Air Systems O2-Ns-Adpt Oxygen Sensor For Co2-91 Series Monitors

New Oxygen sensor for CO2 series monitors – 1 year warranty. The current replacement sensor (PN: CO2-O2) is no longer being produced with any efficiency so we have switched sensor manufacturers and the type of sensor.  The O2-NS-ADPT is a new sensor plus an adapter that must be installed so the new sensor will work with the monitor. This part number is a one-time purchase because any further sensor replacements will no longer need the adapter, the customer will just be replacing the sensor (part number O2-NS).