Duoyi DY522A Black Vacuum Pressure Tester Refrigeration Digital Manifold Gauge rv Audio tone indicates positive with

Audio tone indicates positive with a high pitched tone and negative with a low pitched tone

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drain lines including sinks

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Duoyi DY522A Black Vacuum Pressure Tester Refrigeration Digital Manifold Gauge rv Audio tone indicates positive withDigital Manifold Gauge Set For 92 RefrigerantsCompared with other refrigerants meter,our digital manifold gauge can be filled with 92 types of refrigerants and has a wide range of applications. Meter have multiple functions such as dual pressure temperature test,condensation evaporation pressure temperature test,pressure leak test,vacuum degree test,calculation of supercooling superheating. It is suitable for refrigeration equipment such as air