UbiBot RS485 Soil Temperature and Moisture Sensor, Stainless Soil Probe for Greenhouse, Garden, Lawn, Farm, Soil Temperature Humidity Tester
(Audio Plug Connector, for GS1 Device only)
- Waterproof soil temperature moisture probe, Monitoring range:-40 to 80 C, +/-0.5 C; 0 to 100%AH
- Probe is made of stainless steel, easy to plug into soil and rust-resistant
- Matches with Ubibot GS1 device only, Audio connector, easy to deploy.
- 3 meters lead, appropriate for use in outdoor environment and keep the device indoor.
- The data can be viewed on the GS1 device screen as well as on the app and the web console remotely. Alerts are also available for its readings. The readings can be switched in the platform between absolute humidity and relative humidity.

Instructions
This probe specialises in monitoring temperature and moisture of soil. Embedded with industrial-grade chip, the probe offers accurate measurement. The stainless steel probe can be inserted into the soil for a long term without being corroded. The durable cable ensures stable data transmission. Integrated RS485 interface and audio plug connector, it is suitable for our sensing device GS1 device. All the readings are transferred to the device and synced to the platform via network. You can access the data instantly on the LCD screen or remotely view the condition via our app or any browser.
Application Instructions for single use:
Insert the steel probe point vertically to the soil at your preferred depth. Hold the probe tightly in case of it shaking. Avoid touching stones or any other hard objects, because that will damage the probe. We recommend you to measure multiple points for average data.
For long time berried in soil:
Dig a hole at over 20cm-diameter on the ground or soil in your use case. Insert the steel probe point in horizontal direction to the soil. Berry the probe with soil and you can have your data instantly.
How to connect to the device:
1. Connect the probe to the device.
2. Press the menu button to switch the screen display. The cursor will flash and stop at S-TH. Then the on-screen readings are from the soil probe.
3. To view it on the app or the web console, you can press the power button once to trigger data sync.
Reminder: When the probe is out of the soil, there is no moisture readings, only temperature is displayed.
About Humidity Readings:
All soil probes have been calibrated in the factory. Calibration including data points is conducted by placing the probe in the air to reach the minimum of 0% and pure water to reach the maximum 100%. For very wet soil, the reading is expected to be around 30% depends on the soil type. Please note that when the soil is waterlogged, the reading may jump from the values of 30%-35% to 100% as it is very close to the situation of soaking the probe in the pure water.
Specifications:
Connector: Audio plug
Power Supply Range: DC 5V to 12V
Operating Condition: -40°C to +85°C (-40°F to +185°F) 0 to 100% RH
Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)
Accuracy: ±0.5°C
Humidity unit: relative humidity or absolute humidity (can be switched in the web console)
Output Interface: RS485
Communications Protocol: Modbus
Item weight: 100g
Steel Point Length: 80mm
Length of Cable: 300cm
Material of probe: stainless steel
Warning: The probe point is very sharp. Be careful when using it and keep it away from children.
FEATURES
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Monitor the Soil Temperature and Moisture RemotelyThe Ubibot Soil probe is able to help you get insight of the soil conditions, so as to know when to irrigate. Plug it into the soil and connect it to our sensing device, you can view the data via the app wirelessly. |
Optional Relative Humidity and Absolute HumidityWe know that, some plants require absolute humidity readings. On our platform, you are given the option to select whether RH or AH as the moisture unit. Therefore, it's more convenient to manage your greenhouse according to the specific needs. |
Instant Readings on the LCD Screen, On-board StoragePairing with our sensing device GS1, the device's readings are displayed on screen instantly when you plug it into the soil. When you connect the device to the internet, all the readings will be synced to the platform automatically and can be downloaded to your computer. |
Comparison of Ubibot Probes

This probe specialises in monitoring temperature and humidity of soil. Embedded with industrial-grade chip, the probe offers accurate measurement. The stainless steel probe can be inserted into the soil for a long term without being corroded. The durable cable ensures stable data transmission.
There are two versions of the plug: Micro USB and Audio plug. The Micro USB port is suitable for our sensing device WS1 Pro and the Audio plug is designed for the GS1 device.
The measurements are transferred to the devices, displayed on the large LCD screen and synced to the platform via network. So you can access the data instantly on the screen or remotely view them via our app or web console.
The humidity readings on the app can be switched between Relative Humidity and Absolute Humidity. You can configure the display on the web console.
Application Instructions
For once use only:
Insert the steel probe point vertically to the soil at your preferred depth. Hold the probe tightly in case of it shaking. Avoid touching stones or any other hard objects, because that will damage the probe. Please wait for about 20 minutes to allow the sensor to work properly.
For long time berried in soil:
Dig a hole at over 20cm-diameter on the ground or soil in your greenhouse. Insert the steel probe point in horizontal direction to the soil. Leave the probe in the soil and you can have your data remotely.
About humidity readings:
All soil probes have been calibrated in the factory. Calibration including data points is conducted by placing the probe in the air to reach the minimum of 0% and pure water to reach the maximum 100%. For very wet soil, the reading is expected to be around 30% depends on the soil type. Please note that when the soil is waterlogged, the reading may jump from the values of 30%-35% to 100% as it is very close to the situation of soaking the probe in the pure water.
Kindly reminder:
The external sensors of the GS1 device are disabled by default . Please enable them in the "Settings" page on the App or the console after inserting the probe into the device. In this case, the readings from the external probe are accessbile. The button "RS485 S" refers to this soil probe. The GS1 device doesn't need this operation.
Warning: The probe point is very sharp. Be careful when using it and keep it away from children.