SUP-TDS210-B Conductivity/Hardness/Resistivity Online analyzer, an intelligent Online chemical analyzer, is widely applied for continuous monitoring and measurement of EC value or TDS value or ER value and temperature in the solution in the industry of thermal power, chemical fertilizer, environmental protection, metallurgy, pharmacy, biochemistry, food and water, etc.
The TDS210-B is a professional industrial conductivity controller designed for continuous online monitoring of conductivity (EC), total dissolved solids (TDS), resistivity and solution temperature. It combines a bright 2.8-inch LCD display, isolated 4-20mA transmission output and RS485 Modbus RTU communication in a compact IP54 panel-mount housing. Widely used in thermal power plants, chemical, pharmaceutical, food & beverage and water treatment industries, the TDS210-B delivers stable, repeatable measurements with automatic or manual temperature compensation - making it an ideal conductivity meter for demanding process environments.
Key Features
THREE PARAMETERS, ONE INSTRUMENT
Measures EC, TDS and resistivity with switchable units (µS/cm, mS/cm, ppm, MΩ·cm) - no need for separate instruments.
ISOLATED 4-20mA OUTPUT
Genuinely isolated transmission output (max loop 750Ω, ±0.2%FS) for clean, interference-resistant signals to PLC/DCS.
RS485 MODBUS RTU COMMUNICATION
Standard industrial protocol with configurable address (1-254) and baud rate (2400-19200) for easy SCADA integration.
AUTO & MANUAL TEMP COMPENSATION
Supports NTC10K or Pt1000 sensors over -10°C to 130°C; adjustable temperature coefficient (0.00-0.03) for accurate readings.
IP54 PANEL-MOUNT DESIGN
Compact 100×100mm housing, 92.5×92.5mm cutout, AC220V or DC24V powered with ≤5W consumption - easy to retrofit.
Specification
Display
2.8-inch 128×64 dot-matrix monochrome LCD with backlight
Temperature: -15°C to 65°C; RH: 5% - 95% (non-condensing)
Application
Thermal Power & Boiler Water
Continuous conductivity monitoring of boiler water and condensate to control blowdown and prevent scaling.
Chemical & Fertilizer
Process solution concentration monitoring where conductivity correlates directly with chemical strength.
Metallurgy
Cooling water and process water quality control to protect equipment.
Pharmaceutical & Biochemical
Pure water (PW/WFI) conductivity verification supporting GMP compliance.
Food & Beverage
CIP cleaning solution strength monitoring, product dilution and rinsing water control.
Environmental Protection & Wastewater
Effluent conductivity and TDS monitoring for discharge compliance.
Tap Water / Municipal Water
Distribution network water quality monitoring with remote alarm and data logging via Modbus.
Why Choose US？
Factory Direct
We design and manufacture process instrumentation in-house, so you get better pricing and faster lead times.
Engineered for Reliability
Every TDS210-B is calibrated and tested before shipment.
Responsive Support
English-speaking sales engineers answer your technical questions before and after purchase.
Hassle-Free Warranty
Hardware warranty against material and workmanship defects; 7-day return or replacement on non-customized products.
Export Experience
Trusted by customers across thermal power, water treatment, chemical and food industries worldwide.
FAQ
Q：What parameters can the TDS210-B measure?
The TDS210-B continuously measures conductivity (EC), total dissolved solids (TDS) and resistivity (ER), together with solution temperature. Units can be switched between µS/cm, mS/cm, ppm and MΩ·cm directly on the front panel.
Q：Which electrodes are compatible with this conductivity controller?
Four electrode constants are supported: 0.01, 0.1, 1.0 and 10.0, covering measurements from 0.05 µS/cm (ultra-pure water) up to 20 mS/cm (high-conductivity process streams). Select the electrode constant that matches your measuring range.
Q：Does it support 4-20mA output and RS485 Modbus communication?
Yes. The controller provides a genuinely isolated 4-20mA transmission output (max loop 750Ω, ±0.2%FS) and an isolated RS485 interface with the standard MODBUS-RTU protocol, allowing easy integration with PLC, SCADA or DCS systems.
Q：How does temperature compensation work?
You can choose automatic temperature compensation with NTC10K or Pt1000 sensors, or manual compensation. The compensation range is -10°C to 130°C and the temperature coefficient is adjustable from 0.00 to 0.03 (default 0.02).
Q：What alarm functions does the TDS210-B have?
Two relay channels provide high and low alarms with independent hysteresis settings to prevent repeated alarm triggering. The relay contacts are rated AC250V/3A with both normally open (NO) and normally closed (NC) terminals.
Q：How do I calibrate the TDS210-B?
The controller supports single-point calibration with any standard solution, such as 147.0 µS/cm, 1413 µS/cm or 12.88 mS/cm. First set the temperature compensation mode, place the electrode into the standard solution, wait for the reading to stabilize, then confirm the calibration. A shortcut key enters the calibration interface directly.
Q：Is the controller suitable for outdoor or wet environments?
The TDS210-B is designed for indoor panel mounting with IP54 protection. Avoid direct sunlight, rain, environments above 85% RH, strong vibration and high electromagnetic interference sources.
We use cookies to collect information about how you use this site. We use this information to make the website work as well as possible and improve our services.
