ML4108 RH/T and External Thermistor Radio Transmitter

ML4108 RH/T and External Thermistor Radio Transmitter

Product code: ML4108-434.075

Part of the Hanwell Pro ML4000RHT Series, the ML4108 RH/T radio transmitter has fitted onboard RHT sensor and optional remote surface temperature probe.

Instrument temperature measuring range: -20°C to +60°C which is extended to 0°C to +125°C with external probes | Humidity range: 10-90%RH non-condensing

External Probes are available separately – see below for compatible probes

ML4108 Transmitter Datasheet

Wireless surface temperature logger with RH

The ML4108 is a wireless surface temperature logger with RH sensor. The accurate remote surface temperature sensor is optional for extended temperature range. This is ideal for monitoring surfaces such as floors.


✓ Combined temperature & humidity measurement
✓ LCD display with 33,333 data readings per channel & up to 2 years battery life
✓ Superior performance hardware & high accuracy sensors
✓ Easily accessible battery & USB socket
✓ Low power radio for long distance transmission (3km over open ground)
✓ Complies with RoHS, EU & WEEE directives
✓ Carries CE Marking

Typical Applications

• Historical building surface temperatures
• Ambient room conditions
• Stored collections


For Instrument specification, please click on the Hanwell Pro ML4108 wireless surface temperature logger with RH datasheet.


This product is to be used in conjunction with HanLog software or the Hanwell EMS software for comprehensive centralised monitoring.

Compatible products

Software Required:
W900 – Standard Hanwell EMS Software Package
W906 – Validated Hanwell EMS Software Package
*See EMS datasheet for further options

Hardware Required:
SR2 – Smart Receiver
CR2 – Controller
REP – Repeater

Y119 – Wall mounting bracket
88706 – AA Lithium battery

Contact us to discuss your specific application, our friendly staff would be happy to help.

Manufactured by Hanwell | Ellab