Calibratable Data Logging Temperature-Humidity Monitor with Jumbo LED Display


Calibratable Data Logging Temperature-Humidity Monitor with Jumbo LED Display

The #LRTH185DL is ideal for monitoring and logging the temperature and relative humidity (RH) of labs, computer rooms, clean rooms and other critical areas. Its huge 8.4 x 4.7 in. red LED display can be seen from a distance.


Best For:



  • Jumbo LED display with clock is designed to be wall-mounted and AC-powered, with battery backup
  • Adjustable Hi & Lo temperature and RH alarms
  • 33% and 75% #HR33 and HR75 reference salts are available to calibrate RH measurement in the field
  • Data hold
  • Internal data logging memory
  • USB jack
  • NIST calibration is available


  • Temperature measurement range/resolution: -4° to 140°F (-20° to 60°C)/0.1°
  • Temperature measurement accuracy: ±1.8°F (±1°C) from 32° to 104°F (0° to 40°C); ±3.6°F (±2°C) elsewhere in range
  • RH measurement range/resolution: 5 to 95%/0.1%
  • RH measurement accuracy: ±2% from 35%RH to 80%RH; ±2.5% from 10%RH to 35%RH and from 80%RH to 90%RH; ±5% elsewhere in range
  • RH response time: < 4 seconds
  • Sampling time: Once per second
  • Display size/type: 8.4 in. x 4.73 in. (214 x 120mm)/7-segment red LEDs
  • Internal data logging memory capacity: 500 pairs of temperature and RH readings
  • Weight: 35.3 oz. (1000g)
  • Power source: #Z110VADPT 110V AC adaptor (included), with "9V" backup battery (included)


  • PC data logging/interface software on CD
  • #Z110VADPT110V AC adaptor
  • Backup battery
  • 1-year limited warranty


  • 10.2 x 7 x 1.9 in. (260 x 178 x 47mm)