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This is one of my best deals ever! This is a used Digital Control Systems, Inc CO2 sensor with a measurement range of 0-20%. I have using these sensors for over 12 years and have been extremely happy with their performance.  These sensors list for ~$600.00 new!

Please note that I have several of these sensor units that I will be auctioning off over the next several months so the serial number of the sensor you receive may differ from the serial number shown. All sensors are identical, all were removed from working equipment removed from service. All have the same specification and range and all have been thoroughly tested for proper function.

The sensor head is remotely mounted in the chamber to be measured and connected to the control board via a ribbon cable. The supplied ribbon cable is ~12" in length but may be replaced with a longer cable if needed. The sensing head uses a tungsten lamp that had been burned in for over 30 days until the output is stable. A detector inside of the head then determines how much light, at a frequency specific to that absorbed by CO2, reaches it. A comparative measurement is then made between the beam exposed to the atmosphere being sampled and a closed reference path. This allows the on-board processor to determine the amount of CO2 in the sampled environment.

The board is powered from a 10 - 35 VDC power source. Output from the board is customized to 0 - 5 volt signal or a 4-20mA current loop. Accuracy is +/- 5% of reading or 0.5% of full scale, whichever is greater.

There is only so much I can type here so if this sensor is something you are interested in bidding on I suggest you download and read the sensor manual for complete information on this unit.

Good Luck and please ask any questions before bidding.