GroPoint Multi-Depth Soil Moisture Probe

GroPoint Profile – Multi-Depth Soil Moisture Probe

The GroPoint Profile is a sleek and lightweight soil moisture probe designed to be vertically installed quickly and with minimal soil disruption, no excavating needed.

The GroPoint Profile takes average volumetric soil moisture measurements over each segment, with each segment of approximately 6 inches (15 cm). The GroPoint Profile’s length options are between 2 and 8 segments.

GroPoint Profile applications

  • Vineyardsrow
  • Crops
  • Cereals
  • Orchards
  • Silviculture
  • Irrigation practices research into plant/crop quality and yield and reduce fertilizer run-off.

See below for further details and specifications.


GroPoint Profile – Soil Moisture Probe.

The GroPoint Profile soil moisture probe is perfect for soil moisture profiling from depths of 30cm down to 1.2m. The easy to install probe outputs digital soil moisture and temperature as measured over the probe length on one communication wire. No post-processing required; all calculations performed within the sensor and transmitted straight to your datalogger via SDI-12 for display or storage.

The soil moisture probe’s Time-Domain-Transmission (TDT) technology provides volumetric soil moisture readings (percentage of water in the soil) at multiple depths.

The GroPoint Profile excels in irrigation zones to provide an understanding of water movement through the soil by accurately tracking relative changes in soil moisture throughout the soil column.

Utilising the insertion tool and slide hammer, installation takes minutes without the need for grout or slurry filling and deep excavations. Minimal soil disturbance when installing can lead to decreased settling periods.

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  • Continuous soil moisture measurements over the entire length of the probe

  • Configurable with or without soil temperature measurements at every 10 cm

  • 6 different probe lengths available

  • SDI-12 interface, optional Modbus over RS-485.

  • Based on GroPoint’s unique patented TDT5 technology.

  • Comes with 3 m (9.8′) durable cable (Flying lead Standard, Optional 5-pin IP68-rated M-12 or 4-pin IP68-rated EN3 connector available).

  • Factory-calibrated for most agricultural soils – custom calibrated before shipping upon request when ordering.

  • GroPoint Profile soil moisture sensor can be custom calibrated by the customer—see the detailed procedure in the User Manual.

Gropoint – Soil Moisture Probe Specifications

Measurement range 0% to 100% of VMC
Accuracy ±2.0% *
Precision < 0.2%
Measurement range -20°C to +70°C
Accuracy ±0.5°C
Output SDI-12 V1.3 (RS485 and Modbus optional)
Connection Bare wire (optional 5-pin M-12 or 4 pin EN3 IP68 rated environmental connectors)
Input voltage 6 to 14 VDC max. 18 VDC
Current consumption Quiescent: Active: 15-20 mA (depending on number of segments) for 100 mS
Warm-up time On power-up
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
Length Each segment is approximately 15 cm long. Total length is the number of segments multiplied by 15 cm.
For example, a 3-segment probe is about 45cm long.
Probe weight 2 segments: 292 g
3 segments: 351 g
4 segments: 408 g
5 segments: 468 g
6 segments: 526 g
8 segments: 642 g
Temperature Placement 2 segments: 3.5cm, 10cm, 20cm, and 30cm
3 segments: 3.5cm, 10cm, 20cm, 30cm, 40cm, and 45cm
4 segments: 3.5cm, 10cm, 20cm, 30cm, 40cm, 50cm, and 60cm
5 segments: 3.5cm, 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, and 75cm
6 segments: 3.5cm, 10cm, 20cm, 30cm, 40cm, 50cm, 55cm, 65cm, 75cm, 85cm, and 90cm
8 segments: 3.5cm, 10cm, 20cm, 30cm, 40cm, 50cm, 55cm, 65cm, 75cm, 85cm, 95cm, 100cm, 110cm, and 120cm
Cable weight 38 g per m
Standard cable 3 m 4xAWG22 dual-shielded, twisted pair, rated for direct burial