Hanna BL932700 | ORP Mini Controller with 4–20 mA Output

The Hanna BL932700 ORP Mini Controller is built for continuous oxidation-reduction potential control in water treatment and disinfection systems. It is suitable for swimming pools, cooling towers, wastewater treatment, ozone dosing, chlorine dosing, chemical oxidation, and industrial sanitation processes.

This compact panel-mounted controller measures ORP from -1000 to +1000 mV with 1 mV resolution. The adjustable setpoint enables automated dosing of oxidants or reductants via a relay output, helping maintain stable disinfection or process oxidation levels. Its 4–20 mA analogue output supports connection with PLCs, chart recorders, and monitoring devices.

For Pakistani industries, the BL932700 is useful for commercial pool systems, beverage water disinfection, cooling tower treatment, ETP operation, and ozone/chlorine dosing panels. Kamadi supplies Hanna ORP controllers for reliable process monitoring and automated chemical control.

Key Features

• Compact panel-mounted ORP controller
  
• Measures ORP from -1000 to +1000 mV
  
• 1 mV resolution for process monitoring
  
• Selectable oxidant or reductant dosing
  
• Adjustable dosing setpoint
  
• 4–20 mA analogue output for PLC or recorder connection
  
• Suitable for disinfection and oxidation control
  

Technical Specifications

• Parameter: ORP / Redox
  
• ORP Range: ±1000 mV
  
• ORP Resolution: 1 mV
  
• ORP Accuracy: ±5 mV at 25°C
  
• Calibration: Manual with CAL trimmer
  
• Setpoint Range: -1000 to +1000 mV
  
• Dosing Selection: Oxidizing or reducing, selectable
  
• Dosing Relay: Maximum 2A fuse-protected relay; 250 VAC / 30 VDC
  
• Overtime Protection: Adjustable, typically 5 to 30 minutes
  
• Input Impedance: 10¹² ohm
  
• Analog Output: 4–20 mA, approx. ±0.20 mA accuracy, 500 Ω maximum load
  
• Electrode Connection: Standard BNC ORP electrode input
  
• Installation Type: Panel-mounted mini controller

Applications

• Swimming pool ORP control
  
• Chlorine dosing systems
  
• Ozone water treatment
  
• Cooling tower disinfection
  
• Wastewater oxidation control
  
• Industrial sanitation monitoring