Testo 0393 0005 O2 Sensor, 0-21.0 vol% (320 series)

O2 sensor, 0-21.0 vol%For use with testo 320 series only.

Once opened or activated, units are Non Returnable / Non Refundable. See our Returns Page Exclusions section for more info.

Return Eligibility: This product may be returned within 30 days only while the factory sensor package remains sealed. Once the package is opened and the sensor is exposed to air, its service life begins and it is no longer eligible for an ordinary return.