DIAGNOSTIC PRECISION FOR CRITICAL THERMAL MONITORINGEngineered for the rigorous demands of HVAC and industrial maintenance, the Milwaukee 2270-20 Contact Temperature Meter delivers the laboratory-grade accuracy required for complex system balancing and troubleshooting. Its dual-input capability allows for immediate differential temperature readings—essential for evaluating heat exchanger efficiency or cooling coil performance without manual calculation. The rugged over-molded housing ensures the internal electronics remain protected in harsh mechanical rooms, while the high-contrast white-on-black display provides crystal-clear data visibility regardless of ambient lighting conditions. This NIST-certified unit provides the documented precision necessary for mission-critical industrial applications and professional service reporting. / Dual-channel input allows for simultaneous T1 and T2 measurements to quickly calculate Delta T across heating and cooling systems. / Massive temperature range from -328°F to 2500°F covers everything from cryogenic applications to high-heat industrial furnaces. / Laboratory-grade accuracy of 0.1% ±0.7°C ensures precise data for compliance reporting and system optimization. / Integrated timer function tracks minimum, maximum, and average temperatures over time to identify intermittent system spikes. / Hands-free magnet strap secures the meter to ductwork or electrical panels, keeping your hands free for probe placement. TECHNICAL SPECIFICATIONS Temperature Range -328°F to 2500°F (-200°C to 1372°C) Accuracy 0.1% of reading ±0.7°C Display Type High Contrast White on Black Thermocouple Type Dual K-Type Inputs Power Source (3) AA Alkaline Batteries Warranty 5-Year Tool Warranty WHAT'S IN THE BOX(1) Contact Temperature Meter (2270-20), (2) K-Type Thermocouples, (3) AA Batteries, (1) Magnet Strap, (1) NIST Certificate of Calibration, (1) Manual