Thermo Scientific, GasTech, Standard Diffusion Gas Transmitter

From Thermo Scientific,

The Thermo Scientific Standard Diffusion Transmitter is a gas sensor that is used in

conjunction with a controller to create a complete gas detection system. Each

Transmitter acts as a single-point gas detector. Thermo Scientific Gas Detection

Systems can use multiple Transmitters to create custom multi-point systems.

The Standard Diffusion Transmitter can be configured for the detection of: hydrocarbon

gases, ammonia, arsine, carbon monoxide, carbon dioxide, chlorine, chlorine dioxide,

diborane, fluorine, hydrogen chloride, hydrogen cyanide, hydrogen fluoride,

hydrogen sulfide, nitric oxide, nitrogen dioxide, oxygen, ozone, phosphine, silane

and sulfur dioxide.

Most common applications include: 

automotive manufacturing, semiconductor manufacturing, chemical and petrochemical

refineries, as well as water treatment facilities. However, with all of the possible

detection configurations the application possibilities are endless.

The transmitter’s toxic and oxygen sensors work on the electrochemical principle.

Gas diffuses into the sensor through a fluorocarbon membrane. A chemical

reaction creates a current flow between the electrodes proportional to the concentration

of gas present in the atmosphere. The combustible sensor works on the

Wheatstone bridge circuit. A constant DC voltage is applied to a catalytic bead,

increasing the temperature to 550°C. Combustible gas oxidizes on the active

element, increasing its resistance. The increase in resistance is proportional to

the concentration.

Features Include:

• Housed in a rugged, copper-free aluminum weatherproof enclosure

• Connects to Thermo controllers, PLC (Programmable Logic Controllers) or DCS (Distributive Control Systems)

• Easy plug-in electrochemical sensors 

• Easy one-person calibration

• Economical remote transmitter

• Combustible gas version, UL Classified for Class I, Division 1, Groups B, C & D, hazardous locations

Available Standard Diffusion Transmitter Configurations

Part Number         Description

65-5001               Combustibles (specify range 0-100% or 0-5,000 ppm)

67-0002               0-5,000 ppm carbon dioxide (CO2)

67-0003               0-1.0% Vol carbon dioxide (CO2)

67-0004               0-5.0% Vol carbon dioxide (CO2)

67-0027-01          0-500 ppm carbon monoxide (CO)

67-0027-02          0-100 ppm hydrogen sulfide (H2S)

67-0027-03          0-30.0% Vol oxygen (O2)

67-0027-04          0-10.0 ppm chlorine (Cl2)

67-0027-05          0-30.0 ppm hydrogen chloride (HCl)

67-0027-06          0-10.0 ppm hydrogen fluoride (HF)

67-0027-09          0-100 ppm ammonia (NH3)

67-0027-17          0-20.0 ppm sulfur dioxide (SO2)