deployed in applications where area monitoring is a critical part of the safety system.”

The BM25 was designed for team protection or area surveillance, and is ideally suited to perimeter monitoring, rig overhauls, and mobile or short-term work where fixed detection systems are not practical. Providing the capability to monitor one-to-five gases simultaneously, the BM25 packs the benefits of a fixed area monitor into a rugged, user-friendly and transportable instrument; a factor that has long-appealed to Al Masaood.

Around 10 years after the introduction of the first-generation BM25, the monitor continues to be the tried and trusted go-to solution within the transportable gas detection market.

With over 900 employees, Abu Dhabi-based Al Masaood Oil & Gas provides advanced energy services into upstream and downstream operations. Its Air Loop & H2S Safety business unit also supplies, calibrates and services various application-specific products across the UAE, including portable gas monitors, for both sales-based and rental-based projects.

“Provide us with a challenge and we’ll find the right solution,» says Mr Maarouf. »Portable gas detection and area monitoring has been a key competency for many years, and here we rely on various solutions from 3M Gas & Flame Detection, including the PS200 multi-gas detector, as well as the BM25.”

Up to five gases can be monitored simultaneously using the BM25; interchangeable sensors are available for AsH3, CO, CO2, H2, HCl, HCN, NO2, NH3, O2, PH3, SiH4 and SO2. When the BM25 detects a hazardous level of gas, the top-mounted beacon sends a flashing, bright signal in all directions while emitting a powerful, 103dB siren alarm.

“The standard BM25 can send alarms via alarm transfer cables, however, the latest-generation BM25 Wireless sends alarms, faults and readings using a 2.4GHz wireless signal,” explains Mr Maarouf. “This set-up can create a safety perimeter around a detected atmospheric hazard, or transmit a manually initiated emergency signal over a wide area.”

Powered by a NiMH battery pack, the BM25 multi-gas monitor offers up to 170 hours of continuous run time. Other standard features include STEL (short-term exposure limit) and TWA (time-weighted average) values, as well as a data-logging capacity of more than four months.

The BM25 Wireless provides networking and communication to the Oldham-Simtronics MX40 controller, which centralises the data and can display up to 32 measurements in real time. When a BM25 signals an alarm, the MX40 also goes into alarm mode and can, for example, control internal relays and order other monitors to transmit the alarm as well. The control panel displays real-time gas concentrations, field device status, battery levels, network RF signal quality and fault diagnostic conditions.

“To date we’ve supplied around 200 BM25 Wireless gas detectors,” says Mr Maarouf. “In fact, I think we were the first in our region to offer them. Our customers love the simplicity and the speed in which they can be deployed to keep workers safe.”

The Oldham-Simtronics BM25 Wireless can be used as a stand-alone monitor or linked into a mesh network to provide gas detection over a large area. The mesh network allows peer-to-peer connection with all other units in the network to send, receive and relay data. As a result, detectors can communicate around obstructions and alter communication paths should a monitor be removed for recharging or servicing. A total of 30 BM25 Wireless units may be meshed together in a single network, while up to 16 independent networks can co-exist without interference.

“We have used the BM25 and BM25 Wireless for so many years because they offer five-gas capability and are compact and extremely reliable in comparison with competitor units,” states Mr Maarouf. “We also like the excellent connectivity of the BM25 Wireless unit, which offers added-value for our clients as there is no need to use transfer cables for the alarm. A good stock of detectors is maintained at Al Masaood so that we can respond quickly to customer requirements.”

With 14,000 units in operation worldwide, BM25 multi-gas detectors are technologically capable and highly proven devices. This latter point is particularly important in safety-critical oil and gas applications, where any failure to detect dangerous gases could have disastrous consequences.

I2C Digital Pressure Sensors for Water and Gas Network Monitoring

The LD Series is the smallest fully functional OEM I2C digital transmitter for pressure and temperature measurement by KELLER.

The LD Series is the market leading sensor for gas and water pressure monitoring. These sensors have an accomplished real-life total error band of ±1.2mbar and resolution of 0.7mbar over -20°C… 70°C (100mbar sensor).

This performance enables Equipment Manufacturers to measure pressure data more accurately improving the quality and reliability of information to minimise gas/water leakage, ultimately reducing costs for utility companies.

All the electronic components are contained within the oil filled housing making the sensors easy for system integration. The I2C interface allows for multiple sensor monitoring and simple plug and play technology.

  • Pressure ranges from 0.1… 1000 bar
  • Operating temperature range from -40… 110°C
  • Fully factory compensated
  • Low power consumption of 1.8… 3.6VDC
  • Ultra-compact, robust housing made from stainless steel (optional Hastelloy C-276)
  • Extremely accurate, outstanding long-term stability, no hysteresis
  • Intrinsically safe option

Find more details at http://www.keller-druck.com/home_e/paprod_e/4ld_e.asp

“Probably the world’s smallest pressure transmitters; with their I2C interface, these are excellent for simple integration in microcontroller­based systems. The low-power optimised design lends itself well to battery operated devices.”

 

Ready for Lead-free Gas Sensors?

All gas sensor users should be aware of the changes covered by the Restrictions on the Use of Hazardous Substances (ROHS) Directive (2011/65/EU), which covers the restrictions of six highly toxic materials (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE)) in electrical equipment.
Shawcity Ltd is an EMEA strategic channel partner for City Technology, one of the world’s leading manufacturers in gas sensing technology. City Technology gas sensors come under three categories:
Cat 8: Medical devices (all MOX sensors) – Came into scope 22 July 2014.
Cat 9: Monitoring and Control devices (Ecosure sensors) – Came into scope 22 July 2014.
Cat 9: Industrial monitoring and control devices (all other City Technology sensors) – Came into scope 22 July 2017.
The only exemption which applies to these sensors is the use of lead anodes in electrochemical oxygen sensors. This exemption is valid for seven years from the dates listed above.
For any gas sensor users, this means that all instruments using O2 electrochemical sensors which use an electrolyte containing lead or with a lead anode will no longer meet the ROHS requirements once the seven-year deadline of July 2024 is reached.
Lead-free 4OxLL and 5OxLL Oxygen Sensors
We offer two long-life oxygen sensor formats which are designed to work in an analyser for seven years, the entire life of the instrument. Available in 4 and 5 series formats, they offer an enhanced response time in extreme conditions.

Based on “electrochemical pump” technology, the design avoids using a consumable anode (lead), so removing the life-limiting component of many sensors. This technology significantly reduces the cost of ownership and the occurrence of field failure, helping manufacturers reduce their servicing costs as well as achieving ROHS compliance ahead of the deadline.

In terms of performance, the lead-free sensors offer fast response and recovery times with T90 <15sec, as well as an O2 offset <0.3%. They are also highly stable, with a <5% signal loss over lifetime.
With over 300 high performance sensor products detecting 28 common and exotic gases, Shawcity’s range includes 3, 4, 5 and 7 Series, MICROcel, MICROpel and Sensoric sensors. With our high-performance sensors used across various applications, we work closely with businesses and organisations operating in fields as diverse as medical, metal processing, chemical, automotive, agriculture, pharmaceutical, textiles, water & waste water treatment, mining, pulp & paper processing, gas detection/monitoring manufacturers, petrochemical, utilities and R&D institutes, including leading universities.
Our range offers detection for the following gases:
Ammonia, Arsine, Carbon Dioxide, Carbon Monoxide, Chlorine, Chlorine Dioxide, Diborane, Ethylene Oxide, Fluorine, Hydrazine, Hydrogen, Hydrogen Bromide, Hydrogen Chloride, Hydrogen Cyanide, Hydrogen Fluoride, Hydrogen Selenide, Hydrogen Sulphide, Mercaptan, Nitric Oxide, Nitrogen Dioxide, Oxygen, Ozone, Phosgene, Phosphine, Silane, Sulphur Dioxide, Tetrahydrothiophene, Combustibles, Exhaust Gases and General Air Quality.
Shawcity’s customer base stretches across the entire EMEA region catering for companies of all sizes and specialisms. We understand requirements within the industry and offer:
– Advice for R&D and start-up projects
– One-offs and sample sensor orders
– Account support for quantity breaks
– A range of stock available for immediate dispatch.
At Sensors & Instrumentation 2019 we will be showcasing City Technology’s latest long-life oxygen and carbon monoxide sensors on Stand 11, as part of our extensive range. Visit our team on the stand for advice on lead-free O2 sensors or any other sensor information.

solutions@shawcity.co.uk
01367 899420
www.shawcity.co.uk/sensorrange

Shawcity Ltd is an EMEA strategic channel partner for City Technology (incorporating Sensoric GmbH), one of the world’s leading manufacturers in gas sensing technology

With over 300 high performance sensor products detecting 28 common and exotic gases, our range includes 3, 4, 5 and 7 Series, MICROcel, MICROpel and Sensoric sensors.

With our high-performance sensors used across various applications, we work closely with businesses and organisations operating in fields as diverse as medical, metal processing, chemical, automotive, agriculture, pharmaceutical, textiles, water & waste water treatment, mining, pulp & paper processing, gas detection/monitoring manufacturers, petrochemical, utilities and R&D institutes, including leading universities.

Shawcity’s customer base stretches across the entire EMEA region catering for companies of all sizes and specialisms. We understand requirements within the industry and offer:

  • Advice for R&D and start-up projects
  • One-offs and sample sensor orders
  • Account support for quantity breaks
  • A range of stock available for immediate dispatch.

At Sensors & Instrumentation 2019 we will be showcasing City’s latest long-life oxygen and carbon monoxide sensors as well as our extensive range of high performance sensors.

Our range offers detection for the following gases:

  • Ammonia
  • Arsine
  • Carbon Dioxide
  • Carbon Monoxide
  • Chlorine
  • Chlorine Dioxide
  • Diborane
  • Ethylene Oxide
  • Fluorine
  • Hydrazine
  • Hydrogen
  • Hydrogen Bromide
  • Hydrogen Chloride
  • Hydrogen Cyanide
  • Hydrogen Fluoride
  • Hydrogen Selenide
  • Hydrogen Sulfide
  • Mercaptan
  • Nitric Oxide
  • Nitrogen Dioxide
  • Oxygen
  • Ozone
  • Phosgene
  • Phosphine
  • Silane
  • Sulfur Dioxide
  • Tetrahydrothiophene
  • Combustibles
  • Exhaust Gases
  • General Air Quality.

Sensors are available in different formats to suit specific applications. Our main product range includes:

3 Series
– Wide variety, many with 4-20mA or mV transmitter boards
– General industry applications
– Flue gas emissions monitoring
– Ambient air monitoring
– Medical gas applications.

4 Series
Industry standard for portable gas detectors:
– Oxygen and toxic gases
– IR version for carbon dioxide and methane
– Fully-certified pellistors for combustible gas detection.

5 Series
Premium gas sensors for optimal performance in harsh environments:
– Flue gas analysers
– Combustion efficiency monitors
– Oxygen, carbon monoxide, nitric oxide, nitrogen dioxide, sulfur dioxide, hydrogen compensated carbon monoxide.

7 Series
– General gas detection applications
– Oxygen and numerous toxic gases
– For use in portable or fixed gas detectors
– Medical gas applications.

MICROcel
Our smallest, most compact sensors:
– Oxygen, carbon monoxide, hydrogen sulphide, fully certified combustible gas sensors.

MICROpel
– Combustibles.

Sensoric
– Electrochemical toxic gas sensors
– Excellent performance detecting 20 different gases
– Widest exotic toxic gas sensor offer on the market
– Mini, classic, smart, 4 & 7 series
– Can be supplied with 4-20mA transmitter boards.

4OxLL and 5OxLL Oxygen Sensors

These long-life oxygen sensors are designed to work in an analyser for seven years, the entire life of the instrument. Available in 4 and 5 series formats, they offer an enhanced response time in extreme conditions. Based on “electrochemical pump” technology, the design avoids using a consumable anode (lead) so removing the life-limiting component of many sensors. This technology significantly reduces the cost of ownership and the occurrence of field failure, helping manufacturers reduce their servicing costs.

  • Available in 4 & 5 Series formats
  • Seven year life
  • Fast response & recovery times: T90 <15sec
  • O2offset <0.3%
  • Highly stable: <5% signal loss over lifetime.

Hydrogen Sulphide Sensors

Sensoric cells are designed for operation in a wide range of environments and harsh conditions. Based on 3-electrode electrochemical technology, the new 3E 2000 S is a very selective, high capacity sensor ideal for use in Landfill and Biogas applications.

Available in Mini, Classic, Smart (8 pin pocket) and 4 & 7 Series formats the sensor has a 15 month operating life in normal use. It has a fast response time: T90 < 60 sec, baseline offset: < ±250 nA and Lower detection limit: < 20 ppm.

A5F+ Carbon Monoxide Sensors

The new A5F+ provides extended range CO sensing (for use up to 20,000ppm) above the capacity of the established A5F sensor. This eliminates the need for a second sensor in instruments certified for ‘high range’ applications. The sensor uses a H2 compensated 4 electrode design and a high capacity SOx / NOx filter, providing over five years’ life in typical usage cycles. This sensor fully complies with EN50379-2 & 3.

For more information or technical advice, contact the team on solutions@shawcity.co.uk, call 01367 899419 or visit www.shawcity.co.uk/sensorrange.