Featuring differential ground technology to eliminate solution interference, this premium analytical instrument supports flexible 3 or 5-point pH calibration and 2-point ORP calibration while logging detailed time-stamped historical data and up to 100 calibration maintenance entries.
| Model | APX2-G4 |
| Principle |
pH: Glass pH electrode (hydrogen ion concentration index) |
| Solution Ground | Differential ground |
| Display Range | pH: 0~14pH, ORP: ± 2000mV, Temp: -10~150℃ |
| Resolution | pH: 0.01pH, ORP: 1mV, Temp: 0.1℃ |
| Accuracy | 0.1% of the measuring range or ±0.02pH / ±2mV, take the larger one |
| Stability | 0.05% of measuring range every 24 hours without accumulation |
| Repeatability | Better than 0.1% of measuring range |
| Temp Compensation | Automatic or manual (NTC10K/PT1000 @customized) |
| 25℃ Conversion | Support |
| Relay Output | Two SPST relays, Max. load 3A/250VAC, set high/low alarm, temp. or clean control |
| Digital Output | A two-wire RS485 interface, Modbus RTU |
| Current Output |
Two 0/4~20mA, Max. load 1000Ω, supports long-line calibration |
| Electronic clock | Year/month/date, hour/minute/second |
| Historical Data |
Historical data query and download |
| Language | English |
| Display | 128 x 64, 3.2-inch graphic dot matrix LCD |
| Calibration Method | pH: 3 or 5 points; ORP: 2 points, offset |
| Protection Grade | IP66 |
| Enclosure Material | Enhanced ABS |
| Dimension | 144mm x 144mm x 120mm (Hole size 138mm x 138mm) |
| Power Supply | AC: 100~240V 50/60Hz or DC:18~36V |
| Work Temperature | 0~60℃, RH<95%, non-condensing |
| Storage Temperature | -20~70℃, RH<55%, non-condensing |
| Installation | Wall mounting, pipe clamp, panel mounting |
| Power Consumption | Max. 5W |
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