Hollis Explorer CO2 Sensor


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The Hollis gaseous CO2 sensor is a highly-recommended accessory of the Explorer CO2 filter monitoring system. Capable of detecting high workloads, problems with the absorbent or even CO2 seal damage, when used properly, it will add another safeguard to the use of your Explorer rebreather and provides a level of confidence never before available.

The CO2 sensor used in the Explorer is an NDIR (Non-Dispersive Infrared Sensor).
It relies on an optical path to measure the concentration of CO2 within the breathing loop.
Because water vapor can condense on the optical elements of the sensor blocking the infrared signal the sensor uses, resulting in false CO2 readings, Hollis uses special desiccate silica gel beads designed to prevent moisture buildup.
The silica beads also conveniently change color letting the user know when it's time to replace them.

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