GLI Pro Series

🧪 What This Data Means — For Quick Client Selection

  • Ultra-wide measurement range (µS/cm to thousands of mS/cm) makes GLI Pro suitable for both ultrapure water and highly conductive industrial streams, reducing the need for multiple analyzers.

  • Advanced temperature algorithms (NaCl/KCl/natural water curves) deliver accurate results across varying process temperatures—ideal for RO permeate, boiler water, and pharma utilities.

  • Digital GLI sensors ensure noise-free signals over long cable distances, important for large plants, RO skids, and ETP installations.

  • Multiple communication options (Modbus, Profibus, HART) ensure smooth integration with modern PLC/SCADA and DCS systems in industrial process plants.

  • High-temperature rating (up to 200 °C with specific sensors) makes it suitable for power plants, condensate return, and high-temperature chemical processes where typical conductivity probes fail.

  • Fast digital response improves control in dosing, neutralization, continuous RO monitoring, and chemical feed loops.

  • Up to 4 relays allow direct pump/valve control—helpful for standalone ETP/STP operations and automated RO reject/divert control.

Description

 Hach GLI Pro is a high-precision conductivity/TDS measurement system built for demanding industrial water applications. It features advanced digital signal processing, rugged GLI conductivity sensors, real-time temperature compensation, and superior measurement stability. Ideal for ultrapure water, RO/DM plants, power utilities, chemical processes, and wastewater treatment.

🔧 HACH GLI Pro — Key Technical Data & Selection Parameters

Parameter Specification / Details
Measurement Range 0.055 µS/cm to 2,000 mS/cm (depends on sensor)
TDS Range Programmable factor 0.30–1.00
Sensor Type GLI 6-series digital conductivity sensors
Cell Constants 0.01 / 0.1 / 1.0 / 10.0
Temperature Compensation Automatic (NaCl, KCl, natural water algorithms)
Process Temperature –20 °C to +200 °C (sensor-specific)
Accuracy ±0.5% of reading (high-accuracy mode available)
Response Time Fast DSP-based measurement
Outputs Dual 4–20 mA isolated
Communication MODBUS, PROFIBUS, HART (depending on module)
Relays Up to 4 programmable alarms
Display High-contrast multi-line LCD
Power Supply 24 VDC / 100–240 VAC
Enclosure NEMA 4X / IP65 field mount
Calibration Auto/manual — 1 or 2 point
Typical Applications RO/DM, ultrapure water, boilers, EDI, pharma, semiconductor, cooling water, ETP/STP

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