pH Controller and Pump - BL7916-2

Na zalogi
The BL7916 is a pH controller that combines a pH meter with a chemical dosing pump in order to maintain the desired set point in process applications.
  • Two advanced instruments in one compact unit.
  • Convenient installation with all controls on front panel.
  • Widely used in plating, wastewater treatment, water treatment and swimming pools.

Easy Installation

Designed with mounting holes built into a rugged base, BL7916 is simple to install. All of the controls and pump assemblies are conveniently located on the front of the unit.

Rugged Construction

BL7916 is housed in rugged, fiber-reinforced polypropylene IP55 rated casings to protect from hazardous spills and splashes. PVDF, FPM/FKM and PTFE materials are used for all parts that come into contact with liquid to resist corrosion caused by chemicals.

Simple Pump Action

A positive displacement solenoid with few moving parts makes the BL7916 more reliable than motor driven pumps since there is no rotating parts, gears or cams; drastically reducing any chance of mechanical failure.

Proportional Dosing

A proportional control slows down the stroke rate as the measured value approaches the user selectable set points, avoiding overdosage of chemicals. This feature makes the pump’s dosing more accurate, saves chemicals and eliminates unnecessary and costly corrections to your process, especially with slow reacting chemicals.

Isolated Recorder Output

To enhance troubleshooting and the ability to record data while monitoring, simply attach a recording device to the instrument’s 4 to 20 mA output contacts, conveniently located on the front panel, to obtain a copy of the results on demand.

Auxiliary Dosing Contacts

Allows the user to attach a mixer or priming pump that is activated only when the pump is dosing.




pH Range   

0.0 to 14.0 

pH Resolution 

0.01 % 

pH Accuracy 

±0.01 pH 


offset: ±1 pH with trimmer; slope: 85 to 115% with trimmer 

Temperature Compensation 

fixed temperature compensation of 25°C (77°F)   

Input Impedance 

High Impedance 10¹² Ohm 

Alarm Relay Setpoint 

1 isolated, 2A, max. 240V, resistive load, 1,000,000 strokes 

Dosing Controll 

proportional, acid or base, user selectable 

Analog Output Signal 

4-20 mA (isolated) 

Dosing Terminals 

1 isolated, 2A, max. 240V, resistive load, 1,000,000 strokes 

Current Protection 

250V fuse 


115V ±15%; 50/60Hz (40W); 


0 to 50°C (32 to 122°F); RH max 95% non-condensing   

IP Rating 



221 x 142 x 181 mm (8.7 x 5.6 x 7.1’’) 


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. 

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