Product Specification

P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor Description
This sensor responds well in the temperature and humidity extremes of the oil and gas industry.

Unlike common n-type sensors, this p-type sensor has a large dynamic range, repeatable response, low humidity response and resistance increases in the presence of H2S.

The change in resistance can be converted to an output voltage via a simple electrical circuit. Although the sensor can be used in constant temperature/ voltage mode, best response is achieved when the sensor is cycled between 400°C (sensing temperature) and 525°C (reset temperature). 

Developed over many years, our p-type metal oxide gas sensors offer the following benefits:
? stable baseline
? low humidity sensitivity
? positive response to gases (safer response)

H2S detection at high temperatures (up to 120°C) for oil and gas applications

Each sensor type can be supplied in three housings:
? TO-5 metal can, the most common format
? Plastic 6-pin housing - frequently used with other metal oxide gas sensors
? Ex housing - stainless steel 316 housing with UL, CSA, ATEX and IECEx approvals, unique for metal oxides, allowing use in hazardous areas without the need for an IS circuit

P-Type Metal Oxide Hydrogen Sulfide (H2S) Sensor Housing options