Obsnap Instruments Sdn Bhd
29A, Jalan SS 15/4C, 47500 Subang Jaya, Selangor, Malaysia.
+603-5621 5786
+603-5621 5829
+60122185651 (Enquiry)
+60162233687 (Vacancy)

pH Controller and Pump BL7916

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pH Controller and Pump BL7916 Process Instrumentation Water / Liquid Analysis

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  • pH controller and dosing pump in one compact unit.
  • ±0.01 pH accuracy with unbeatable performance.        
  • Isolated 4 to 20 mA recorder output.
  • Proportional dosing slows the pump down when the measured pH level approaches the set valve, which ensures precise dosage and avoids costly waste of chemicals due to overdosage.
  • Alarm contact is activated whenever the pH value varies more than 2 pH units from the set point.
  • Auxiliary contacts allow the user to attach a mixer or priming pump that is activated only when the pump is dosing.
  • PVDF, FPM/FKM and PTFE materials are used for all parts that come into contact with liquid.

The controller/pump series of instruments are enclosed in a modular housing for maximum protection. These pumps utilize the one-piece polypropylene, injection-molded housing. Since there are no joints or screws holding different sections of the housing together, the case is extremely rugged and sturdy. This series of instruments will mount easily in your plant using a minimum of wall space. The controls and pump head are located in the front to allow easy access.

Order Information:
BL 7916-1 is supplied with discharge and suction valves, polyethylene tubing, 115V power cable and instructions
BL 7916-2 is supplied with discharge and suction valves, polyethylene tubing, 230V power cable and instructions


Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.01 pH
Flow Rate 13.3, 11.7, 10.1, 9.0, 7.8 (LPH)
pH Temperature Compensation fixed temperature compensation of 25°C (77°F)
Input Impedance 1012 Ohm
Dosage proportional, acid or base, user selectable
Calibration offset: ±1 pH with trimmer; slope: 85 to 115% with trimmer
Recorder Output 4-20 mA (isolated)
Dosing Contact 1 isolated contact, 2A, Max. 240V, resistive load, 1,000,000 strokes
Alarm Contact 1 isolated contact, 2A, Max. 240V, resistive load, 1,000,000 strokes
Over Current Protection 250V fuse
Display LCD
IP Rating IP55
Power Supply BL 7916-1: 115V ±15%; 50/60Hz (40W)
BL 7916-2: 230V ±15%; 50/60Hz (40W)
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions 221 x 142 x 181 mm (8.7 x 5.6 x 7.1')
Weight 5 kg (11 lb.)
Ordering Information BL7916-1 is supplied with 7 m (23') LPDE suction valves, polyethylene discharge tubing, 115V power cable and instructions.
Warranty 1 year


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