RL4502/9 Differential Pressure radio transmitter

Differential Pressure Wireless Logger

The RL4502 (no display) and RL4509 (LCD display) differential pressure wireless logger units are fitted with a variety of differential pressure ranges. 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.

These products are not available to purchase online due to the radio system requirement, please contact us for information and to discuss the product variable options most suitable to your application:

  1. RL4502-434.075 – DP Radio Transmitter with +/-1250Pa Range
  2. RL4509-434.075 – DP Radio Transmitter with +/-50Pa Range


✓ High performance technology with accurate sensors
✓ 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

• Filter monitoring
• Air ventilation systems


For Instrument specification, please click on the Hanwell Pro RL4502/9 transmitter datasheet.


This product 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 today for more information about this product or other measurement options. Our comprehensive solutions are ideal for centralised monitoring using unrivalled radio telemetry.

Manufactured by Hanwell | Ellab

Relevant articles and differential pressure products:

  • Centralised monitoring with EMS – click here to read more
  • View our other differential pressure products – click here
  • Hanwell Pro technology chosen by world-class medical facility – click here to read article