Check the listing for details. QwikProducts QT2000 QwikCheck Acid Test Kit. Condition: New. Listed at 17.59 USD. Electrical HVAC Thermostats Thermostat Wire Tools Plumbing QwikProducts QT2000 QwikCheck Acid Test Kit The QwikCheck Acid Test detects inorganic acid in 2-seconds down to 1 part per million in HVAC/R systems. Fast, accurate, and easy to use, QwikCheck provides an early warning of acid problems. The Yellow to Red color change allows you to easily and clearly communicate the need for action to the equipment owner. Works with all refrigerants and oils. Meets EPA venting regulations. For use, simply insert the valve core depressor into the center of the suction-side, vapor-service/Schrader valve while system is operating. Product Details Color Height 3.375 Length 8.750 UPC 711582011000 HVACSurplus.com works with a wide variety of brands that you know & trust. Some of our brands include: Aprilaire ∙ Belimo ∙ Braeburn ∙ CPS Products ∙ DiversiTech ∙ Ecobee ∙ Emerson ∙ Functional Devices ∙ GeneralAire ∙ Honeywell ∙ ICM Controls ∙ iO HVAC Controls ∙ Jackson Systems ∙ Johnson Controls ∙ Kidde ∙ LeakSmart ∙ Little Giant ∙ Lux ∙ Malco ∙ MA-Line ∙ NAVAC ∙ Nest ∙ Packard ∙ Peco ∙ Pro1 IAQ ∙ Ranco ∙ Rectorseal ∙ Resideo ∙ Ring ∙ Robertshaw ∙ SolderWeld ∙ Skytech ∙ Supco ∙ UEI Test Instruments ∙ Universal Secruity Instruments ∙ Vents US ∙ White-Rodgers