GroPoint Profile

GroPoint profile soil moisture sensor

GroPoint Lite

GroPoint Lite soil moisture sensor

GroPoint Pro

GroPoint Pro soil moisture sensor

GroPoint Classic

GroPoint Classic soil moisture sensor

GP-DU Handheld Sensor Reader

GP-DU Handheld soil moisture meter

Bluetooth Sensor Pod

Bluetooth sensor pod wireless soil data collection

GroPoint CloudConnect

GP-DU Handheld soil moisture meter

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Soil moisture sensor product catalog
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Download the Product Catalog

Enter your name and email address to receive a link to the PDF version of the GroPoint Product Catalog.

Soil moisture sensor product catalog
We need to know who we're sending it to.
Please enter a valid email address.
The link to the product catalog is on it's way.×
Oops...Something went wrong, your submission did not go through. Please send an email to info@gropoint.com.×

Soil Sensors

The GroPoint™ Sensor Suite

GroPoint Profile

GroPoint Lite

GroPoint Pro

GroPoint Classic

* 8% to 42% VMC, in controlled laboratory conditions; factory calibrated for most agricultural soils. In field applications, accuracy may slightly decrease due to the inevitable heterogeneity of soil texture, soil compaction, moisture and fluctuation in soil temperature. The accuracy may also decrease in difficult soil conditions (higher clay and salinity content). In normal conditions, GroPoint sensors will maintain their accuracy from permanent wilting through field capacity in sandy loam through clay soils with less than 60% clay particles. Under moderately saline conditions. GroPoint sensors will maintain their accuracy up to 6 ds/m.

  • All products can be ordered online, or by contacting a local dealer.
  • See our ordering and returns policy.
  • All sensors come standard with 5m cable, 3xAWG22 (analog) or 4xAWG22 dual-shielded, twisted pair, rated for direct burial.
  • Cables terminate in bare wire, but can be ordered with an optional EN3 IP66/IP68 rated environmental connector.
  • Custom cable lengths can be ordered.
  • All sensors come with a 1-year limited parts and labour warranty.

TDT5GroPoint's patented technique for soil moisture measurement

Our proprietary TDT5 technology delivers an exceptional price:performance ratio, with performance as good (in most cases better) as sensors costing much more.


How does it work?

GroPoint™ sensors are based on the field-proven Time Domain Transmission (TDT) method of reliably measuring soil moisture, which is a refined version of Time Domain Reflectometry (TDR). TDT-based sensors do not need to be calibrated to each type of soil they will be buried in to deliver excellent accuracy and stability, however we do calibrate for 3 specific soil types for even greater accuracy.

TDT5 enhances TDT in 5 key ways:

Antenna length per segment: 15cm

Effective length (if stretched out): 75cm

1:Extreme accuracy

Our patented design weaves the antenna through the circuit board 20 times per centimetre, and much like a coiled spring the effective length of the antenna is 5 times the physical length it consumes. It's like having a 75cm long antenna in a single 15cm sensor. A larger antenna increases the resolution of each sample, allowing more noise to be filtered out, improving the accuracy to ±1% (between 8% to 42% VMC).

2:Reduced manufacturing cost

Unlike other moisture probes, Gropoint sensors do not have separate components for electronics and bulky metal antennas. By integrating the antenna and all electronics into the same circuit board (possible thanks to the patented antenna design), manufacturing costs are dramatically reduced.

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3:Repeatable accuracy

Each time a measurement is taken, GroPoint sends 400,000 pulses through the sensing element to generate data for the measurement, then employs advanced filtering to eliminate outlying readings (noise) before averaging the data and sending the measurement as SDI-12 output. This ensures that the same extreme accuracy (±1%) is obtained each and every time moisture is measured.

400000

pulses filtered per measurement

4:Low power consumption

Even with 400,000 pulses for each measurement, the total time to take the measurement is less than 100 ms. This means that power consumption is minimal, and that permits GroPoint sensors to be operated for many months with small 9V battery-powered data loggers.

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5:Maximum durability

Unlike typical sensors, the antenna is not exposed to the soil, so there's nothing to bend or break. The entire sensor circuit board is sealed in epoxy then encased in a sealed polycarbonate housing.

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Epoxy sealant

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Polycarbonate housing