Fieldpiece ATH4 Dual-Temperature Accessory Head<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Designed for HVAC/R， the Dual-Temperature Accessory， model ATH4， measures two temperatures and calculates the difference in English or metric units</li><li>Field calibration for ±1-Degree F accuracy</li><li>Displays -Degree F directly at 01-Degree F resolution on DMM with 01mVDC resolution</li><li>Select Degree F or Degree C</li><li>Converts from -50-Degree F to 1800-Degree F (optional thermocouple required for 1800-Degree F)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31stQ015C6L.jpg" noproxy>