GroPoint Display Unit, SDI-12 Sensor Reader
Instant readings of current conditions measured by your in-site SDI-12 sensors
The GroPoint SDI-12 Display Unit provides a simple, portable way to view real-time readings from any SDI-12 sensor in the field.
Quickly connect and view measurements directly on the display without needing additional software or tools.
Compatible with any SDI-12 sensor operating on a 9V power supply for flexible use in a variety of applications..
Lightweight, easy to use, and ideal for fast sensor checks or troubleshooting in the field.
GroPoint Bluetooth data logger compatible with soil sensors
Overview
GroPoint Display Unit
The GroPoint Display Unit offers instant access to real-time measurements from GroPoint soil probes, designed for soil moisture and temperature monitoring. Ideal for both standalone use and system troubleshooting, this device easily connects to GroPoint’s SDI-12 sensors and other SDI-12 compliant sensors, providing immediate data on current soil conditions. The GP-DU features a large, easy-to-read display housed in a durable, weather-resistant casing, equipped with a 5-pin Female M12 connector for reliable sensor connection.
Features
Battery operated (requires 9V alkaline)
Simple buttons to cycle through SDI-12 measurement commands
Instant soil conditions displayed
Compact and robust
Reads SDI-12 soil moisture sensing devices that can operate from a nominal 9V battery supply
Specifications
Product Specifications
| Display | 8-Digit Alphanumeric LCD |
| Operating Temperature Range | 0°C to 65°C (32°F to 150°F) |
| Maximum Temperature | -20°C to 70°C (-4°F to 160°F) |
| Power Requirement | 9.0V Alkaline Battery |
| Dimensions | 12.1 cm x 7 cm x 2.5 cm (4.75” x 2.75” x 1”) |
| Weight | 181 g (0.4 lb) |
| Part Number | 2628 |
FAQs
+ Compatibility
What type of sensors are compatible with the SDI-12 Display Unit?
Any sensors that follow the SDI-12 protocol and can operate from a nominal 9V battery supply are compatible with the Display Unit.
What precision of measurements can be displayed?
The SDI-12 Display Unit has four-digit display precision.
+ Configuration & Connectivity
What do the readings displayed on my SDI-12 GroPoint Display Unit represent?
If you have one of the GroPoint sensors connected to the GPDU, the following table breaks down how each measurement will be represented. All moisture measurements have units in % volumetric moisture content, and all temperature measurements are in Celsius.
For third-party sensors, the command structure is as follows:
M! commands: Reading displayed as VL.n ± d.ddd, where n is the measurement number and d.ddd is the value.
Mx! commands: Reading displayed as Mx.n ± d.ddd, where x is the SDI-12 measure command (M1! to M9!).
Not all SDI-12 sensors support all nine measurement commands. Most sensors return fewer values per command. Refer to your sensor’s manual for full details.
How do I connect the SDI-12 Display Unit to a sensor?
The Display Unit comes equipped with a M12 5-pin code A female connector. To connect a sensor, you will need either:
- A mating male connector on the sensor
- The Alligator Clip to M12 Male Adapter for sensors with flying leads
What is the connector pinout for the GPDU?
The SDI-12 Display Unit uses a M12 5-pin code A female connector with the following pinout:
+ Power
What type of battery does the Display Unit take?
The Display Unit comes with a 9V alkaline battery installed. Remove the contact cover before use. If you need to replace the battery, use only a 9V alkaline battery.
How do I know if the batteries need to be changed?
If the battery voltage drops too low, the message “*** Low Battery ***” will be displayed when the Display Unit is powered on.
+ Troubleshooting
What should I do if the Display Unit shows an error message?
If you get an error message, check the following:
- Verify the sensor connection and wiring
- If using a third-party sensor, confirm it can be powered from a nominal 9V battery supply
- Check the Display Unit battery voltage with a multimeter — it must be above 7.2V. Replace the battery if it is lower.
Downloads
Datasheets
Documentation
Inquire
Submit an Inquiry
Related Products
Lets you use your GP-DU SDI-12 Sensor Reader with non-GroPoint SDI-12 sensors.
P/N: 3080