Proud Distributors of GUNT Hamburg, UTEST, FOUR E’s Scientific & LABTECH ITALY

Indoor Thermometer-Hygrometer and Dew Point Meter (LES-AZ87791)

Indoor Thermometer-Hygrometer and Dew Point Meter (LES-AZ87791)

SKU LES-AZ87791 Categories ,

Simultaneously Display Temperature and humidity

Code LES-AZ87791
  • Indoor Temperature: 0~+50°C (Display -10~+70°C)
  • Temperature accuracy: ±1°C
  • Indoor Relative humidity: 20~90% (Display 0~99.9%)
  • RH accuracy: ±5% (10~90%)
  • Dew Point: -20~+70°C
  • Minimum and Maximum memory with reset
  • High/Low alarm settings with visual Red LED and buzzer
  • Desktop stand or wall hanging
  • 3 x AA alkaline batteries included
  • Size: 110 x 91 x 30mm (LCD 63 x 70mm)

What is Dew point (DP)?

  • The Dew point temperature is the temperature at which the air can no longer hold all of its water vapor and some of the water vapor must condense into liquid water.
  • Condensation of liquid water vapor begins when the temperature of air is lowered to its dew point and beyond.
  • The dew point is associated with relative humidity.
  • A High relative humidity indicates that the dew point is closer to the current air temperature.
  • Relative humidity of 100% indicates the dew point is equal to the current temp. and the air is maximally saturated with water.
  • When the dew point remains constant and temp. increases, relative humidity will decrease.

Dew Point Application:

  • In summer of high humidity season, identifies and warns when conditions for mould growth exists.
  • In winter or low humidity season, identifies and warns when conditions for static electricity exists.
  • Air temp. and dew point temp. indicate where condensation may occur.
  • Monitor conditions in laboratories, basement and other controlled environment settings.


Model LES-AZ87791
Temp. range 0℃-50℃ (display -10.0-70.0℃)
Temperature Resolution 0.1℃/℉
Temp. Accuracy +/- 1℃
Humidity Range 20%-90% RH (Display 0% – 99.9% RH)
Humidity Resolution 0.1%RH
Humidity Accuracy +/-5%RH (at 25℃, 10-90% RH, others +/- 7%RH)
Dew Point Temp. Range -20-70℃
Beeper (Db) -65dB
Response time 120 seconds typical
RH% Self calibration Yes
Power consumption ‹0.11mA
LCD Size (mm) 63 (H) X 70 (W)
Operation Temp. 0-50℃
Operation RH Humidity ‹80%
Storage Temp. -10-50℃
Storage RH% Humidity ‹90%
Dimensions (mm) 110 x 91 x 30 (h)
Weight -200g
Battery AA x 3 pcs
Standard Package Meter/ Battery/ Manual/ Paper box

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.