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GAS
GAS
Gas measuring sensor type designations

Example: GMF X - X - XXX - XX - XXX

Gas measuring sensor

Housing type:
1 - Plastic housing
2 - Square aluminium housing
3 - Special housing
4 - Rectangular aluminium housing
5 - Rectangular plastic housing
6 - Free
7 - Ex housing
UG - Air channel housing venturi tube
DUO - 2 housings one upon the other
I - Infrared service interface

Measuring principle:
E = Electrochemical
H = Semi-conductor chemical formula
P = Platinum electrical resistor
Z = Zirconium oxide
IR = Infrared technique

Type of gas:
Chemical formula / abbreviation

Measuring range:
0 – 1 ppm 00 0 – 2,000 ppm 12
0 – 5 ppm 01 0 – 4,000 ppm 13
0 – 10 ppm 02 0 – 30,000 ppm 14
0 – 20 ppm 03 0 – 5,000 ppm 18 GAS WARNING DEVICES
0 – 30 ppm 04 0 – 100 % UEG 30
0 – 50 ppm 05 0 – 1 Vol % 50
0 – 60 ppm 06 0 – 4 Vol % 52
0 – 100 ppm 07 0 – 5 Vol % 53
0 – 300 ppm 08 0 – 25 Vol % 54
0 – 3,000 ppm* 09 0 – 100 Vol % 55
0 – 1,000 ppm 10 0 – 20 Vol % 56
0 – 1,500 ppm 11

Options:
MOD = Modbus RS485
HP-MOD = Modbus RS485 with integrated horn
… = other options

Examples:
CO gas measuring sensor Electrochemical, 0 – 300 ppm, conventional 4 – 20mA GMF 4.E.CO.08
CO gas measuring sensor Electrochemical, 0 – 300 ppm, bus-capable GMF 4.E.CO.08.MOD
Natural gas sensor Half-wire, 0 – 300 ppm, bus-capable GMF 4.H.CH4.08.MOD
Natural gas sensor Pellistor, 0 – 100 % UEG, conventional 4 – 20 mA GMF 2.P.CH4.30.
Nitrogen dioxide sensor Electrochemical, 0 – 100 % Vol %, conventional 4 – 20 mA GMF 4.E.NO2.55
CO+NO2-combined sensor Electrochemical, 0 – 300 ppm / 0 – 20 ppm NO2, bus-capable GMF 5.E.CO+NO2.08+03.MOD
Freon R134a IR technology, 0 – 2,000 ppm, bus-capable GMF 5.IR.R134a.12.MOD

* Conversion Example 3,000 ppm is equal to 0.3 vol%

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