Thermo Standard Diffusion Transmitter

Fixed Gas Sensor

Thermo's standard diffusion sensors are used in conjuction with controllers to complete a fixed gas monitoring system for combustibles, O2, and various toxics. All sensors feature an industry standard 4 to 20 mA output.

The Standard Diffusion Transmitter is the most common sensor used when configuring a complete fixed gas detection system. Their 4 to 20 mA output can connect to various monitoring and control systems. Each sensor is housed in a weatherproof rugged enclosure and features easy calibration. Each sensor acts as a single point and when combined with a suitable controller can create endless configurations, from simple single point installations, to large entire complex monitoring systems. Using standard technology, electrochemical for toxic and O2 sensors, wheatstone bridge circuits for combustible sensors, Thermo's standard diffusion transmitters are designed for durabililty and long life.

This sensor is compatible with Thermo's Safe T Net line of controllers, including the Safe T Net 100, Safe T Net 210, Safe T Net 410, and Safe T Net 2000.


Thermo Standard Diffusion Sensor Ranges

The Standard Diffusion Transmitter can be configured to detect the following gasses:

Gas Sensor Type Formula Standard Range
Ammonia Electrochemical NH3 0 to 100 ppm
Carbon Monixide Electrochemical CO 0 to 500 ppm
Carbon Dioxide Electrochemical CO2 0 to 5000 ppm
0 to 1% Volume
0 to 5% Volume
Chlorine Electrochemical Cl2 0 to 10.0 ppm
Fluorine Electrochemical F2 0 to 10.0 ppm
Combustible Catalytic 0 to 100% LEL
0 to 5000 ppm
Hydrogen Chloride Electrochemical HCl 0 to 30.0 ppm
Hydrogen Fluoride Electrochemical HF 0 to 10.0 ppm
Hydrogen Sulfide Electrochemical H2S 0 to 100 ppm
Oxygen Electrochemical O2 0 to 30.0% Volome
Sulfur Dioxide Electrochemical SO2 0 to 20.0 ppm

Thermo Standard Diffusion Gas Transmitter

  • Part Number/Description
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  • 65-5001Standard diffusion transmitter1, combustible
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  • 67-0002Standard diffusion transmitter2, CO2
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  • 67-0003Standard diffusion transmitter3, CO2
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  • 67-0004Standard diffusion transmitter4, CO2
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  • 67-0027-01Standard diffusion transmitter, CO
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  • 67-0027-02Standard diffusion transmitter, H2S
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  • 67-0027-03Standard diffusion transmitter, O2
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  • 67-0027-04Standard diffusion transmitter, Cl2
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  • 67-0027-05Standard diffusion transmitter, HCl
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  • 67-0027-06Standard diffusion transmitter, HF
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  • 67-0027-09Standard diffusion transmitter, NH3
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  • 67-0027-17Standard diffusion transmitter, SO2
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