Measuring principle:
PH sensor is a composite electrode constituted of glass indicator electrode and reference electrode。The measurement of PH is based on the potential difference measured in solution by a working cell consisting of a measuring electrode and a reference electrode. The linear relationship between the pH value of the solution to be measured and the potential of the working cell is used to realize the on-line monitoring of pH.
Functional feature：
It has good repeatability and stability.
It has the advantages of simple cleaning activation and fast balancing speed.
With automatic temperature compensation function.
A/D conversion module can be selected to realize digital signal output. It has strong anti-interference ability and long transmission distance.
A/D conversion module can be selected to achieve standard digital signal output (RS485).It can also achieve integration and networking with other devices without a controller.
The sensor installation is convenient and fast, which can realize plug and play.
It has the characteristics of simple use and reliable results. In addition, interface instructions can reduce errors.
Set up a visual alarm system to provide important alarm functions.
The controller can achieve wall-mounted installation/panel installation/clamped installation.
Typical application：
On-line monitoring of pH in inlet and outlet of sewage treatment plant, sedimentation tank, biochemical reaction tank and other processes.
PH monitoring of municipal water supply industry, surface water, aquaculture and other industries.
On-line monitoring of pH for water use and wastewater treatment in various industrial processes.
Sensor technical parameters:
| Measuring range |
PH: 0-14pH temperature: 0-80℃ |
| Accuracy |
PH:±0.1pH temperature:±0.5℃ |
| Pressure range |
≤0.6Mpa |
| PH of zero potential |
7±0.25ph（nV） |
| Slope |
≥95% |
| Internal resistance |
≤250MΩ |
| Alkali error |
0.2pH（1mol/L Na+ pH14）（25℃） |
| Responsive time |
≤10 second (Reach the end value 95%) (after stirring) |
| Main materials of sensor |
Black polypropylene, Ag/Agcl reference gel |
| Medium temperature |
0-80℃(no icing) |
| Size |
Diameter 28.7mm x length 195mm |
| Weight |
0.2kg |
| Level of protection |
IP68/NEMA6P |
| Cable length |
Standard cable length: 10m, extended |
Controller technical parameters:
| Display output |
128*64 graphic dot matrix LCD with LED strong backlight, which can be operated under direct sunlight |
| Power supply |
Ac power supply: 85-500VAC (50/60Hz), DC power supply: 9-36VDC |
| Main material |
PA66+GF25+FR (top cover), Aluminum alloy powder spraying (bottom shell) |
| Output |
Three-way 4-20 mA |
| Relay |
Three-way relay, program set response parameters and response values |
| Digital communication |
With MODBUS RS485 communication function, which can transmit real-time measured values |
| Storage temperature |
-20-70℃ |
| Operating temperature |
-15-60℃ |
| Waterproofing grade |
IP65/NEMMA4X |
| Size |
145mm*125mm*162mm(length * width * height) |
| Weight |
1.35kg |
