Hanna pH Mini Controller with Analog Output - BL931700

The BL931700 is a compact single setpoint pH controller designed for applications where space and cost are important. Its adjustable dosing relay can be configured to dose above or below a defined pH setpoint. Users can select between automatic and manual dosing modes, allowing easy maintenance and troubleshooting. The device features a high impedance pH input and is compatible with any pH electrode equipped with a standard BNC connector.

Hanna BL931700 pH Mini Controller is designed for accurate and reliable pH monitoring and control in industrial, laboratory, and water treatment applications. It measures across a wide pH range of 0.00 to 14.00 with a resolution of 0.01 pH and high accuracy of ±0.02 pH, ensuring precise control in critical processes.

The controller includes flexible dosing functionality with both manual and automatic operation modes, allowing users to adjust system behavior based on application needs. The dosing relay can be set to activate above or below the selected setpoint and includes over-dosing protection adjustable between 5 to 30 minutes for enhanced operational safety.

It features a high impedance input of 10¹² Ohm, ensuring compatibility with standard pH electrodes using BNC connectors. A 4–20 mA analog output enables seamless integration with external monitoring and control systems for efficient process automation.

The large LCD display provides clear and real-time visibility of pH values and system status. Manual two-point calibration using offset and slope trimmers allows users to maintain measurement accuracy over time. The relay is rated up to 2A and is fuse-protected for safe operation.

The controller is housed in a fire-retardant casing for enhanced safety in industrial environments, while its compact size of 83 x 53 x 99 mm allows easy installation in control panels and field setups. It is available in multiple power supply options, offering flexibility for different installation requirements.

This controller is widely used in water and wastewater treatment, chemical processing, laboratory dosing, aquaculture, and industrial process control applications. Explore laboratory and industrial measurement instruments and pH Controllers for accurate and efficient process control solutions.