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Industrial technology Alarm units, gas alarm systems and gas analysers MF420-Ex-2.1
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MF420-Ex-2.1

Gasmesssystem mit EX-Zulassung für Zone 1 und 2

Variants

  • 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.

Part no.
Gas measuring system MF420-Ex-2.1 (P) methane69111
Gas measuring system MF420-Ex-2.1 (WT) propane69004
Gas measuring system MF420-Ex-2.1 (WT) n butane69007
Gas measuring system MF420-Ex-2.1 (WT) LPGfor monitoring of liquefied petroleum gas69009
Gas measuring system MF420-Ex-2.1 (WT) H2for monitoring hydrogen69010
Gas measuring system MF420-Ex-2.1 (WT) n heptane69013
Gas measuring system MF420-Ex-2.1 (WT) xylene69014
Gas measuring system MF420-Ex-2.1 (WT) ethanol69034
Gas measuring system MF420-Ex-2.1 (WT) i propanol69035
Gas measuring system MF420-Ex-2.1 (WT) acetylene69036
Gas measuring system MF420-Ex-2.1 (EC) COfor monitoring carbon monoxide69037
  • in-stock items
  • manufactured goods

Measuring range
version WT:
0/100 % UEG
Measuring principle
heat tone (HT)
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

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