EX-5155
Explosionproof Sensor/Transmitter for PPM Toxic Hydrocarbons
and Organic Solvents

 

Solid-State MOS Sensor

Three Alarm LEDs

NEMA-4X, NEMA 7 and IP66 Rated Enclosure

24 VDC, 4-20 mA

Liquid Crystal Display

Non-Intrusive Calibration

Approved for Class I, Division 1, Groups B, C, & D

 

An MOS sensor consists of a heated mixed metal oxide element that decreases in resistance in the presence of many gases and vapors. These sensors are broad range in their response characteristics. Different types of MOS sensors are available which can be optimized for a particular gas, but they are inherently non-specific.

 

The EX-5155 can provide ppm level monitoring capability for detecting certain common toxic gases, including NH3, CO, H2S, in addition to a wide range of hydrocarbons and organic solvents.

 

MOS sensors operate at lower temperatures than catalytic type sensors, which makes them less prone to poisoning. The MOS sensor is therefore the sensor of choice in applications where, for example, lead, phosphates or sulfur-containing compounds are present. Silicones, which are used in a wide range of oils, lubricants, adhesives, and many other products, can poison catalytic sensors and also influence the performance of MOS sensors under certain conditions. Applications for monitoring of hydrocarbon gases where silicones are present in the environment should be discussed with ENMET.

 

Specifications