Features of EWN-W series
WPO (pH/ORP), WEC (conductivity), WCT (cooling tower) and WCL (free residual chlorine) controllers are available. Also, the extra large LCD improves legibility and ease of operation.
Stroke speed adjustment in 1 spm increments allows fine flow adjustment between 1 and 360 spm in continuous chemical feeding.
The EWN-W can be used in all countries thanks to the universal power supply (100 – 240 VAC).
Newly-designed adjustable tube fittings eliminate tube twisting when fastening.
The molded pump body with a minimum of sealing surfaces meets a high level (IP65 equivalent) of both waterproofness and dustproofness.
Specifications of pump
| Discharge capacity range |
38 – 420 mL/min |
| Max. discharge pressure |
0.2 – 1.0 MPa |
| Main materials |
PVC, PTFE |
| Stroke rate |
1 – 360 spm |
| Liquid temperature range |
0 – 40°C |
| Viscous liquid |
Please contact us for details. |
| Slurry liquid |
Can not be handled. |
Specifications of controller
| Model |
WPO |
| Control modes |
pH |
Oxidation-reduction potential |
| Control function |
Function |
AUTO / MANUAL |
| Control method |
Proportional control (PID control) |
| Input |
Sensor input range |
0.00 – 14.00pH
Auto (matic) temperature compensation |
-2000 – 2000 mV |
| Liquid temperature range (Temp. sensor type) |
0 – 99.9°C (Pt1000) |
— |
| STOP / PreSTOP |
Red LED lights and the pump stops at contact input. / Orange LED lights at contact input |
| AUX |
The pump runs at 360 spm when the non voltage contact is on |
| Interlock |
The pump stops when the non voltage contact is on |
| Output |
Output 1 |
The non voltage contact is on (Mechanical relay)AC250V3A
1. Upper limit output
2. Lower limit output
3. Select of all functions (Select one function) |
| Output 2 |
The non voltage contact is on (Photo MOS relay) AC/DC 24 V 0.1 A
1. Upper limit output
2. Lower limit output
3. Select of all functions
4. spm synchronous output (Select one function) |
| Power voltage |
100 – 240 VAC 50/60Hz |
| Model |
WEC |
WCT |
| Control modes |
Conductivity |
Cooling tower |
| Control function |
Function |
AUTO / MANUAL |
| Control method |
Proportional control |
Timer control |
| Input |
Sensor input range |
0 – 400 mS/m (0.00 – 4.00 mS/cm) |
| Liquid temperature range (Temp. sensor type) |
0 – 99.9°C (Pt1000) |
| STOP / PreSTOP |
Red LED lights and the pump stops at contact input. / Orange LED lights at contact input |
| AUX |
The pump runs at 360 spm when the non voltage contact is on |
Contact is on |
| Interlock |
The pump stops when the non voltage contact is on |
| Output |
Output 1 |
The non voltage contact is on (Mechanical relay)AC250V3A
1. Upper limit output
2. Lower limit output
3. Select of all functions (Select one function) |
| Output 2 |
The non voltage contact is on (Photo MOS relay) AC/DC 24 V 0.1 A
1. Upper limit output
2. Lower limit output
3. Select of all functions
4. spm synchronous output (Select one function) |
| Power voltage |
100 – 240 VAC 50/60Hz |
| Model |
WCL |
| Control modes |
Free residual chlorine (tap water level equivalent, sodium hypochlorite only) |
| Control function |
Function |
AUTO / MANUAL |
| Control method |
Proportional control |
| Input |
Sensor input range |
0.00 – 3.00 mg/L, Automatic temperature compensation |
| STOP / PreSTOP |
Red LED lights and the pump stops at contact input. / Orange LED lights at contact input |
| AUX |
The pump runs at 360 spm when the non voltage contact is on |
| Interlock |
The pump stops |
| Output |
Output 1 |
The non voltage contact is on (Mechanical relay) AC250V3A
1. Upper limit output
2. Lower limit output
3. Select of all functions (Select one function) |
| Output 2 |
The non voltage contact is on (Photo MOS relay) AC/DC 24V 0.1A
1. Upper limit output
2. Lower limit output
3. Select of all functions
4. spm synchronous output (Select one function) |
| Power voltage |
100 – 240 VAC 50/60Hz |
