Toxalert Air Quality International

MODEL TOX-O2/DIG GUIDE SPECIFICATION FOR OXYGEN SENSOR WITH RELAY OUTPUTS

 Toxalert Air Quality International

Provide Toxalert model TOX-O2/DIG oxygen sensor(s) with a range of 0 to 25% and two adjustable output relays over its range. The sensor shall be housed in an industrial style explosion proof housing. The sensing element shall be electro chemical diffusion barrier type and be designed for ten (10) year element life. Electro chemical cells with a three year or less expected life are not acceptable. The sensor shall be 24 vdc powered. If the sensor should fail it shall drive its output signal to zero indicating zero percent oxygen and energizing both output relays.

The oxygen sensor shall have the following diagnostic light emitting diodes (LED’s):

  1. Warning relay energized
  2. Alarm relay energized
  3. Power
  4. Sensor failure
The warning relay and alarm relay shall be Form C contacts and the relay setpoints shall be field adjustable without calibration gas. Relay contacts shall be rated for 1 amp at 24 vdc.

Sensor shall have volt meter terminals on face of sensor to indicate percent oxygen being detected.


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