Temperature/ Humidity Meter with Dew-Point and Wet bulb Tenmars TM-183

DISPLAY : Dual LCD display: The maximum value on the primary display is 1999. The maximum value on secondary display is 9999. Backlit function, compact and light weight. Storage: 200 readings. Auto power off with disable function. Low battery indication. SPECIFICATIONS : Rel( relative) Auto power off Max / Min / Avg Hold Alarm Backlit Dew Point Wet Bulb Stores up to 200 readings APPLICATION : Maintenance Utility Technicians HAVC-service Specifications Humidity range 1 ~ 99% RH Accuracy + / - 2.5% for 30% ~ 80% + / - 3.0% for 20% ~ 29.9% and 80.1% ~ 89.9% , + / - 5% for 1% ~ 19.9% and 90.1% ~ 99.9% Temperature range -20º C ~ 60º C ( -4º F ~ 140º F) Accuracy + / - 0.8º C, + / - 1.5º F Resolution 0.1º C / 0.1º F ; 0.1% RH Size 200 x 56 x 38mm ( L x W x H) Weight 165g