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.

01367 899420

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