DL-RHTX Temperature and Humidity Data Logger

DL-RHTX Temperature and Humidity Data Logger

DL-RHTA Datalogger

DL-RHTA Feedback Datalogger

Infrared surface thermometer

Infrared Surface Thermometer IRT2DP

DL-RHTX Temperature and Humidity Data Logger

The Tramex DL-RHTX Feedback Temperature and Humidity Data Logger is capable of long-term monitoring of air temperature and relative humidity through its internal sensors. It has an air temperature measurement range of -40˚C to 125˚C and a relative humidity range of 0 to 100% RH

In stock
Grouped product items
Product Name Qty
Feedback Starter Kit (Includes 1 Higro i2 Probe)
Feedback EZ Kit (Includes 5 Higro i2 Probe)

The New DL-RHTX Feedback Data Logger and App from Tramex has been designed and developed for professionals who depend on reliable and accurate readings using the very best technology  and performing BS-8201, 8203, 5325 and ASTM F2170.

With a large internal memory it means that the Feedback DataLogger and App can log up to 100,000 data point entries for relative humidity, temperature, dew point and grains per pound, transmitted wirelessly via Bluetooth BLE technology to your mobile device.

On the App you can visualize Live Readings, Thermal Conditions and Psychrometric Charts, as well as creating and exporting spreadsheets, charts and reports. The Tramex Feedback DataLogger requires the Tramex Feedback Data Logger App and a compatible iOS or Android mobile device.

It is possible to view realtime readings from the Tramex DL-RHTX on a smartphone screen via the Tramex Feedback App as well as accessing archived data from each connected device. Readings are available in numerical readouts or as part of a thermal condition graph and it is also possible to view information as a psychrometric chart. It is possible to save information in a spreadsheet and there are multiple reporting and exporting functions.

Key Features

  • Air temperature range: -40˚C to 125˚C
  • Humidity range: 0 to 100% RH
  • Contact temperature range: -30˚C to 80˚C
  • Internal memory: 100,000 data points
  • Bluetooth connectivity over 50m
  • Connects to Tramex Feedback DataLogger App
  • View realtime readings and psychrometric charts
  • Multiple calculation and analysis features
  • Select kit with 2 or 5 Hygro-i2 probes

Supported Measurements:

Ambient Relative Humidity, Temperature, Dewpoint, Grams per kilo.
In Situ Relative Humidity, Temperature, Dewpoint, Grams per kilo (with optional plug-in RH Probe)

Contact Temperature, Estimated contact RH, Ambient Dew Point, Contact Delta Temperature (with optional contact Temperature Probe) Psychrometric chart showing Relative Humidity, Specific Volume, Wet Bulb Temperature, Dry Bulb Temperature, Enthalpy, Humidity Ratio, Dew Point.


  • Size: 100mm x 90mm x 35mm (3.94” x 3.54” x 1.38”)
  • Weight: 100g (3.53oz)
  • Construction: ABS enclosure
  • Power: 1 x AA type battery 1.5 Volt
  • Memory: 100,000 data point entries (samples of Ambient RH and temperature; Surface Temperature)
  • Logging Rate: Logger interval adjustable between 5 minutes and 1 hour 
  • Transmission Range: Up to 50m (165ft) line-of-sight 
  • Bluetooth: BLE Bluetooth Low Energy 4.2 compliant, Bluetooth 5 advertising 
  • Included: Wall Mounting and Tripod Stand


  • Range: 0 to 100%
  • Accuracy: ±1.5%RH Range 0% to 80%RH ±2.0%RH Range 80% to 99%RH (@ 25oC (77oF))
  • Resolution: 0.1% over the complete range 
  • Drift: <0.25%RH per year

Air Temperature

  • Range: -40oC to 125oC (-40oF to 257oF)
  • Accuracy: ±0.1 °C Range 20°C to 60°C; (±0.1oF Range 68oF to 140oF)
  • Sensor protection: PTFE Film protects sensor opening from water & dust 
  • Drift: < 0.03oC (0.04oF) per year

Contact Temperature Probe (Optional)

  • Units: oC (oF)
  • Temperature Range: -30°C to +80°C ( -20°F to +175°F)
  • Accuracy: ±0.5°C from -10°C to +85°C; ( ±0.9oF from 14oF to 185oF)
  • Resolution: 0.1% over the complete range


  • Power supply: 1 x AA type battery 1.5 Volt
  • Battery life: Over 1 year based on logging intervals of 5mins, using an alkaline battery with a nominal voltage of 1.5V as supplied.


  • CE: EN 61326-1 
  • FCC: Part 15-J ROHS Compliant

Kit Options Available:

1) Feedback starter kit: includes Feedback dater logger, 1 x Hygroi2 probe, conecter cable, tripod, hardshell case & quick guide

2) Feedback EZ kit: includes Feedback dater logger, 5 x Hygroi2 probe, conecter cable, tripod, hardshell case & quick guide