Where can I buy EnviroPro® precision soil probes?2019-09-05T16:26:59+09:30

If you are a grower or farmer and would like to install our soil sensors in your crops, please contact Entelechy for information on your local dealers, and integrating our probes into your existing or new telemetry system.

Telemetry Dealers / Agricultural Suppliers

If you would like to become an EnviroPro® re seller, please contact us.

Why do Entelechy recommend the use of a bentonite & sand slurry when installing EnviroPro® soil probes?2019-09-25T15:27:08+09:30

There are two major advantages to using the bentonite & sand slurry install method.

1 – Optimal sensor-to-soil contact AND

2 – Removal of probes is significantly easier

At Entelechy, we believe the accuracy and reliability of the data is paramount. The disruption of soil, and movement of objects in the soil, such as roots and rocks, that occurs during the boring process creates voids around an installed probe, whether it is tapered or not. Voids skew the probe’s readings due to the vast differences between the dielectric properties of the contents of the voids and the surrounding soil.

In conditions below saturation, voids present as air pockets. In saturated conditions, preferential flow will fill voids with water. While the presence of rock, roots and other solid matter in the soil cannot be controlled, voids can be eliminated with the use of a bentonite & sand slurry due to it’s ability to expand and fill any empty space around the probe.

Does using a slurry mean the EnviroPro® probe will measure slurry instead of soil?2019-09-25T16:20:27+09:30

Bentonite & sand slurry has minimal effect on the readings produced by an EnviroPro® probe.

Approximate electric field of single sensor – EnviroPro vs Competitor

This is because EnviroPro® sensors have been uniquely designed to have a much larger field of influence than other capacitance probes of similar diameter. With such a large sample size, 2-3mm of slurry makes a relatively small difference to it’s readings. Additionally, air pockets or water pockets caused by preferential flow are eliminated with the use of a bentonite slurry.  Air and water have significantly different dielectric properties to soil, so they have a much greater skew on results than a bentonite slurry, which has similar dielectric properties to soil.

Where can I source bentonite from?2019-10-31T10:45:11+09:30

We recommend using TruGel 100, which can be purchased directly through Sibelco.
Alternatively, you can contact us to arrange shipments of small quantities.

How do I install EnviroPro® probes?2020-07-28T11:13:09+09:30

Entelechy sell easy to use installation kits/ augers and recommend the use of a bentonite and sand slurry to ensure sensor-to-soil contact and to make them easier to remove/relocate.

For full instructions on how to install our probes and how to prepare a slurry, see our Installation Manual.

What is the diameter of the probes?2019-10-30T17:32:52+09:30

EnviroPro® probes are all 3.35cm in diameter.

Where are the sensors positioned?2019-10-30T17:31:43+09:30

The sensors are positioned every 10cm from the top of the probe.

Can I update my existing, installed EnviroPro® probes to measure salinity?2019-11-19T11:42:45+09:30

Yes. This can be achieved by purchasing an upgrade key from Entelechy or via your supplier. There are two methods to execute the upgrade using the key(s).
1. Using an EPCD config unit with Evaluate Program.
2. Sending the key via your logger’s transparent mode using SDI-12 extended commands (This method is only available on G series probes, and only if your logger supports transparent mode).

SDI-12 Commands

What is the field of influence?2019-10-29T16:47:38+09:30

The field of influence refers to the size of the electric field emitted by a sensor, and ultimately determines the volume of soil that it can measure. EnviroPro® boasts a larger FOI than competitor probes of similar diameter due to it’s unique sensor design. A larger FOI means a greater sample size, minimizing the effect that slurry, objects, roots and air pockets have on readings and producing more meaningful measurements of the local soil.

What is SDI-12?2019-11-19T12:02:06+09:30

SDI-12 (Serial Digital Interface at 1200 baud) is the serial communications protocol used by EnviroPro® and other intelligent sensors to communicate with data loggers.
It is used to request data from the probe using a set of commands as outlined in the document below:

EnviroPro® SDI-12 Commands

What voltages does EnviroPro® need to operate correctly?2020-02-27T15:02:51+09:30

The SDI-12 standard operating range is 9 – 16VDC. Our recommended operating range for EnviroPro® soil probes is 7 – 16 VDC. However, EnviroPro® soil probes will still operate correctly with as low as 6V on our standard 5m / 16ft cable with a single device connected to SDI-12 bus. The ability to work with a lower voltage can be a significant advantage in battery powered systems.

Do EnviroPro® probes work in all soil types?2020-03-24T15:09:03+09:30

Yes. However, for maximum accuracy (eg. for scientists or researchers) soil probes should be calibrated to soil type on site at the time of installation. Soil type calibration is different to our factory calibration which is to ensure life-time sensor-to-sensor and probe-to-probe repeatability, which is of highest importance in all applications. Ultimately, the daily water usage of the crop is a clear indicator to assist farmers in making optimal irrigation decisions, even without additional soil type calibration.

Who uses EnviroPro®?2019-10-30T15:00:57+09:30

EnviroPro® soil probes are used in many applications spanning multiple industries around the world. Soil probes are most often used by the farming industry, and applications include turf, trees, flowers, vegetables, citrus, vines, cane fields, grains and dry-land crops, and many other plantations of varying scale.

EnviroPro® soil probes have been used in stadiums, including the new Perth Stadium, golf courses and race tracks. They’re often the probe of choice for scientific research organisations, government departments, local councils, and educational institutions and are currently used by many of Australia’s top universities and major government departments.

Check the Current Trials section of our Case Studies page for access to live data from trials being conducted by some of our customers.

Why should I choose EnviroPro®?2020-02-27T12:10:31+09:30

There are many reasons to choose EnviroPro®! We know our probes are ahead of the competition in reliability, repeatability and accuracy.

EnviroPro® sensors have been uniquely designed to have a larger field of influence than competing probes of similar diameter, to allow for greater sample size. Both pro and standard models also employ clever techniques to compensate salinity and moisture measurements for variations in temperature, as well as compensating for moisture over-read caused by the presence of salinity. This is incredibly important, as without this compensation, all capacitive soil probes will read higher than the actual moisture content in saline soil. Irrigation decisions based on the over-read of of moisture by un-compensated competitor probes could damage the crop or cause significant yield volume or quality loss.

While some probes require occasional re-calibration in the field, EnviroPro® soil probes are individually calibrated in factory to ensure life time sensor-to-sensor and probe-to-probe repeatability. This allows users to collect trustworthy data at any depth, from anywhere on their property, compare and learn from historic events and trends and apply this knowledge to future events.

EnviroPro® soil probes are designed and manufactured in South Australia, and are long-life, fully encapsulated instruments to ensure maximum immunity to environmental degradation.

Our probes have been proving their excellence in farming, scientific research, education and mining industries for over 20 years and carry an unmatched 5 year warranty.

If you would like to know more, please contact us or visit our products page for more information.

Does Entelechy sell tools to install the probes?2019-10-30T13:37:22+09:30

Yes. Entelechy have standard and heavy duty installation kits available.
For information on available accessories and installation kits, visit our products page.

What is the best way to remove EnviroPro® probes?2019-10-30T13:34:00+09:30

EnviroPro® probes can be removed with the EnviroPro® Extraction Clamp.

For instructions on extracting EnviroPro® probes, please see our Installation Manual

How do I upgrade my probes to read salinity (EC)?2019-10-31T10:56:45+09:30

Standard EnviroPro® soil probes can be upgraded to output salinity metrics with an upgrade key which can be purchased from Entelechy. Please contact Entelechy if you would like to purchase an upgrade key.

The probes can be upgraded using an EPCD (EnviroPro® Configuration Dongle) and the Evaluate software installed on a computer or by sending the key via your logger’s transparent mode using SDI-12 extended commands (This method is only available on G series probes, and only if your logger supports transparent mode).

Download Evaluate Software

Evaluate Software Manual

Why does my 12 sensor EnviroPro® probe only output 9 sets of sensor readings?2020-03-03T16:01:10+09:30

Your logger is using “M” commands to retrieve data.
EnviroPro soil probes comply to the SDI-12 communication protocol. Early versions of this protocol can only support 9 sensor readings from each node. Later versions can support more than this using “C” (concurrent measurement) commands rather than “M” (measurement) commands. Try re configuring your logger to use “C” command, or contact your logger supplier for assistance.
By default 120cm EnviroProbes return measurements from 10, 20, 30, 40, 50, 60, 80, 100 and 120cm depths when presented with ” M” commands.
By default 160cm EnviroProbes return measurements from 10, 20, 40, 60, 80, 100, 120, 140 and 160cm depths when presented with ” M” commands.

How many EnviroPro® probes can I connect to my logger?2019-11-19T12:39:36+09:30

The EnviroPro® probes are SDI-12 compliant. This standard can support up to 62 unique node addresses, or 62 individual sensor devices, including any devices other than EnviroPro® soil probes.
However, the number of probes you can connect to your logger is ultimately dependent on the logger and how many it can support. There are memory and power considerations and other factors that determine this limit.

Which logger can I connect my EnviroPro® soil probes to?2019-09-05T17:04:57+09:30

Any SDI-12 compliant logger can be connected to EnviroPro® soil probes.

What is the maximum cable length we can use to connect EnviroPro® probes to a logger?2019-09-05T17:05:24+09:30

The SDI-12 standard states –
“The SDI-12 bus is capable of having at least 10 sensors connected to it, each with 200 feet of cable. With fewer sensors, longer cable lengths are possible.”
EnviroPro® sensors have been designed to meet or exceed this standard.
EnviroPro® cannot guarantee cable lengths beyond this specification, since the number of devices, the types of devices, and the cable guage used can all affect the performance of the SDI-12 bus being used.

Do EnviroPro® soil probes support RS485?2019-09-05T17:06:12+09:30

Providing the protocol layer is still SDI-12 compliant, an RS485 half duplex hardware implementation may be used. EnviroPro® can provide an SDI-12 to RS485 converter if required. (Contact Entelechy or your supplier for more information.)

What is the expected life of an EnviroPro® soil probe?2019-09-05T17:06:48+09:30

Our soil probes are fully encapsulated, providing long term stability and immunity to environmental damage and aging. They are manufactured to the highest standards and are designed with accuracy, repeatability and long term durability being paramount. They carry an un-paralleled 5 year warranty against defect or failure and should be expected to last many, many years beyond that.

What kind of maintenance do EnviroPro® soil probes require?2019-09-05T17:16:23+09:30

None. EnviroPro® soil probes are completely maintenance free.

Will EnviroPro® soil probes ever need re-calibrating?2020-02-26T17:21:58+09:30

No. Every EnviroPro® soil probe has been individually factory-calibrated for life. This ensures life-time sensor to sensor and probe to probe repeatability, which is imperative when collecting data in multiple locations and over long periods in order to identify trends based on historical events.

Please note that factory calibration is different to soil type calibration, which should be done using soil from the install site at the time of installation.

How do I relocate an EnviroPro® soil probe?2019-10-30T13:26:02+09:30

EnviroPro® probes may be removed and relocated using EnviroPro® removal and installation tools.

For instructions on how to extract and install EnviroPro® probes, please see our Installation Manual

Do EnviroPro® soil probes come with a warranty?2019-11-19T12:48:48+09:30

Yes. EnviroPro® soil probes are warranted against manufacturing defects or failure for a period of 5 years from date of purchase.
Contact your supplier in the event that you need to return products under warranty.

What is an EPCD (EnviroPro® Configuration Dongle) and what is it used for?2019-10-29T17:18:30+09:30

An EPCD is an accessory that connects an EnviroPro® probe to a computer to assist in easily configuring or upgrading EnviroPro® soil probes.
They can also to be used to read and display instantaneous readings from EnviroPro® probes, independently of loggers, as well as re-configure probes or carry out basic diagnostics.

What do the EnviroPro® cable colours mean?2019-12-13T17:08:24+09:30
Red: +7 to +16VDC
Black:  0V
Blue: Data
Yellow: Not connected (reserved for future use)
Do both Pro and Standard models utilise salinity compensation?2020-03-16T15:58:02+09:30

Yes, all EnviroPro probes utilise salinity error correction. Without salinity compensation, all capacitance probes will read higher than the actual moisture content in saline soil.
Irrigation decisions based on the over reporting of moisture content could damage crops or cause significant yield volume or quality loss.

Pro models have the added ability to output salinity (EC) metrics to allow for monitoring of salinity leaching and fertiliser events.

How many soil probes do I need?2020-08-20T15:40:18+09:30

This depends on a large variety of factors, so there is no single answer for all cases. The purpose of your soil monitoring system and therefore your accuracy requirements, as well as site-specific characteristics such as soil types, topography and weather factors, all influence the number of soil probes required.  The best way to know how many sensors you require is to consult your agronomist or telemetry provider.




EnviroPro® Reseller Access

EnviroPro® Resellers can get access to more useful downloads and content such as application forms and compliance documents with a Reseller Access login.

This content is for members only.



  • Unit 4/8 Aristotle Close
    Golden Grove SA
    5125 AUSTRALIA
  • Phone: +618 8251 7559
    Fax: +618 8251 5519