Hanna TDS Mini Controller (0.00 to 19.99 ppm) - BL983321-115/230VAC

The BL983321-115/230VAC Mini TDS Controller is a precision panel mounted process controller designed for industrial and laboratory monitoring of total dissolved solids (TDS) in the 0.00 to 19.99 ppm (mg/L) range. This compact unit features a large LCD protected by a cover, supporting both automatic and manual dosing modes. The built-in relay can be used to activate process valves or dosing systems in accordance with the measured set point, ensuring optimal control of water quality.

• Measurement range: 0.00 to 19.99 ppm (mg/L) TDS, resolution to 0.01 ppm.
• Automatic temperature compensation from 5 to 50°C with β = 2%/°C provides stable readings in variable environments.
• EC to TDS conversion factor of 0.5, equating 1.00 µS/cm to 0.50 ppm.
• Relay: maximum 2A, 250V AC or 30V DC (fuse protected), enabling flexible process integration.
• User-adjustable dosing set point (0–19.99 mg/L), calibration (manual with CAL trimmer), and over-dosing control timer (5 to ~30 min).
• Power supply: 115/230 VAC, 50/60 Hz for panel-mount industrial applications.
• Typical weight: 300 g (models “-1”).
• Compact dimensions: 83 × 53 × 99 mm (3.3 × 2.1 × 3.9 in) for easy integration.
• Ideal for industrial, laboratory, manufacturing, water treatment, and quality control use.

This controller is commonly used in DI water polishing, ion exchange, RO, and distillation systems, enabling real-time quality monitoring and precise process dosing based on TDS levels. It helps prevent scaling, optimizes deionizer switching, and automates water quality correction in manufacturing and research settings.

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