GMM222

Last modified by Administrator on 2022/05/19 10:34

Manufacturer's Website

GMM222 is discontinued and GMP222 would be the replacement.

Calculation Notes

Sensor Code:	GMM222
Sensor:	GMM222 from Vaisala Inc.
Measurement:	CO₂ Concentration (ppm)

Output 1:	Volts		Range 1:	0 to 2.5
Output 2:	$Concentration (ppm) = \frac{output1*k}{2.5}$		Range 2:	0 to 5000, 0 to 7000 (depending on range)

k is either 5000ppm or 7000ppm

Wiring Diagram

Other Notes

Each GMM222 probe was covered with a micro-porous PTFE sleeve. The sleeve was attached to the cable, below the connector, using a cable tie and filled with Eucolastic sealant. This was to create a water tight boundary to protect the probe. A diagram of this is shown below: