EFM IR

Sales Literature

The EFM/IR series of transmitters use the very reliable NDIR (Non dispersive Infrared) sensor technology to monitor the presence of carbon dioxide, methane or propane (depending on model). The Infrared sensor is SIL2 approved and has a wide operating temperature and humidity range. This technique is based upon the fact that gas has a well defined light absorption curve in the infrared spectrum that can be used to identify and detect specific gases. The EFM/IR is equipped with electronics and firmware that provide linearised and temperature compensated analogue output in the industry standard 4-20mA output format.

The EFM/IR range

  • EFM 1R 1 Propane (0-100% LEL)
  • EFM 1R 2 Methane (0-100% LEL)
  • EFM 1R 3 Carbon Dioxide 0-5000ppm / 0-1% Vol 0-2% / Vol 0-3% Vol