You are Here: Home » Stationary/Fixed/Continuous Monitors » EX-5150 MOS

Navigate this page: Specifications Typical Calibrations Contact ENMET Download Printable Version for this Instrument Go To Product Literature   Gas Types ------------------------------------- Acetone Acetylene Ammonia Arsine ------------------------------------- Benzene Boron trichloride Butane 2-Butanone ( MEK ) 2-Butanone ( MEK ) Bromine ------------------------------------- Carbon dioxide Carbon monoxide Chlorine dioxide Combustible Gas ------------------------------------- Diborane Dichlorosilane Disilane ------------------------------------- Ethyl alcohol Ethylene Ethylene oxide ------------------------------------- Fluorine Formaldehyde ------------------------------------- Gasoline Germane ------------------------------------- Heptane Hexane Humidity/Dew Point Hydrocarbons Hydrogen Hydrogen bromide Hydrogen chloride Hydrogen cyanide Hydrogen fluoride Hydrogen selenide Hydrogen sulfide ------------------------------------- Isobutane Isopropyl alcohol ------------------------------------- Kerosene ------------------------------------- Methane Methyl ethyl ketone ------------------------------------- Natural gas Nitric oxide Nitrogen dioxide ------------------------------------- Octane Organic solvents Oxygen Ozone ------------------------------------- Propane Propylene Propylene oxide Phosgene Phosphine ------------------------------------- Silane Solvents Sulfur dioxide ------------------------------------- Toluene ------------------------------------- Water/Dew Point ------------------------------------- Xylene   Calibration Equipment, Replacement Parts and Accessories are available. Call us for More Information.

EX-5150 MOS
Sensor/Transmitter for PPM Hydrocarbons
and Organic Solvents

• Solid-state sensor

• Explosionproof design

• NEMA-4x enclosure

• 4-20 mA output

• Liquid crystal display

• Non-intrusive calibration

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 MOS sensor can provide monitoring capability similar to that of the classic catalytic bead or hot-wire sensor, but it can be calibrated for either % LEL or ppm detection levels of a wide range of hydrocarbons and organic solvents. The MOS sensor can also be used for detecting certain common toxic gases, including NH3, CO, H2S, etc.

MOS sensors operate at lower temperatures than catalytic bead/hot-wire 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 hot-wire sensors and also influence the performance of MOS sensors under certain conditions. Applications for monitoring of hydrogen and hydrocarbon gases where silicones are present in the environment should be discussed with ENMET.