Hanna pH Mini Controller with Analog Output - BL931700

Hanna BL931700 pH Mini Controller is a highly precise and reliable solution designed for accurate pH regulation in industrial, laboratory, and water treatment applications. Engineered for performance in compact spaces, this controller delivers consistent monitoring and control with a wide pH range of 0.00 to 14.00, offering fine resolution of 0.01 pH and high accuracy of ±0.02 pH. Its high impedance input of 10¹² Ohm ensures seamless compatibility with all standard pH electrodes equipped with BNC connectors, making integration simple and efficient across various systems.

The controller features a flexible dosing system with both manual and automatic operation modes, allowing users to tailor control based on process requirements. An adjustable dosing relay supports activation above or below the defined setpoint, along with over-dosing protection adjustable between 5 to 30 minutes for enhanced operational safety. The inclusion of a robust 4–20 mA analog output signal, accurate to ±0.20 mA with a maximum load of 500 Ω, enables smooth connectivity with external control and monitoring systems, ensuring better process automation and control.

Designed with user convenience in mind, the BL931700 includes a large and clear LCD display for real-time monitoring of pH values and system status. It also offers manual two-point calibration through offset and slope trimmers, allowing users to maintain long-term measurement reliability and accuracy. The dosing relay is rated up to 2A at 250VAC or 30VDC and is fuse-protected for dependable and safe operation.

Built to withstand demanding environments, the controller is housed in a durable fire-retardant casing that enhances safety during operation, particularly in industrial and chemical processing settings. Its compact dimensions of 83 x 53 x 99 mm and lightweight design make it easy to install in control panels, field setups, or laboratory environments with limited space. Available in both 12VDC and 115/230VAC power supply options, it provides flexibility for diverse installation needs.

Ideal for applications such as water and wastewater treatment, chemical processing, laboratory dosing, aquaculture, and industrial process control, this controller ensures reliable pH monitoring and dosing performance. pH Controller