RS485 Modbus RTU Conductivity Analyzer IP66 Panel Mount Online Conductivity Controller with Two SPST Relays

The AEC1-T1 T2 online conductivity controller brings plant-floor conductivity measurement . Equipped with an RS485 interface supporting the standard Modbus RTU protocol, it reports temperature, conductivity, resistivity, TDS and salinity values to PLCs, SCADA systems, data loggers using a clearly documented register map.

The instrument acts as a Modbus slave with a default address of 1 and default communication settings of 9600-8-N-1, both configurable from the communication settings menu. Hosts can read measurements using function code 04, with temperature, conductivity, resistivity, TDS and salinity mapped to fixed register addresses in 32-bit floating point (CDAB) format. In addition to the digital link, two active 4~20mA outputs (max. load 1000 Ω) mirror the measured value and temperature for legacy analog loops, and two SPST relays enable direct control of pumps, valves and alarms.

Built for continuous duty, the controller supports the full 4-in-1 measurement set, NTC10K/PT1000 automatic or manual temperature compensation, and a 3.2 inch graphic LCD. Its IP66 panel-mount housing and power-failure protection make it a dependable node for municipal and industrial water quality monitoring.

1. Native Modbus RTU support: standard RS485 slave interface with a fully documented register map for fast integration.
2. All key values on the bus: temperature, conductivity, resistivity, TDS and salinity readable by function code 04.
3. Dual active analog outputs: 4~20mA or 0~20mA, max. load 1000 Ω, assignable across the measured channels.
4. Two SPST control relays: 3A 250V AC for pumps, valves and alarms — no extra controller required.
5. Configurable communication: slave address and baud settings adjustable from the communication menu.
6. High accuracy measurement: 0~20 mS/cm range at ±1% FS with NTC10K/PT1000 temperature compensation.
7. Rugged and reliable: IP66 panel-mount housing with power-failure protection retaining parameters indefinitely.

• SCADA and PLC-based water treatment monitoring
• Municipal drinking water and wastewater
• Industrial process water and rinse-water control
• Pure water and RO/DI plant supervision
• Cooling tower and boiler water management
• Environmental monitoring and remote data logging