Honeywell Analytics supplies H2S Sensor for Detection of Hydrogen Sulfide. Honeywell Analytics products are manufactured in accordance with UL 2034, BS 7860:1996, and EN-50291:2001 and ISO 9001:2000. The H2S Sensor for Detection of Hydrogen Sulfide or 705 H2S Sensor is a low cost, explosion proof assembly fitted with a Sieger long-life electrochemical cell. Fully encapsulated, the 705 H2S Sensor is approved for use in hazardous areas. The 3-electrode, electro-chemical cell is designed to be maintenance free and stable over long periods of time. It is almost unaffected by moisture and the response time is not temperature dependent.