Testo 316-3 Refrigerant Leak Detector (Part Number 0563 3163)Testo 316-3 Refrigerant Leak DetectorxTesto 316-3 Sensitivity down to 0.15 ounces a year Can detect blends including R-410A, R-407C, and R-134a Easy one button operation High/low sensitivity adjustmentThe Testo 316-3 delivers dependable, rugged performance at a great value. The heated diode sensor provides sensitivity down to 0.15 ounces/year, including new refrigerant blends like R-410A, R-407C, and R134-a, allowing you to quickly locate refrigerant leaks.Just turn it on and start getting readings immediately. Thanks to automatic zeroing, the testo 316-3 is extremely fast, and can be used even in previously contaminated areas. The 316-3 has an LED indicator, automatic zeroing, and an audible alarm, all in a rugged housing.OVERVIEWTesto 316-3 Overviewx Flexible probe shaft with probe head Handle with battery compartment Battery indicator PWR (green LED) On/off button, sensitivity Sensitivity indicator HI (high) / LO (low) Gas concentration indicator (yellow LEDs)