Transmitter Range (TR)

Transmitter Range (TR)

The Flamefast Transmitter range can be supplied with any combination of Carbon Dioxide (CO2), Temperature & Relative Humidity. With three 0-10V outputs, an on board relay and the ability to select between Analogue or Thermistor temperature output, our transmitter range is one of the most versatile units available.

With the optional signature Flamefast traffic light display, the sensor can provide a clear, bold indication of the air quality in the monitored space.

This cost effective sensor range is ideal for any application, including natural and demand controlled ventilation as well as for integrating with our range of gas safety systems.


View FileTransmitter Range - CO2, Temp & RH (24V AC/DC)

Key Features

  • 24V AC/DC Power Supply
  • Pluggable terminal block for ease of installation
  • Optional traffic light readout
  • 3x 0-10V outputs
  • Selectable Temperature output (0-10V or 10K3)
  • Volt free contact output
  • Typical 10+ year life expectancy
  • Self-calibrating CO2 sensor
  • Mounts onto any standard single gang junction box or conduit box

Technical Specification

Power Supply 24V AC/DC ±10%
Power Consumption 50mA Max
Analogue Outputs 3x 0-10V
Thermistor Output 10K3A1
VFC Output SPST - 100mA @ 24V Max
CO2 Range 0 - 2,000ppm
CO2 Accuracy ±40ppm +3% @NTP
CO2 Display Resolution 1ppm
CO2 Sensing Method Non Dispersive Infra-red (NDIR)
CO2 Typical Sensor Life 10+ years
Temp Range (0-10V) 0 - 50°C
Temp Accuracy ±0.3°C @ 25°C
Temp Display Resolution 0.1°C
RH Range 0 - 100%
RH Accuracy +/-2% @ 20 - 80%
RH Display Resolution 0.1%
Operating Conditions Temp 0°C to 50°C
Humidity 0 to 95% (NC)
Sampling Method Diffusion
Warm-up Time 30 seconds
IP Rating IP40
Housing Material Flame Retardant ABS
Colour Pure White (RAL9010)
Approval CE


Height 152 mm
Width 110 mm
Depth 50 mm
Probe Length 200 mm

Installer Selectable Options

  • 0-10V or Thermistor Temp output (only one used at any time)
  • Traffic light and relay set points (see below)

The unit has two user selectable programmes to control the traffic light and volt free contact set points depending on the application.

These are as follows:

Program Ventilation Gas Safety
Green - Yellow 1,000ppm 1,500ppm
Yellow - Red 1,500ppm 2,800ppm
Relay Position Normally Open Normally Closed
Relay Set Point   1,000ppm 4,500ppm

Part Numbers & Options / Accessories

Part No Description
TR-CO2T Transmitter - CO2 & Temp
TR-CO2TH Transmitter - CO2, Temp & RH
TR-TH Transmitter - Temp & RH
TR-T Transmitter - Temp
TR-CO2TL Transmitter - CO2 & Temp c/w LCD
TR-CO2THL Transmitter - CO2, Temp & RH c/w LCD
TR-THL Transmitter - Temp & RH c/w LCD
TR-TL Transmitter - Temp c/w LCD

View our Gas Safety Solutions

View our Gas Safety Solutions

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