Gas measuring system MF420-Ex-2.1 (EC) CO for monitoring carbon monoxide | 69037
Gas measuring system MF420-Ex-2.1 with EX approval for zones 1 and 2
- for monitoring of combustible gases and vapours or carbon monoxide
- on site calibration by one person (without opening the housing), indication of measured value and system info
- measuring principle: Heat tone principle (WT) or electro-chemical principle (EC)
- suitable for control units GW-S 2.1, GW-S4.1 and GW-SK 6.1
For the detection and monitoring of flammable, explosive, toxic gases or oxygen. Can also be used in dusty and dirty environments. Can be used as standalone measuring system or in conjunction with the gas alarm systems GW-S 2.1, GW-S4.1 und GW-SK 6.1 as a complete gas alarm facility for hazardous areas. Approved for operation in potentially explosive atmospheres/EX areas zone 1 and zone 2.
Gas sensor with digital display in compact wall mounting housing. Diverse gases can be monitored (see ordering table). Connection cable (shielded) 3 x 1.5 mm2 Cu+ protective conductor, supply and return conductor (max. 100 Ohm line resistance). Thanks to the local display, it is possible to immediately read current measured values, perform calibration and set limit values. The concentration is output via the 4–20 mA interface for further processing.
- Measuring range
- version EC:
- 0/300 ppm
- Measuring principle
- electrochemical (EC)
- Service life:
- ca. 3 Jahre
- Supply voltage
- DC 18 − 30 V
- Current input
- ca. 105 mA ca. at 24 V
- Operating temperature range
- Ambient
- temperature class T4:
- -40/+60 °C
- temperature class T6:
- -40/+50 °C
- Humidity/moisture
- 10/95 % r.F., Non-condensing
- Atmospheric pressure
- 700/1 300 hPa
- Housing
- Wall mounting housing
- material:
- aluminium alloy/stainless steel
- ⌀ x H:
- 84 x 78 mm
- Weight:
- 1.1 kg
- Degree of protection:
- IP 65 (EN 60529)
- Output signal
- 4–20 mA
- Ex approval
- Ex II 2G Ex de IIC T6/T4 Gb