Wason WS-TH20G-C GSM Temperature and Humidity Recorder User Manual

About this manual

The WS-TH20G-C GSM temperature and humidity recorder is a standalone, data‑logging instrument with built‑in or external high‑precision sensors and SMS alarm capability. It is designed for continuous monitoring in fields such as food safety, pharmaceuticals, HVAC, and cold‑chain logistics.

The manual provides product overview, selection tables, technical specifications, detailed operation instructions, packaging contents, safety precautions, and a FAQ section for common issues and troubleshooting steps. This manual is written in Chinese.

What's inside

• Product Overview
• Product Selection Table
• Technical Specifications
• Instrument Use Instructions
• Packaging List
• Usage Precautions
• FAQ and Troubleshooting

Specifications

Frequently asked questions

Why does the device not power on when the SIM card is inserted?

Check the battery level; if empty, charge the device for at least half an hour before powering on, and ensure the SIM card is correctly placed.

Why are alarm SMS messages not received?

Make sure the alarm limits are set correctly, the SMS alarm switch is enabled, and the SIM card is not overdue or out of credit.

How can I download recorded data from the recorder?

Connect the instrument to a computer with the data cable; the device appears as a USB drive containing CSV files that can be copied to the PC.