ABB 400-AX 4-line conductivity transmitter

1. Product Overview

The ABB 400-AX 4-line Conductivity Transmitter is a high-precision industrial conductivity measurement device for continuous monitoring of the electrical conductivity of liquids. It is suitable for pure water, process water, chemical solutions, and industrial liquids. The 4-line design minimizes transmission errors, providing accurate measurement. The 400-AX supports multiple output signals, including 4–20 mA, voltage, and optional HART protocol, enabling integration with PLC, DCS, or SCADA systems for automated process control and remote monitoring.

2. Technical Specifications

• Model: 400-AX

• Type: 4-line Conductivity Transmitter

• Measurement Range: 0–200 µS/cm to 0–2000 mS/cm (depending on electrode configuration)

• Output Signals: 4–20 mA DC, optional HART protocol

• Supply Voltage: 24 V DC

• Accuracy: ±0.5% FS

• Response Time: < 1 s

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -20°C to +70°C

• Process Connection: Standard threaded or flange mount (optional)

• Protection Rating: IP65

• Mounting: Panel or pipe mount

• Dimensions (W×H×D): ~140 × 200 × 100 mm

• Weight: ~1.2 kg

3. Advantages and Features

• High-precision measurement: 4-line design reduces wire resistance errors for accurate conductivity measurement.

• Fast response: Short response time for real-time liquid conductivity monitoring.

• Multiple signal outputs: Supports 4–20 mA, voltage, and HART protocol for system integration and remote monitoring.

• Industrial durability: IP65 protection suitable for humid, dusty, and industrial environments.

• Flexible installation: Supports panel, pipe, and flange mounting for easy field deployment and maintenance.

4. Typical Applications

• Industrial water treatment and pure water monitoring

• Chemical production process liquid conductivity measurement

• Cooling water and boiler water conductivity monitoring

• HVAC systems and industrial automation process monitoring

• Industrial liquid monitoring and alarm systems

5. Installation & Usage Notes

• Ensure supply voltage is 24 V DC and meets specifications before installation.

• Keep electrodes and wiring clean to avoid conductivity contamination.

• Install in a dry, ventilated environment to prevent dust and liquid ingress.

• Maintain operating temperature between 0°C and +60°C.

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The structure and details of the product： ​

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