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Cooling tower water quality controller

冷却塔水質制御器 CEB-51

Control of replenishing water for a cooling tower, etc. can be done with this 1 unit.

The conductivity of the water circulating in the cooling tower is measured,

and in case of excessive concentration,
the power-driven valve or solenoid valve for the replenishing water

is opened or closed.



Advantages Applications Specifications
Outline drawing Relevant  


・The built-in timer enables up to 2 chemical injection pumps to be operated individually.

・The large LCD with backlight indicates the measured value of conductivity, alarm point,

 alarm direction, and current value.

・The settings for transmission current at the time of an error or calibration can be made arbitrarily,

 and safety is taken into account.

・The temperature gradient value for the conductivity of the solution being measured can also be set.
・Equipped with clock functions, settings for the pump operation start time, etc. can be made.

・By means of the range changeover (manual), measurement from low concentration to

 high concentration can be made.

・Adjustments of the cell constant, ZERO point, and SPAN point can be made.
・The current output corresponding to the range can be obtained.

・The meter has 2 ranges of conductivity measurement: 2000μS/cm and 10.00mS/cm,

 and a switching between /cm and /m can also be made.

・As for the electrode, the alternating current 5-electrode method is employed that is resistant to dirt

 and involves little measurement error.

・Titanium is used for the detection electrode, and PVC is used as the body material,

 thus having excellent corrosion resistance.

・The power supply is designed to work at any voltage between AC100 and 240V.

・A sunshade cover is included as the standard accessory, and the waterproof construction grade

 when the sunshade cover is fitted is IP54 or equivalent that allows the meter to be used outdoors.


・Measurement of the circulating water in a cooling tower and control of replenishing water.

・Control of replenishing water for various types of chemical solutions.


Name Cooling tower water quality controller
Type CEB-51
Method of measurement Alternating current 5-electrode method
Range of measurement

Conductivity range

0- 10.00mS/cm, 0 - 2000μS/cm Manual switching

/cm, /m Switchable

Conversion at the reference temperature 25℃

Temperature compensation

Temperature compensation range: 0 - 50℃ Temperature accuracy: ±1℃

Temperature device Pt1000Ω

Temperature compensation factor  Automatic: 2%/℃ Manual 0.5 - 5%/℃

Resolution EC:0.01mS/cm、1μS/cm
Transmission output DC4 - 20mA(maximum load: 500Ω)
External input No voltage contact: 1 point  Voltage-applied contact: 1 point
Control method ON/OFF control
Setting method

Power-driven valve, solenoid valve side

・Conductivity interlock(ON/OFF control, DIFF)

・24Hr timer interlock ON time/OFF time, number of times(within 24 hours)

・External input interlock

Above to be chosen


Chemical injection pump side

・24Hr timer interlock ON time/OFF time, number of times(within 24 hours)

・External input interlock

Above to be chosen

Control output

For power-driven valve, solenoid valve

Voltage-applied output(dependent on power supply voltage) 1 point
To be controlled by EC value


For chemical injection pump

Voltage-applied output(dependent on power supply voltage)2 points

Time and number of times control

Power supply AC100 - 240V
Operating environment 0 - 40℃ 85%RH or less
Outer dimensions 138(W)×138(H)×175(D) mm
Weight About 2kg
Standard accessory Sunshade cover
Optional item FCS-75N

Electrode Specifications



 Name  EC electrode
 Type  FCS-75N
 Cell constant  1.0(at standard)




 Lead length  10m


Outline drawing

      CAD DATA  

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