Partech Products WaterTechw² PHEVT Sensor
WaterTechw² pH, Redox and Temperature Sensor
Combined Sensor for pH, Redox and Temperature Monitoring
The WaterTechw² PHEVT Sensor has been designed to provide highly reliable pH, Redox and Temperature measurements. The electrode uses Ponsel's Plastogel technology, the
long life reference increases the life of the electrode, reducing maintenance and operating costs.
The electrode has been designed to work in even the most difficult applications, from pure mountain streams with conductivity as low as 20 µS/cm, through lakes and rivers,
seawater and wastewater with conductivity of 200 mS/cm. By having such a flexible sensor users can adopt the WaterTechw² PHEVT as the standard sensor for water quality
monitoring.

For installation in applications where fouling is anticipated we recommend that the sensor is installed using our specially designed mounting system, with a flexible
joint in the mounting shaft. The flexible joint moves the sensor in the process, reducing bio-fouling and allowing rags to fall away from the assembly. This motion is
similar to that achieved by using a floating ball assembly, with the added advantage of placing the sensor below the surface of the liquid. In applications where fouling
is not expected or where there is insufficient space alternative mounting arrangements are available.
Technical Specification
Physical
| Dimensions | 27 mm diameter x 207.5 mm long |
| Weight | 0.35 kg |
| Protection Class | IP68 |
| Material of Construction | PVC Body, pH Glass, Platinum |
| Cable Entries | Integral Cable Gland |
| Cable Type | 6 core, Polyurethane Coated |
| Cable Length | 10 metres standard, 100 metres maximum |
| Service Requirement | Electrode Cartridge Replacement |
| | Periodic Cleaning and calibration are required at a frequency determined by the application |
Environmental Data
| Operating Temperature | 0 - 60ºC |
| Storage Temperature | 0 to 60ºC |
| Pressure | 5 Bar |
| Location | Indoor/Outdoor |
Interface to Monitor
| Sensor Output | ModTechw², RS485 |
| Power | 12 VDC from Monitor |
pH Measurement
| Principal of Operation | Combined Electode (pH/reference) - Ag/AgCl |
| Reference Gel Electrolyte - KCl |
| Accuracy | +/- 0.05 pH |
| Resolution | 0.01 pH |
| Range | 0 - 14 pH |
Redox Measurement
| Principal of Operation | Combined Electrode (Redox/Refrerence), Platinum Tip, Ag/Ag/Cl |
| | Reference Gel Electrolyte (KCl) |
| Accuracy | +/- 2 mV |
| Resolution | 0.1 mV |
| Range | -1,000 - 1,000 mV |
Temperature Measurement
| Temperature Measurements | NTC |
| Accuracy | +/- 0.5ºC |
| Resolution | 0.01ºC |
| Range | 0- 50º C |
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