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| Brand | YST (Dalian Yisite) |
|---|---|
| Origin | Liaoning, China |
| Model | YST109B-HP880 |
| Measurement Range | pH 0–14, ORP −2000 to +2000 mV |
| Accuracy | ±0.02 pH (high-precision mode), ±0.1 pH (standard mode) |
| Temperature Compensation | 0–99.9 °C (reference 25 °C) |
| Output Signals | 4–20 mA (2-wire), RS485 (Modbus RTU) |
| Power Supply | 24 VDC (wide-range input), solar-compatible |
| Media Compatibility | Aqueous solutions, weakly corrosive liquids (pH 2–12), suspensions |
| Drift Stability | ±0.02 pH/24 h |
| Enclosure Rating | IP65 to IP67 |
| Response Time | <30 s (standard), <5 s (fast-response configuration) |
| Data Logging | 30-day local storage |
| Auto-Calibration | Supported |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST109B-HP880 |
| Measuring Range | pH 0–14 (optimized for wastewater: pH 2–12) |
| Temperature Compensation | 0–100 °C (automatic) |
| Output Signals | 4–20 mA analog + RS485 digital (Modbus RTU) |
| Power Supply | AC 220 V ±10% / 50 Hz or DC 24 V (optional) |
| Installation Types | Immersion, Flow-through, Insertion |
| Sensor IP Rating | IP68 |
| Transmitter IP Rating | IP65/IP67 |
| Response Time | ≤3 s (to 90% of final value) |
| Sensor Housing Material | 316L stainless steel & PTFE |
| Electrode Options | Glass electrode or solid-state electrode |
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