description hvac clamp meter, differential temp klein tools cl450 clamp meter with dual display is a "game changer" for the hvac professional. it measures ac/dc voltage up to 1000v, 600a ac current, 60m resistance, dc millivolts and microamps. this true rms cat iv 600v meter offers differential temperature, digital temperature calibration, inrush current and many other functions for hvac applications. digital clamp meter measures 600a ac, 1000v ac/dc, 60m. hvac tester has 2 k-type thermocouple ports for differential temp. automatically ranging trms measurement technology for accuracy. dedicated mode for capturing dc microamp and inrush current. low-pass filter and low impedance (loz) mode for identifying and eliminating ghost or stray voltages. dual backlit 6000 lcd display for clear visibility in environments with low ambient lighting. rugged design with a 6.6-foot (2 m) drop protection and a cat iv 600v safety rating. includes carrying case, instruction manual, straight input test leads, two k-type thermocouples, and 3 x aaa batteries. can be used with magnetic hanger cat. no. 69417 (sold separately). use with k-type temperature pipe clamp cat. no. 69140, and k-type temperature probe cat. no. 69144 (sold separately). for more than 160 years, klein tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. klein isn't just the name of our company, it's also our family name. and since we're an american company that's family-owned and family-run, you know you can count on us to be here tomorrow. klein tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... since 1857. california proposition 65 warning. view warning label features electrical tester measures ac/dc voltage up to 1000v, 600a ac current, 60mohms resistance, dc millivolts and microamps amp clamp with automatically ranging true root mean squared (trms) measurement technology for accuracy cat iv 600v, cat iii 1000v, class 2, double insulation safety rating clamp measures ac current and inrush current two k-type thermocouple ports for differential temperature measurements test leads measure ac/dc voltage, dc microamp, resistance, loz, continuity, frequency, duty-cycle, capacitance, and diodes dedicated mode for capturing dc microamp and inrush current low-pass filter and low impedance (loz) mode for identifying and eliminating ghost or stray voltages dual backlit 6000 lcd display for clear visibility in environments with low ambient lighting rugged design with a 6.6-foot (2 m) drop protection and a cat iv 600v safety rating can be used with magnetic hanger cat. no. 69417 (sold separately) use with k-type temperature pipe clamp cat. no. 69140, and k-type temperature probe cat. no. 69144 (sold separately) specifications ac voltage 1000 acme tools brand name klein tools acme tools part number cl450 assembled weight (lbs) 0.787 california proposition 65 warning required yes case included yes continuity yes country of origin china dc polarity indicator yes dc voltage 1000 digital / analog digital globaltradeitemnumber (gtin) 00092644690631 impedance yes internal supplier part # cl450 internet product code (ipc) 13d4e889f2a manufacturer warranty please refer to attached warranty document. material plastic maximum amperage (a) 0 meter type clamp non-contact voltage detection yes package contents case package depth 13.25 package height 2.5 package weight 1.5 package weight (lbs) 1.5 upc 092644690631