Testo: Refrigerant Leak DetectorTesto 316-3 is a reliable refrigerant leak detector that delivers dependable, rugged performance and value. The proven heated diode sensor provides great sensitivity down to 0.15 ounces/year. Just turn it on and start getting readings immediately. Thanks to the automatic zeroing, the Testo 316-3 is extremely fast and can even be used in previously contaminated areas.

Testo Inc.