AWT440

Multi-channel digital transmitter

The AWT440 transmitter has now been replaced by ABB’s new AWT424 multi-input transmitter.

As of July 2026, the AWT440 has moved to Limited life cycle status and is no longer available to purchase for new installations.  Service and spare part availability continue to be offered.

For further information on the AWT424 please visit: https://new.abb.com/products/measurement-products/analytical/continuous-water-analysis/transmitters/awt424-multi-input-transmitter

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Drawings: 3D views and STEP files

Download detailed views and STEP files for direct import into your system schematic
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Movie: ADS430 optical dissolved oxygen system

Discover why users are saying this EPA approved DO system is the easiest to use and maintain system on the market.
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White paper: Optimizing dissolved oxygen measurement

Learn how the latest advances in dissolved oxygen sensor technology are delivering enhanced levels of accuracy and reliability.
Overview
Data
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Overview

Users of the AWT440 benefit from plug-and-play connectivity, automatic sensor recognition and set-up. 
Enabling:
    – Automatic connection of up to 4 digital sensor
    – Intuitive software with full colour graphical display
    – Data logging and graphical process trending
    – Full audit trail capability 
    – Secure data archiving to SD Card or USB Stick
    – Ethernet, Profibus or MODBUS communications

Data

  • Operation
    – Language
    English, German, French, Italian, Spanish
    – No. of inputs
    Up to 4 sensors
  • Mechanical data
    – Protection
    IP66 / NEMA 4X
    – Dimensions
    194 mm (7.64 in.) x 214 mm (8.42 in.) x 98 mm (3.85 in.)
    Weight – 1.5 kg (3.3 lb)
  • Materials of construction
    Glass-filled polycarbonate
  • Electrical
    – Power supply ranges
    – 100 to 240 V AC ±10 %, 50 / 60 Hz
    – Power consumption
    <30W
    – Analog outputs
    2 standard + 2 optional
    – Relay outputs
    4 standard + 2 optional
  • Digital inputs / outputs
    – 6 standard, user-programmable as input or output
  • Connectivity / Communications (optional)
    – Ethernet
    – Profibus (DPV1)
    – MODBUS (RTU RS485)​​

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