Black Stone BL 7916 pH control and pump system: intelligent pH control in a robust housing
The Black Stone BL 7916 pH controller and pump is an all-in-one solution designed to automate and secure pH control in industrial and laboratory processes. Manufactured by Hanna Instruments, this system combines continuous pH measurement with an integrated proportional dosing system, ensuring precise and constant adjustment of the desired pH level without manual intervention.
Two variants are available in this range: the BL 7916D model, designed for a 230 V power supply, and the BL 7916U model, designed for a 115 V power supply. Apart from this difference in power supply voltage, the two models are identical in all technical and functional respects, offering the same performance and features.
The device features a simple interface, an intuitive LCD display and a front control panel, providing direct access to calibration settings, setpoint adjustment and acid/base selection. Thanks to an electromagnetic solenoid dosing system, it offers stable, quiet and reliable performance over the long term.
The BL 7916 is designed to operate in demanding conditions. Its single-piece, injection-moulded polypropylene housing is waterproof, robust and chemically resistant, protecting the internal components from moisture, splashes and corrosion. The transparent cover allows visual inspection while protecting the adjustment elements.
The device has a built-in alarm that is triggered if the measured pH value deviates by more than ±2 units from the set point, allowing rapid intervention in the event of a malfunction or sudden change in the composition of the liquid. It also offers auxiliary contacts to control other external devices (mixers, backup pumps, etc.) and an isolated 4-20 mA analogue output for remote recording or monitoring.
Installation is simple. It can be mounted directly on a wall or tank, close to the injection point, ensuring minimal pressure loss and a fast system response. Its compatibility with a wide range of chemicals makes it a universal and versatile device, suitable for many industrial sectors.
Maintenance is simple thanks to easily accessible components, available spare parts and clearly indicated recommended preventive maintenance. The BL 7916 is a reliable and high-performance ally for all environments where pH stability is essential to process quality.
