SRX-MTL-2CXL PPM O2 Sensor – Replaces Teledyne C06689 L-2CXL PPM O2 sensor. This PPM O2 sensor can measure oxygen down to 0.1 PPM level in inert atmosphere. Recovery from air to 10 PPM in under 45 minutes. This sensor has larger electrolyte reservoir and thus is ideal for measuring oxygen in very dry inert, gaseous hydrocarbon and hydrogen gas streams and gas streams with temperature above 30 degree Celsius. Proprietary electrolyte allows the sensor to recover from air and from process upset quickly. Sensor is designed, developed and manufactured in the USA.