AOPH/AOCON Two-Wire / Four-Wire pH / Conductivity Transmitter
- Product description
- Technical specifications
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- AOPH/AOCON Two-Wire / Four-Wire pH / Conductivity Transmitter
I. Measurement Principle
The product drives pH and conductivity electrodes via a dedicated circuit, enabling measurement of medium parameters and local display of numerical readings; it comes standard with a standard current‑transmitter output. The four‑wire version additionally features relay outputs, data communication, and other extended functions, and must be used in conjunction with the corresponding sensing probes.
II. Main Features
Compatible sensor types: pH, ORP, and conductivity electrodes
Two-wire model: Supports HART protocol communication.
Four-wire model: Features transmitter output, alarm output, and data communication capabilities.
Equipped with a backlit LCD display, data is easy to read at a glance.
It can match the temperature compensation signal of the corresponding sensor and features built-in automatic temperature compensation.
High measurement accuracy, fast response time, and excellent data repeatability.
Supports on-site installation operations.
The structure is available in two configurations: integral (with the sensor fully integrated into the device) and split.
Configure the physical operation buttons for convenient parameter settings.
Split‑type structural design ensures easy installation and removal of the sensor.
The entire machine boasts a long and stable service life.
III. Application Scenarios
It is widely used for online monitoring of water quality parameters in applications such as environmental protection and remediation, wastewater treatment, chemical plants, and pharmaceutical manufacturing processes.
IV. Technical Parameters
Project Parameter Details Two-wire system – Sensor pH, ORP, conductivity Two-wire system – Output Two-wire system: 4–20 mA, 24 VDC Two-wire system - Display LCD segment code display Four-wire system – Sensor pH, ORP, conductivity Four-wire system – Output 4–20 mA, relay, RS485 communication, MODBUS RTU Four-wire system - Display LCD dot-matrix display Installation method On-site installation Temperature compensation Support Setting Menu Operations
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