This document is a user manual for the JWSL-3 series economical temperature and humidity transmitter produced by Beijing Kunlun Coast Sensing Technology Co., Ltd. The transmitter features integrated sensing and transmission design, suitable for temperature and humidity measurement in HVAC indoor environments. The technical parameters include power supply, range, accuracy, and working environment. During installation, it is important to consider the installation position and avoid interference from high-power devices. When using the transmitter, it is necessary to connect the power supply and ensure correct wiring.
The JWSL-3 series is an economical temperature and humidity transmitter designed for indoor HVAC applications. It integrates sensor and transmitter functions and offers multiple output options such as 4‑20 mA, 0‑5 V, and RS‑232/RS‑485.
The manual provides technical parameters, wiring diagrams, installation steps, usage instructions, maintenance recommendations, storage guidelines, and detailed fault analysis with Modbus communication protocol details. This manual is written in Chinese.
| Power Supply | DC 24 V (22 V‑26 V) / DC 12 V |
|---|---|
| Humidity Range | 0 %RH‑100 %RH |
| Humidity Accuracy | ±3 %RH (5 %RH‑95 %RH, 25 °C) |
| Temperature Accuracy | ±0.5 °C (0 °C‑50 °C) |
| Working Environment | -10 °C‑60 °C; 0 %RH‑100 %RH (non‑condensing) |
| Long‑term Humidity Stability | < 1 %RH/year |
| Response Time | < 15 s (1 m/s wind) |
| Dimensions | 113 mm × 72 mm × 37 mm |
| Weight | ≈110 g |
The transmitter can be powered by DC 24 V (acceptable range 22 V‑26 V) or DC 12 V.
It follows the MODBUS RTU protocol and provides RS‑232/RS‑485 interfaces.