6-in-1 Digital Psychrometer with Enthalpy

ITEM # EP8711P

6-in-1 Digital Psychrometer with Enthalpy

The #EP8711P enables HVAC/R technicians to measure six heat-related parameters with a single instrument. The unit can make the in-duct measurements of an evaporator unit’s output needed to fine-tune a system for optimum efficiency. By calculating the enthalpy of the system, the EP8711P allows a technician to compare a system’s efficiency before and after charging with a refrigerant.


Best For:




  • Measures: 1) ambient temperature, 2) relative humidity (RH), 3) dew point, 4) wet bulb temperature, 5) mixing ratio in grains per pound (GPP) or g/kg, and 6) enthalpy in Btu/lb. or kJ/kg
  • 6-in. long sensor with graduated insertion depth markings can be swiveled inside a vent or grille
  • Large 4-digit LCD
  • °F/°C switch
  • Auto power off
  • NIST calibration is available
  • Specifications


    • Ambient temperature measurement range/resolution: -4° to 158°F (-20° to 70°C)/0.1°
    • Ambient temperature measurement accuracy: ±0.9°F (±0.5°C) from 14° to 104°F (-10° to 40°C); ±1.8°F (±1°C) elsewhere in range
    • RH measurement range/resolution: 0 to 100%/0.1%
    • RH measurement accuracy: ±3% from 20% to 80% RH; ±3.5% elsewhere
    • Dew point temperature measurement range: -76° to 158°F (-60° to 70°C)
    • Wet bulb temperature measurement range: -49° to 158°F (-45° to 70°C)
    • Mixing ratio range: 0 to 999 GPP (0 to 280g/kg)
    • Enthalpy range: -8 to 318 Btu/lb. (-20 to 740kJ/kg)
    • Probe dimensions: 6 in. (150mm) x 1 in. (25mm)
    • Display size: 1.5 in. (38mm) diagonal
    • Auto power off: After 2 minutes of inactivity
    • Weight (without batteries): 2.2 oz. (63g)
    • Power source: Three "AAA" batteries (included)


    • Sensor protection cap
    • Batteries
    • 1-year limited warranty


    • 8.23 x 1.85 x 1.85 in. (209 x 47 x 47mm)


    What is a psychrometer?

    A psychrometer is an instrument that measures both the wet bulb and dry bulb temperatures.

    Prop 65

    ⚠ WARNING: This product can expose you to chemicals including di2-ethylhexylphthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.