Introduction:
The GP-400G is a high temperature glass body pH combined sensor designed for continuous online pH measurement in industrial water treatment. It features a low impedance sensitive glass membrane, a gel electrolyte salt bridge and an anti-pollution ceramic sand core diaphragm, delivering fast response, good thermal stability and long service life — with no electrolyte refilling required.
Specification:
| Parameter | Specification |
|---|
| Type | Glass Body pH Combined Sensor |
| Measuring Range | 0 – 14 pH |
| Temperature Range | 0 – 100 ℃ |
| Pressure Range | 0 – 0.4 MPa |
| Accuracy | ±0.1 pH |
| Equipotential Point | 7 ± 0.5 pH |
| Slope | ≥ 95% |
| Drift | ≤ 0.02 pH / 24 hours |
| Reference Resistance | ≤ 500 MΩ (25 ℃) |
| Response Time | 5 seconds |
| Max Flow Rate | Not more than 3 m/s |
| Body Main Material | High Temperature Glass |
| Wetted Material | High Temp. Glass Cover, Ceramic Sand Core |
| Membrane | Low Impedance Sensitive Glass Membrane |
| Electrolyte | Gel Electrolyte Salt Bridge |
| Connection Dimension | Pg 13.5 Thread |
| Protection Cover | PTFE Material, Pg 13.5 Inner Thread, 3/4" NPT Outer Thread |
| Cable Connection | Pin or BNC Connector |
| Installation | Plug-in |
Performance & Features:
Easy to use — no electrolyte refilling required.
Gel electrolyte salt bridge effectively prevents electrode poisoning.
Anti-pollution ceramic sand core diaphragm — not easy to be blocked, long working life.
Low impedance sensitive glass membrane — fast response and good thermal stability.
Applications:
Widely used for pH measurement in environmental protection, waste water treatment, chemical process, and other industrial online water quality monitoring applications.