Temperature: Essco calibrates a wide range of temperature instruments including thermocouples, thermometers, RTDs, controllers, chambers, ovens and infrared thermometers. We're capable of measuring from -200 to 660 degrees Celsius and generating from -196 to 700 degrees Celsius. Humidity: Essco calibrates all your humidity/dewpoint instruments using state-of-the-art standards. Our humidity chamber allows us to produce humidity levels of 0-100% RH and temperatures from -10 to 70 degrees Celsius.