Gro-Point - Model Lite - Digital Soil Moisture Probe
From GroPoint - Soil Moisture Sensors
The GroPoint Lite soil sensor is robust, reliable and highly accurate, providing cost eective soil moisture and temperature measurements. The sleek, lightweight design installs quickly with minimal soil disruption. When installed vertically, the sensor averages volumetric moisture content over a soil layer of about 6” (15cm). When installed horizontally, the sensor can be used to measure moisture at a specic soil depth. GroPoint Lite can be deployed in irrigation-sensitive zones, such as around the root zone, to enable full control of precision irrigation needs.
Product Details
- Moisture readings can be user-calibrated with 3rd-order polynomials to meet custom requirements.
- Low power requirements—suitable for remote, autonomous applications.
- Patented TDT5 technology for scientic-grade accuracy and excellent long-term stability of measurements.
- Fully potted electronics for excellent durability.
Product Highlights
- Soil moisture and temperature probe.
- Flexible interface options (SDI-12, RS-485, 0-5mA and 4-20ma) simplify integration into a broad range of applications, ancillary equipment and data loggers.
- Based on our unique TDT5 technology.
- Comes with 5 m (16.4′) durable cable (4-pin IP68-rated EN3 connector optional).
- Factory-calibrated for most agricultural soils, but can be custom calibrated before shipping—request when ordering.
- Low power consumption—suitable for remote applications.
- Comes with 5 m (16.4′) durable cable (4-pin IP68-rated EN3 connector optional).
- SDI-12/RS-485 version of sensor can be custom calibrated by the customer—see detailed procedure in the user manual (see Downloads section).
Technical Specifications
Analog Version
Moisture
- Measurement range 0% to 100% of VMC
- Accuracy ±2.0% *
- Precision < 0.2%
Electrical
- Interface 0-5 mA, 4-20 mA
- Connection
- Bare wire
- Optional EN3 3-pin IP66/IP68 rated environmental connector
- Warm-up time
- Input voltage 6 to 14 VDC, max. 18 VDC
- Current consumption
- 0-5 mA: 18 mA (nominal), 25mA (max)
- 4-20 mA: 30mA (nominal), 50 mA (max)
Environmental
- Operating temperature -20°C to 70°C (-4°F to 158°F)
- Storage temperature -40°C to 85°C (-40°F to 185°F)
Physical
- Dimensions 19.6 cm x 2.0 cm x 0.56 cm (7.7” x 0.8” x 0.2”)
- Weight (with standard cable) 272 g (0.6 lb.)
- Cable weight 38 g per m (0.42 oz. per foot)
- Standard cable
- 5 m (16.40 ft.)
- 3xAWG22 dual-shielded, twisted pair, rated for direct burial
- Warranty 1-year limited parts and labour
Digital Version
Moisture
- Measurement range 0% to 100% of VMC
- Accuracy ±2.0% *
- Precision < 0.2%
Temperature
- Measurement range -20°C to +70°C (-4°F to 158°F)
- Accuracy ±0.5 °C
Electrical
- Interface SDI-12, RS-485
- Connection
- Bare wire
- Optional EN3 4-pin IP66/IP68 rated environmental connector
- Warm-up time
- Input voltage 6 to 14 VDC, max. 18 VDC
- Current consumption Quiescent: Active: 15-35 mA
Environmental
- Operating temperature -20°C to 70°C (-4°F to 158°F)
- Storage temperature -40°C to 85°C (-40°F to 185°F)
Physical
- Dimensions 19.6 cm x 2.0 cm x 0.56 cm (7.7” x 0.8” x 0.2”)
- Weight (with standard cable) 272 g (0.6 lb.)
- Cable weight 38 g per m (0.42 oz. per foot)
- Standard cable:
- 5 m (16.40 ft.)
- 4xAWG22 dual-shielded, twisted pair, rated for direct burial
- Warranty 1-year limited parts and labour
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