pH / ORP Meter PH102
Model PH102
Dual-function online pH/ORP meter: 0–14 pH, ±2000 mV, galvanically isolated 4–20 mA, high/low alarm relays, data storage and optional RS485 Modbus RTU.
- Measures pH or ORP with one transmitter
- Isolated 4–20 mA output
- High and low alarm relays (AC 220 V, 3 A)
- Stores three days of readings
- Optional isolated RS485 Modbus RTU
PH102 specifications
| pH range | 0–14.00 pH (maximum −2 to 16 pH), graduation 0.01 pH |
|---|---|
| ORP range | −2000 to +2000 mV, graduation 1 mV |
| Temperature range | 0–99.9 °C (maximum −10 to 120 °C), graduation 0.1 °C |
| pH accuracy | ±0.2 pH |
| ORP accuracy | ±1 mV |
| Temperature accuracy | ±0.5 °C |
| Automatic temperature compensation | 0–99.9 °C, 25 °C reference |
| Repeatability (electronic unit) | ±0.02 pH |
| Stability | ±0.02 pH / 24 h |
| Input impedance | ≥ 10¹² Ω |
| Galvanically isolated output | 4–20 mA |
| Output current error | ≤ ±1% FS |
| High/low alarm relays | AC 220 V, 3 A |
| Data storage | 72 points, three days of data |
| RS485 interface | Optional, Modbus RTU, isolated |
| Power supply | AC 220 V ±22 V, 50 ±10 Hz; optional DC 24 V ±2.4 V |
| Protection | IP54 |
| Dimensions | 96 (L) × 96 (W) × 120 (D) mm |
| Weight | 0.6 kg (transmitter) |
| Working conditions | 0–60 °C ambient, relative humidity < 85% |
| Electrode cable | 5 m standard; works with three-in-one or two-in-one combination electrodes |
The PH102 is an economical online pH/ORP meter for water and wastewater. One transmitter measures either pH (0–14.00 pH) or oxidation-reduction potential (−2000 to +2000 mV) together with temperature, so a single model covers neutralisation, chlorination and cyanide/chrome reduction points across a plant.
A galvanically isolated 4–20 mA output protects your PLC input from ground loops, the high and low relays switch dosing pumps or alarms directly, and the built-in memory keeps three days of data for troubleshooting.
Typical applications
- ETP neutralisation and equalisation tanks
- STP outlet and treated-water reuse
- Swimming pool and drinking water ORP
- Electroplating effluent treatment
Send us the application details and we will confirm the right configuration and lead time.
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