HTM-278 Digital Humidity Temperature Meter Psychrometer Thermo-Hygrometer 999 Sets Data Storage with Dew Point and Wet Bulb Temperature Measurement Dual Display Portable Tester

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A compact, portable Temperature and Humidity meter that features high precision and low power consumption with safe and reliable performance stability.

A perfect tool to use in factories, laboratory, logistics, food staff, air-conditioning industries for monitoring of the changes in the surrounding.


  • MAX and MIN Reading
  • Data Hold
  • Data storage function up to 999 sets
  • LCD Backlight
  • Switch the units: °C/DP/WB/°F
  • Automatic and manual power off 
  • Battery strength indicator


  • Temperature
    • Temperature range: -20~70°C(-4~158°F)
    • Temperature accuracy: ±1°C, ±1%°C between 5~50°C(41~122°F)
  • Humidity
    • Humidity range: 0~100%RH
    • Humidity accuracy: ±4%RH(25°C(77°F)/10~90%RH), Full range accuracy is ±5%RH
  • Dew point and Wet-bulb
    • Dew point & wet-bulb range:-20~50°C
    • Dew point & wet-bulb: ±2°C, ±2%°C(5~50°C(41~122°F)/10~90%RH)
  • Maximum response time: 30s
  • Power supply: 3 x 1.5V AAA Battery
  • Operating Current:
    • Without backlight: about 13mA
    • With backlight: about 17mA
  • Size: approx. 184 x 56 x 36mm
  • Weight: approx. 129.2 g

Set Includes: 

  • 1 x Humidity & Temperature Meter
  • 1 x English User Manual
  • 3 x AAA Battery
  • Standard Factory Packaging

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