Hanwell - ML4114 Temperature and Humidity Radio Transmitter
Environmental Monitoring Instruments
    Model: ML4114 Temperature and Humidity Radio Transmitter
    Country of Origin: UK
    Use: The ML4114 is a temperature humidity meter typically used for our heritage customers for its discreet design. This reliable transmitter is used with our renowned Hanwell Pro wireless system for 24/7 monitoring and alarm notifications.
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Temperature Humidity Meter

The ML4114 is a temperature humidity meter typically used for our heritage customers for its discreet design. 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 unrivaled) or to discuss your specific temperature monitoring requirements and application.

Instrument Specifications


Dimensions: 110 x 80 x 35 mm
Weight: 200 grams
Power Supply: 3.6V AA Lithium battery
Memory capacity: 100,000 readings

Technical Specification

External Temperature Probe: J140 EE07-02 RH/T probe PT1000 (Tolerance Class A)
(Y421-3 RH remote lead 3 mtrs or Y421-5 RH remote lead 5m) – Probe sold separately
Dimensions: 11.8mm x 83mm
Range: -40°C to +80°C
Accuracy: ±0.1°C at 20°C (see Temperature chart below)
Resolution: 0.1°C


Humidity Probes: Capacitive Polymer
Recommended Range: 0-100%RH non condensing
Accuracy: ±2%RH (0-90%), ±3% (90-100%)
Temperature dependence: < (0.025 + 0.0003 x RH) [%rh-celsius]
Resolution: 0.1% RH

Radio Transmitter FunctionsSignal-strength-message

Frequency Options: A range of frequencies are available between 433-458MHz. Country specific regulations apply.
Radio Power: 10mW
Radio Range: 3km over open ground 
Battery Life: Up to 18 months

This product can be calibrated to your specifications, contact us for further details.
N.B Instrument operating range -20°C to +65°C in a non-condensing RH environment

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