Humidity & Temperature Gauge DM650HM

The DM650HM is a battery-powered digital humidity and temperature gauge that displays relative humidity, temperature, dew point, and delta temperature on a 6-digit LCD screen. Its advanced display mode can also show one or two custom 32-character messages, with the ability to split a process range into eight user-set bands, each with its own message, making it easy to communicate status at a glance in BMS, food storage, or environmental monitoring applications.

A single volt-free changeover relay can be configured for high, low, or deviation alarms on any of the four measured values, with a battery-monitoring function built in. The DM650HM’s data logging function records up to 5000 time and date-stamped points including %RH, temperature, and relay state, readable either via USB to a text file or via NFC to a free Android app that can graph and forward the data by email or Bluetooth. Wall and duct-mounted versions are both available.

  • 4-in-1 Measurement — Displays relative humidity, temperature, dew point, and delta temperature.
  • Custom Messaging — Displays 1-2 custom 32-character messages, with up to eight user-set process bands.
  • Configurable Alarm Relay — Single changeover relay for high, low, or deviation alarms on any measured value.
  • 5000-Point Data Logger — Time-stamped logs of %RH, temperature, and relay state via USB or NFC.
  • NFC Android App — Graph and forward logged data by email or Bluetooth from a compatible Android device.
  • Wall or Duct Mount — Available in wall-mounted or duct-mounted versions.

What does the DM650HM measure?

It measures and displays relative humidity, temperature, dew point, and delta temperature on a 6-digit LCD.

Can the DM650HM trigger an alarm?

Yes, its changeover relay can be configured for a high, low, or deviation alarm on any of the four measured values.

How much data can the DM650HM log?

Up to 5000 time and date-stamped points, including %RH, temperature, and relay state.

Is the DM650HM available for duct mounting?

Yes, both wall-mounted and duct-mounted versions are available.