The SONBEST SM8701V is a voltage‑type non‑contact infrared temperature sensor with RS485, 4‑20 mA, DC0‑5 V and DC0‑10 V outputs, and this manual provides…
The SM8701V is a voltage‑type non‑contact infrared temperature sensor designed for integration with PLC, DCS and other instrumentation. It offers multiple output options (RS485, 4‑20 mA, DC0‑5 V, DC0‑10 V) and operates from a 12‑24 V DC supply.
The manual details wiring diagrams, Modbus‑RTU communication protocol, and command formats for reading and configuring device address, baud rate, and calibration values. It also provides formulas for converting the analog outputs to temperature readings. This manual is written in Chinese.
| Temperature measurement range | 0 °C ~ +300 °C (max 380 °C) |
|---|---|
| Temperature measurement accuracy | ±1 °C or ±1 % (max ±3 °C) |
| Repeatability | ±0.5 °C or ±0.5 % (max ±2 °C) |
| Optical resolution | 1.6:1 |
| Spectral range | 18‑14 µm |
| Response time | 100 ms |
| Emissivity | 0.96 |
| Output methods | RS485, 4‑20 mA, DC0‑5 V, DC0‑10 V |
| Supply voltage | DC12‑24 V, 1 A |
| Dimensions | Φ24 mm × 80 mm |
Use the formula C = (300‑0) × (X‑4) ÷ (20‑4) + 0, where X is the measured current in mA.