Gas measuring system MF420-Ex-2.1 with EX approval for zones 1 and 2

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Data sheet Gas measuring system MF420-Ex-2.1 with EX approval for zones 1 and 2

Benefits

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

Application

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.

Versions

	Part no.	Remember
Gas measuring system MF420-Ex-2.1 (P) methane	69111
Gas measuring system MF420-Ex-2.1 (WT) propane	69004
Gas measuring system MF420-Ex-2.1 (WT) n butane	69007
Gas measuring system MF420-Ex-2.1 (WT) LPG for monitoring of liquefied petroleum gas	69009
Gas measuring system MF420-Ex-2.1 (WT) H₂ for monitoring hydrogen	69010
Gas measuring system MF420-Ex-2.1 (WT) n heptane	69013
Gas measuring system MF420-Ex-2.1 (WT) xylene	69014
Gas measuring system MF420-Ex-2.1 (WT) ethanol	69034
Gas measuring system MF420-Ex-2.1 (WT) i propanol	69035
Gas measuring system MF420-Ex-2.1 (WT) acetylene	69036
Gas measuring system MF420-Ex-2.1 (EC) CO for monitoring carbon monoxide	69037
Adjustment for standard gases per sensor	61177
Adjustment For special gases per sensor	61183

Blue part no. = in-stock items

Downloads

	Description	Format	Language	Download / Link
Data sheet Gas measuring system MF420-Ex-2.1 with EX approval for zones 1 and 2	Data sheet	PDF

Description

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.

Technical data

Measuring range

Version WT:

0/100 % UEG

Version EC:

0/300 ppm

Measuring principle

Heat tone (HT),Electrochemical (EC)

Service life:

Approx. 3 Jahre

Supply voltage

DC 18 – 30 V

Current input

Approx. 105 mA at 24 V

Operating temperature range

Ambient

Temperature class T4:

-40/+60 °C

Temperature class T6:

-40/+50 °C

Humidity/moisture

10/95 % rH, 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

Options

RS 232 interface at control unit