I. Overview
Heat is the basis for the survival and reproduction of organisms, therefore, heat conditions are one of the decisive factors affecting crop zonal distribution and crop yield. The thermal condition of soil and the atmosphere near the ground is one of the important indicators of soil fertility. The change in soil temperature directly affects the growth of plant roots and their absorption, transportation, and storage of water and mineral nutrients. In other words, changes in soil temperature directly affect the growth of plants. Therefore, timely monitoring of soil temperature has a positive effect on plant growth in the region.
TRM-WD1 multi-point soil temperature recorder is a detection instrument produced by our company for rapid measurement of soil temperature. This product can monitor soil temperature in multiple layers of gradient or planar dispersion, and can continuously monitor the temperature of multiple sample plots and different soil depths for a long time. The equipment is easy to operate, has high measurement accuracy, reliable performance, convenient data viewing, and can be output with computer management software to generate reports, which can meet the needs of related work such as scientific research, production, and teaching.
Product composition: Soil temperature sensor, data collector, soil temperature tester, communication system, and power supply device, etc.
Application areas: Widely used in measurement and research in agriculture, forestry, geology, farmland, water conservancy, forests, lawns, highways, and other fields.

2、 Product Features
1. To adapt to outdoor use, the instrument adopts an integrated structure. Integrating data collectors, sensors, and portable suitcases into one chassis is extremely convenient to carry. The instrument has the ability to resist wind, rain, shock, corrosion, and strong magnetic interference, and does not require manual intervention during operation. It is suitable for use in the wild and harsh weather environments.
2. Large screen LCD graphics with Chinese characters display, capable of displaying multiple data channels on one screen for easy on-site observation.
3. The TRM-WD1 multi-point soil temperature recorder is equipped with a large capacity data storage device, which can automatically store collected data for more than 30 days. Simultaneously collecting data and automatically storing it, the storage time interval can be set arbitrarily within the range of 0 to 1 hour.
4. The TRM-WD1 multi-point soil temperature recorder software can run in WINDOWS XP and above environments, displaying real-time data from various sources. The system receives data and updates it every 10 seconds. The data from the receiving recorder is automatically stored in EXCEL standard format, with a storage time of more than ten years. At the same time, it can be connected to a printer to achieve automatic printing and storage of data.
5. The power supply system of TRM-WD1 multi-point soil temperature recorder adopts a dual-purpose AC/DC power supply mode, with AC: 220V DC: 12V. At the same time, the system also has power outage protection function. When the AC power is cut off, it is powered by the built-in rechargeable battery and can be maintained for more than 72 hours.
6. The communication system of the recorder provides two methods: wired transmission and wireless transmission. The wired transmission methods include: standard RS232/RS485/USB/RJ45 communication interfaces. Wireless transmission methods are divided into three types: short distance wireless transmission, medium distance wireless transmission, and long-distance wireless transmission.
7. The TRM-WD1 multi-point soil temperature recorder does not require a fixed bracket or location for installation and can be hung anywhere. The outer chassis is molded with plastic grease material molds, which are beautiful, sturdy, and have a long service life.

3、 Technical indicators

4、 System composition