Hanna BL7917-1 ORP Controller and Pump

Description

Dual Functionality Integrating ORP Meter Pump

The Hanna BL7917‑1 ORP Controller and Pump is a compact yet powerful instrument that integrates two advanced functions into one housing: a precision ORP meter and a chemical dosing pump. This combination allows for automated control of oxidation-reduction potential and accurate dosing of oxidizing or reducing agents to maintain a precise setpoint in industrial and commercial process applications. Its design philosophy centers around providing process engineers and operators with a reliable and responsive solution that delivers real-time measurement and chemical correction simultaneously. By sensing the ORP continuously, the system dynamically adapts the dosing rates to match the chemical demands of the process, ensuring stability and consistency without continuous manual intervention. This dual nature minimizes installation footprint, reduces cabling complexity, and simplifies routine maintenance by consolidating critical water quality control functions into one rugged, corrosion-resistant enclosure. With accuracy rated at ±5 mV and resolution of 1 mV over a wide range from -999 mV to +999 mV, the BL7917‑1 serves both sensitive laboratory requirements and demanding process systems with equal effectiveness.

Applications In Plating Wastewater And Pools

The BL7917‑1 is designed to operate in a variety of specialized applications where precise oxidation-reduction potential control directly influences process quality and safety. In metal plating facilities, maintaining the correct ORP level is crucial for controlling electrochemical reactions, ensuring uniform coatings, and avoiding the chemical instability that can damage workpieces. The proportional dosing capability of the BL7917‑1 directly contributes to consistent plating results, extending bath life and reducing chemical waste. In wastewater treatment plants, the unit excels at controlling oxidizing agents such as chlorine or ozone and reducing agents like sodium bisulfite during dechlorination, meeting statutory discharge quality requirements. In municipal and private water treatment operations, it maintains the desired ORP level to ensure disinfection efficiency without overdosing chemicals, thus reducing operational cost and chemical consumption. Swimming pool facilities benefit from the BL7917‑1’s quick response to load changes, oxidative demand, and contaminant introduction, ensuring safe and comfortable water quality for bathers. In all cases, its rugged construction and precise metering provide reliable service, even in environments subject to spills, humidity, and chemical vapors.

Compact Installation Features And Rugged Design

Ease of installation is a hallmark of the BL7917‑1. Designed with mounting holes integrated into its sturdy base, it allows operators to quickly secure the unit to walls or framework with minimal effort. The front panel houses all operational controls, indicator LEDs, setpoint adjustment knobs, and the LCD display, enabling technicians to perform calibration, configuration, and monitoring without accessing rear panels or internal hardware. The unit’s casing is formed from fiber-reinforced polypropylene with an IP55 rating, offering strong resistance against dust ingress, water jets, and incidental splash in industrial settings. Components that come into contact with chemicals are manufactured from PVDF, FPM/FKM, and PTFE, ensuring long-term resistance to corrosion from aggressive reagents. This durability is especially important for facilities handling acids, bases, oxidizers, and solvents daily. Many motor-driven pumps fail under mechanical stress or corrosion; the BL7917‑1’s positive displacement solenoid design minimizes moving parts to essentially just the diaphragm action—there are no gears or cams to wear out. This robust build translates into less downtime, reduced parts inventory, and predictable maintenance schedules.

Proportional Dosing Avoids Chemical Overcorrection

The dosing system in the BL7917‑1 incorporates a proportional control mechanism that automatically moderates stroke rate as the measured ORP approaches the user-set target. This feature prevents overdosing, which can cause chemical waste, exceed permissible discharge limits, or damage downstream systems. By slowing delivery during approach to setpoint, the pump ensures a gentle correction curve, particularly critical with slow-reacting chemicals that might otherwise overshoot target values. In addition to conserving reagents and lowering operational costs, proportional dosing promotes safer operation by avoiding sudden concentration spikes that could create hazardous conditions for personnel or disrupt sensitive processes. Furthermore, the unit supports both oxidizing and reducing dosage modes, selectable by the operator to match process requirements. The inherent responsiveness of this design makes the BL7917‑1 suitable for scenarios with fluctuating loads—such as industrial washing, CIP (clean-in-place) systems, and pool management under variable usage. This intelligent stroke modulation capability defines it as a cost-effective yet precise dosing option across multiple industries.

Isolated Outputs And Auxiliary Contacts

For processes requiring data logging or remote monitoring, the BL7917‑1 features an isolated 4‑20 mA recorder output. This allows operators to connect chart recorders, PLCs, or SCADA systems without electrical interference affecting signal integrity. Such isolation ensures accurate data capture for compliance reports or trend analysis. Auxiliary contacts expand its functional flexibility by allowing external devices such as mixers or priming pumps to be activated only during dosing cycles. This integration reduces unnecessary running of auxiliary equipment, saves energy, and prolongs their operational life. Alarm contacts—also isolated and rated at 2 A, 240 V—can be configured as normally open or closed, activating if the ORP deviates by 200 mV from the setpoint. This immediate alert capability enables rapid response to process anomalies before they escalate into costly problems. Combined, these output and contact features make the BL7917‑1 not just a dosing pump but also a control hub capable of harmonizing several peripheral devices in a coordinated water quality management system.

Operational Safety And Chemical Compatibility

Safety considerations are embedded into the BL7917‑1’s design. The pump materials (PVDF, FPM/FKM, PTFE) inherently resist the chemical degradation caused by chlorine, acids, caustics, and many solvents, ensuring that wetted parts do not leach contaminants or weaken structurally over time. The IP55 enclosure rating shields the electronics from hazardous sprays and dust infiltration, allowing safe installation near tanks, process lines, and treatment basins without need for secondary enclosures. The positive displacement solenoid pump eliminates mechanical components prone to sudden breakage, lowering risk of catastrophic leakage. Operators can further safeguard systems by leveraging the alarm contacts to initiate emergency shutdowns, divert flows, or notify personnel if ORP deviates dangerously. Routine calibration is simplified with front panel access, minimizing operator exposure to dosing chemicals while adjusting settings. In regulated environments such as municipal water works or food processing, these safety and compatibility features are not only operationally advantageous but compliance-critical.

Supply Scope And Ordering Specifications

The BL7917‑1 is supplied as a complete, ready-to-install package composed of discharge and suction valves, low-density polyethylene tubing of 7 meters (23 feet), a power cord for the 115 V configuration, and a detailed instruction manual. This comprehensive supply scope ensures operators can commission the system without sourcing additional fittings or valves. The unit operates from a 115 V ±15% AC supply at 50/60 Hz with a 40 W consumption, making it compatible with standard industrial utility power. Measuring 221 × 142 × 181 mm (8.7 × 5.6 × 7.1 inches) and weighing approximately 5 kg (11 lb), the BL7917‑1 offers a compact footprint suitable for cramped process control rooms, lab benches, or equipment skids. Environmental specifications allow operation between 0 °C and 50 °C (32 °F to 122 °F) with up to 95% relative humidity, non-condensing, ensuring reliable service in typical industrial climates. Each unit is stringently tested for functional accuracy before shipment, aligning with Hanna Instruments’ global reputation for precision and durability.

tpt24.com Authentic Global Supply Partner

For procurement, tpt24.com is recognized as the leading global online store for the Hanna BL7917‑1 ORP Controller and Pump. The platform guarantees authenticity and product quality, backed by worldwide delivery capabilities that ensure customers receive genuine Hanna instruments regardless of geographic location. Purchasing through tpt24.com offers not only confidence in the source but also peace of mind through warranty support, competitive pricing, and responsive customer service in multiple languages. Given the critical nature of ORP control and chemical dosing in industries from water treatment to plating, sourcing from a trusted distributor is paramount to safeguarding process integrity and plant performance. tpt24.com’s logistics network ensures timely delivery to minimize downtime and supports scale from single-unit laboratory purchases to multi-unit industrial deployments.