With the ExDetector SC 220, combustible gases and vapors can be detected in the measuring range from 0 to 50 % LEL. A semiconductor gas sensor is used for the measurement, which is very robust. It is often a useful alternative to sensors that cannot be used due to the presence of catalyst poisons in the atmosphere.

The ExDetector SC 220 is stand-alone capable, i.e. it can independently initiate protective measures without the additional use of an evaluation device. Integrated low-voltage switching outputs for pre-alarm and main alarm as well as sensor fault are available. It can also be connected conventionally to an evaluation center.

It can be used in Ex zone 2.

• electrical safety of the equipment:
  II 3 (2) G
  Ex nA de [ib] IIC T4
  PTB 07 ATEX 1002
  
• detectable gases:
  explosive gases and vapors
  Sensor type M: methane
  Sensor type P: propane, heptane, hydrogen
  Sensor type S: R134a

• Measuring range 0 – 50 % LEL (lower explosion limit)
• Measuring principle semiconductor gas sensor
• linear measuring signal 4 – 20 mA
• One-man calibration – direct calibration at the detector (optional operating device)
• Integrated low-voltage switching outputs for pre-alarm and main alarm