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Analytical Instrument pH & Conductivity (TDS) Controller

Industrial online water quality analyzer with dual relay alarm control, isolated 4-20mA DC outputs, RS485 Modbus, and automated temperature compensation for ETP, STP, RO plants, and process lines.

DUAL RELAY CONTROL RS485 MODBUS RTU AUTO TEMPERATURE ATC Pt100

Industrial Online pH / Conductivity / TDS Controller

KBN Solutions provides a wide range of analytical instruments engineered specifically for demanding industrial water treatment. We supply custom sensor housings (submersible immersion probes and in-line flow-through tee cells) that enable convenient, secure mounting and easy electrode maintenance.

Equipped with high-performance glass/polymer combination pH electrodes and 2-electrode / 4-electrode conductivity cells, this instrument continuously displays real-time readings on a bright backlit LCD screen while activating chemical dosing relays or transmitting data to SCADA / PLC / CPCB environmental clouds.

pH Measurement Range 0.00 to 14.00 pH (±0.02 pH)
Conductivity / TDS Range 0.05 µS/cm to 200 mS/cm / ppm
Dosing Control Relays 2x High/Low Setpoints (5A/250V)
Data Communication Isolated 4-20mA & RS485 Modbus

Technical Specifications & Parameters

Includes Certified Calibration Standards
Parameter Technical Specification Value
Operating Mode Continuous online liquid analysis for pH, ORP, Conductivity, TDS, and Temperature
pH Range & Resolution 0.00 to 14.00 pH | Resolution: 0.01 pH | Accuracy: ±0.02 pH ±1 digit
Conductivity Range 0.05 µS/cm to 200 mS/cm (Auto-ranging cell constant K=0.01, 0.1, 1.0, 10.0)
TDS Range 0.00 ppm to 100,000 ppm (adjustable conversion factor 0.40 to 1.00)
Temperature Compensation Automatic (ATC) via Pt100 / Pt1000 RTD sensor (Range: -10.0°C to +120.0°C)
Display Interface High-contrast backlit LCD showing primary parameter, temperature, and relay statuses
Analog Output Optically isolated 4-20mA DC current loop (Max load 500Ω)
Digital Communication RS485 Modbus RTU protocol for PLC, SCADA, or cloud telemetry integration
Control Relay Contacts 2x SPDT mechanical relays (5A/250VAC) with programmable high/low hysteresis delay
Sensor Mounting Hardware 3/4" NPT immersion probe holder / In-line flow cell with bypass valves
Power Supply 90 - 260V AC, 50/60 Hz (Optional 24V DC model available)
Enclosure Rating IP65 Weatherproof panel mount (96x96 mm standard DIN cutout) or wall mount
High Stability Glass Electrodes

Resistant to organic fouling and poisoning with solid polymer gel electrolyte and annular PTFE junction.

Automated Dosing Relay Control

Directly drives chemical metering dosing pumps (acid, base, coagulant) with programmable setpoint hysteresis.

CPCB Online Monitoring Ready

RS485 Modbus output allows direct connection to environmental telemetry loggers for CPCB server data transmission.

Need Complete Analytical Panel Assembly for ETP or RO?

We assemble complete pre-piped and pre-wired water quality analyzer panels with flow cells, isolation valves, and dosing pump control for immediate commissioning.