ABB AWT420-400 General Purpose Four-Wire Dual-Input Transmitter

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ABB AWT420-400 General Purpose Four-Wire Dual-Input Transmitter

1. Product Description & Technical Specifications

Model: AWT420-400
Type: Four-wire dual-input process transmitter
Function:
The ABB AWT420-400 is a high-performance, multi-parameter process transmitter designed to handle dual-channel measurement. It supports pH, ORP, conductivity, resistivity, dissolved oxygen, and other water-quality parameters. With excellent stability and EMC resistance, it is ideal for industrial and water-treatment monitoring applications.

Technical Specifications (Typical):

• Input Channels: Dual input (configurable for pH / ORP / conductivity / resistivity / dissolved oxygen, etc.)

• Power Supply: Four-wire AC / DC

• Measurement Accuracy: ±0.1% (sensor-dependent)

• Display: Large backlit LCD with multi-screen interface

• Output Signals:

  • 2 × 4–20 mA analog outputs

  • Optional digital communication such as HART

• Relay Outputs: Multiple programmable relays

• Operating Temperature: –20°C to +55°C

• Protection Rating: IP65 / IP67 (depending on enclosure type)

• Mounting: Panel, wall, or pipe mounting

• Data Logging: Built-in data logger and trending display

2. Advantages & Key Features

1. Dual-channel capability
   Supports two independent measurement inputs, reducing installation cost.

2. High compatibility
   Works with various ABB sensors for different process requirements.

3. User-friendly interface
   Large backlit LCD and intuitive menu structure.

4. Excellent EMC performance
   Ensures stable measurements under harsh industrial conditions.

5. Flexible outputs
   Multiple analog and digital communication options for easy integration.

6. Industrial durability
   Designed for long-term continuous operation.

3. Typical Applications

• Municipal and industrial water treatment

• Wastewater treatment online monitoring

• Boiler feedwater and cooling systems

• Chemical process industry monitoring

• Food & beverage industry water quality control

• Pharmaceutical ultrapure water systems

• Environmental monitoring

4. Precautions

1. Disconnect power before installation or wiring.

2. Use matched sensors to ensure measurement accuracy.

3. Calibrate sensors regularly based on process conditions.

4. Avoid installing near strong electromagnetic interference sources.

5. Keep enclosure sealed to protect against moisture and dust.

6. Configure outputs properly according to system requirements.

The structure and details of the product：

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