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4-20mA input for pump, machine, level and door alerts

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Live data

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Compatible with EMS

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Hanwell Pro RL4809 Wireless Transmitter

4-20mA input unit

Part of the Hanwell Pro series of wireless transmitters, this unit is a 4-20mA logger with dual 4-20mA input for use internally or externally.

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Key Features and Benefits


Up to 18 months battery life


50,000 data readings per channel


Superior performance hardware & high accuracy sensors


Easily accessible battery


Low power radio for long distance transmission (3km over open ground)


Complies with RoHS, EU & WEEE directives


Carries CE Marking

Instrument Specifications:

Dimension (Excl. ancillaries):

110 x 80 x 35mm


200 grams

Power supply:

3.6V AA Lithium battery

Cable length:

3m with bare ends

Case material:


Memory capacity:

50,000 readings (unit will wrap when full)

Clock accuracy (logging):

20 ppm at 25°C

Instrument operating range:

-20°C to +65°C (non-condensing RH environment)

Storage Temperature:

-40°C to +60°C

IP Rating:



Dual channel 4 to 20mA

Input impedance:

100 ohms

Measuring frequency:

Every transmit/log interval

Transmit interval:

User programmable 30s-300s





Radio Transmitter functions

Frequency options:

A range of frequencies are available between 433-458MHz. Country specific regulations apply.

Radio power:


Radio range:

3km over open ground

Software required:

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

Hardware required:

SR2 – Smart Receiver
REP – Repeater

The Hanwell EMS Software

The Hanwell environmental monitoring software (EMS) can be used with Hanwell Pro and Hanwell IceSpy hardware to provide a secure and flexible tool for comprehensive data collection, analysis and immediate alarm notification.

Validatable software
Specifically for the pharmaceutical sectors, we provide comprehensive IQ and OQ protocols and custom protocols, where required. Trained engineers and distributors are available for smooth validation protocol execution.

EMS assists with national regulatory compliance requirements
GxP Guidelines, HACCP, FDA 21 CFR Part 11, EU GMP Annex 11, and ISO 22000 food standards

Highlighted Features

checkmark One software platform for all Hanwell equipment
checkmark Single or multi-user access for small, medium or large monitoring needs.
checkmark Collect and display data from multiple environmental applications.
checkmark Display quick overview of sites and/or sensor groups specified by individual users.
checkmark Access interactive graphs, tables and plan views for detailed data analysis.
checkmark System validation to organisation requirements with full supporting IQ & OQ protocols.
checkmark View real-time data 24/7.
checkmark Immediate system, email and SMS alarm notification to user-defined personnel.
checkmark Generate automated reports or access data immediately and easily via the system.
checkmark Access critical information on your local PC, via the company intranet or network and via the internet.
checkmark View and interact with data and settings from anywhere in the world using commercially available browser based formats.
Learn more about Hanwell EMS
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Suitable Applications

The wireless data loggers can be used for various applications within the life science, medical and food & beverage industries.

Ellab Applications

Ellab provides a wide range of diverse products and solutions for most applications, all around the world.

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Suitable Accessories

Ellab offers a wide range of customizable fittings and essential accessories for our products. The items below are for use with this product:

Ellab Accessories

Ellab offers a wide range of customizable fittings and essential accessories for processes and studies within different industries.

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