Large LED Temperature/Humidity Monitor (with Data Logging Option)

Product Code: HTM-185/HTM-185D

The large, easy to read real-time display of the HTM-185/185D makes it an ideal temperature/humidity monitor for controlled environments and other critical areas. The display features an external 100mm length temperature/humidity sensor and can be wall mounted with the supplied mounting kit. Audible high/low alarms for both temperature and humidity can easily be set using the buttons on the front of the display and the standard audio output connector can be used to relay the audio elsewhere (e.g. to external speakers), if required.

The HTM-185D model also incorporates a data logger that is capable of logging up to 30,000 records. Logged data can be downloaded to the software in real-time via the mini USB port on the side of the display. Downloaded data can then be saved, graphed etc.

Both models are supplied with a user manual, power adaptor and wall-mounting kit. The HTM-185D model is also supplied with a software CD and USB cable.


Warehouse, chamber/incubator, laboratory, electronics manufacturing, hospital blood/tissue banks, computer rooms, clean rooms, refrigerators, defence, other critical areas.

  • Features
  • Technical
  • Documents
  • Software
    • Monitors temperature and humidity
    • Complete environmental monitoring and alarm solution
    • Real-time data display
    • Large double-row LED display for easy reading
    • Temperature max reading 1999, humidity max reading 999
    • Wall mountable
    • High and low temperature/humidity alarms
    • Data logging with USB for 30,000 records (HTM-185D only)
    • °C/°F selectable
    • Data hold function
    • Low battery warning light
    • Audio output
    • Compact size (260mm x 178mm x 47mm)
  • Technical Details
    Model  HTM-185: without data logger module
    HTM-185D: with data logger module
    Temperature Sensor Type Diode
    Temperature Range -20°C to +60°C (-4°F to +140°F)
    Temperature Accuracy ±1.0°C (±1.8°F) (-5°C to +40°C / +23°F to +104°F), Other: ±2.0°C (±3.6°F)
    Temperature Resolution 0.1°C (0.1°F)
    Temperature Update Rate 1 times/second
    Temperature MAX Reading 1999 
    Relative Humidity Sensor Type Capacitor
    Relative Humidity Range 5% to 95%
    Relative Humidity Accuracy ±2.5%RH (at 25°C, 20% to 80%RH), Other: ±5.0%RH (at 25°C, < 20%RH, > 80%RH)
    Relative Humidity Resolution 0.1%RH
    Relative Humidity Response Time Below 4 seconds
    Relative Humidity MAX Reading   999 
    Operating Temperature/Humidity -20°C to +60°C (-4°F to +140°F), < 95%RH (non-condensing)
    Storage Temperature/Humidity -10°C to +60°C (+14°F to +140°F), < 70%RH (non-condensing)
    LED Display 214mm x 120mm (8.4 inches x 4.73 inches)
    Power Supply AC to DC Adapter (9~12V / 1A)
    Battery Backup DC 9V battery enables continued recording without display during power disruption for an hour only
    Dimensions 260mm (L) x 178mm (H) x 47mm (D) (excludes sensor length 100mm)
    Weight 1000g
  • No software available