AMS 3175 Ex

The Oxygen Analyser AMS 3175 is the stationary measuring system for combustible and non combustible gases in Ex-classified areas.

The electronics and the gas analysis are separated from each other and installed in a gas-tight wall mounting housing. The AMS 3175 is Ex-certified for applications in Ex-Zone1, according Ex ia IIC T6.

Since the process gas is fed to the AMS Oxygen Analysers, usually by applying the pressure in the gas line on the analyser, it is essential to vent the gas at the outlet at atmospheric pressure. The diameter of the gas line at the outlet is 6 mm, and may not be reduced in diameter over the length of the vent-line.

Technical data

AnalyserAMS 3175 Ex
Ex-classificationATEX 2 G, Ex ia IIC T6
Measuring principleElectrochemical oxygen sensor
ApplicationGases Industries, Chemical Industries
Measuring rangemax. 4 manual selection 
0 … 10, 0 … 100, 0 … 1000, 0 … 10000 ppmv
Analogue signal port4 … 20mA two-wire transmitter
Reproducability+/– 2 % of the measuring value
Resolution0,01 ppm – C(O2) – 1 ppm
depending on the O2 concentration
T90-Timeca. 40 seconds
Display4 ½ digit LCD display
Messages2 free adjustable isolated changeover relays
Gas connectioninlet / outlet 3 / 6 mm ferrule pack
Gas samplingbuilt-in inlet / outlet valve
Sample flowmin. 20 Nl/h, max. 40 Nl/h
Sample pressure (inlet)min. 1,01 bar abs., max. 2 bar abs.
Sample pressure (measuring cell)max. 50 mbar pressure
Ambient operating temp.- 0 °C up to + 45 °C
Relative humidity of the gas0 … 99 % not condensing
Power supply24 VDC intrinsically safe
Protection / Housing /IP 65 / wall mounting housing off Aluminium die-casting,
Dimensionsseparated for electronic and gas analytics / 446 x 232 x 180 mm (hxbxt)
Ex-classificationATEX 2 G, Ex ia IIC T6
Weight9 kg
Optionsintrinsically safe power supply with signal separator
Flame arrester ATEX II G IIC
Version: AMS 3175 E V-2013-07