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4 to 20 mA Analogue Transmitter Boards
--- for Alphasense “B” Type Toxic & O2-A2 Oxygen Sensors

Alphasense transmitter boards offer:
1) exceptional stability.
2) minimal settling time when put on load.
3) wide operating voltage range and
4) low RFI susceptibility through the use of an unbroken ground plane.

Specifications:
1) Input voltage required : +7.5 to +35.0 Volts DC
2) Output at zero gas concentration (or 15% Oxygen) : 4 mA (user adjustable)
3) Output at full-scale (or 25% Oxygen) : 20 mA (user adjustable)
4) Setability/stability <0.5mA (<0.25% Full Scale)
5) Maximum load (@ 20 mA, 24 VDC) : 825ohms
6) Supply voltage dependence < ±0.2% output from +7.5 to +35 Volts DC
7) Connector :2 pin Molex plug (ref. 22-27-2021) supplied with leads
8) Transmitter current requirement <100 uA