Pro RL4001/2 Temperature transmitter -40°C to +60°C

Wireless thermistor data logger

Part of the RL4000T Series, the RL4001 (single channel) and RL4002 (dual channel)  are ideal for use as an accurate wireless data logger with LCD display and 434.075MHz frequency. This reliable transmitter is used with our renowned Hanwell Pro wireless system for 24/7 monitoring and alarm notifications. Contact us today for your free quotation and signal strength test (we can prove ours to be unrivalled) or to discuss your specific temperature monitoring requirements and application.


✓ Single/Dual Channel Thermistor data logger
✓ LCD display with data readings & 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

• Fridges
• Freezers
• Chillers

Transmitter options:

  1. RL4002-434.075 – RL4002 Wireless thermistor data logger with two channels
  2. RL4001-434.075 – RL4001 Wireless thermistor data logger with one channel


For Instrument specification, please click on the Hanwell Pro RL4001/2 transmitter datasheet.


This wireless thermometer is to be used in conjunction with 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 for more information about our wireless thermometer options, alternatively, click here to see our full range.

Manufactured by Hanwell | Ellab