HD2 Moibile Moisture Meter for Soils
 HD2 Moibile Moisture Meter for Soil

The IMKO HD2 - measuring the soil moisture content, the soil conductivity EC, and the level of salt contamination can now be performed as fast and easy as never before!

Within two seconds, the moisture content value, the temperature, and the soil conductivity EC are displayed on the clear display. The probe TRIME-PICO64 measures with the new TRIME®-radar technology (Time-Domain-Reflectometry).

  • All of the TRIME-PICO probes can be connected to the HD2: TRIME-PICO 64, TRIME-PICO 32 und TRIME-PICO IPH T3/44.
  • The TRIME-PICO probes can now report soil EC as standard simultaneously with soil moisture content percentage.
  • The TRIME probes measure conductivity with the same large soil volume as it will be used for the TDR moisture measurement.
  • Both durable and waterproof construction ensures safe handling even under difficutl environmental conditions.


  1. TRIME probes measure conductivity with the same large soil volume as it will be used for the TDR moisture measurement. The contact of the probe rods inside the soil is far less critical as with "galvanic" EC probes with a point to point measurement where even small air gaps lead to significant deviations.
  2. - TRIME probes use coated and therefore isolated rods which guarantee the non-appearance of galvanic accumulation along the rods allowing for long-run installations over many years. Unisolated rods means there is a risk of galvanic reactions and possible influence on the sensor´s reading with serious problems when the probes must be removed from larger depths due to a rod cleaning.
  3. - TRIME probes measure moisture and conductivity very precisely at a frequency of 1GHz with a better and more exact separation of moisture and conductivity in comparison to capacitive probes with lower frequencies. This means that in practice, a reliable determination of the pore water conductivity ECw and respectively TDS (mg of salt per liter water) is possible at different moisture levels.
  4. All TRIME probes work with a concurrently basic calibration for moisture and conductivity. This allows a check of the limits of saline stress in soils according to standards of FAO2006 for specific soils.


For agricultural and horticultural soils, the measurement of Electrical Conductivity is an immensely important measurement. Electrical Conductivity measures the amount of total dissolved salts (TDS) or total dissolved ions in water. To complicate matters, some ions such as Sodium and Chloride will contribute more to EC than others such as Phosphorus and Potassium.

Plants require nutrients such as Nitrogen, Phosphorus, Potassium, Magnesium in large quantities hence they are called major nutrients and also smaller amounts of elements such as Iron, Manganese , Molybdenum and these are called micro nutrients or sometimes referred to as trace metals. Fertilisers are supplied to plants as compounds for example Ammonium Nitrate which supplies Nitrogen in the form of Nitrate or Ammonium. Micro-organisms will break down these compounds so they are more readily available for uptake by the plants. Levels of some ions such as Chlorides are less desirable and in great quantities can be harmful to plant growth. The quantity of ions or salts in a soil is of huge importance. Too much or too few nutrients will create a restriction in plant growth.

IMKO has studied the subject in detail and has come up with a breakthrough. By using coated rods and measuring over the length of the probes, all TRIME probes can now accurately report what IMKO calls ECTRIME. This measurement takes account of soil moisture and conductivity by volume. Because soil moisture is so important in the calculation of EC, all different TRIME probes now incorporate TDR calibration curves for a selection of soils. Special graphs have been constructed so that the user can convert the ECTRIME reading to grams/litre of dissolved salt. So far curves are available for sandy and loam soils and it is intended to produce a handful of curves to cover most situations. At this moment in time, conversion of ECTRIME to mg/l TDS is done manually.

IMKO hopes that this breakthrough whereby a TDR instrument can be used to derive a true soil EC measurement will become the new standard for soil fertilisation analyses.

 Accurate - Robust- Wireless

The innovative solution for mobile moisture measurement

  • Wireless Class 2 Bluetooth module
  • Connectable Probes: PICO64, PICO32, PICO-IPH/T3
  • Up to 10 meter range
  • Optimal power management
  • Number of measurements with one charge: > 1500

Use PICO-BT with Bluetooth technology to control your PICO sensor and save measurement data on any commercially available PDA with Bluetooth and Windows Mobile. PICO-BT is specially designed for heavy duty applications and functions even in the most extreme conditions. The integrated Class 2 Bluetooth module enables you to easily obtain a range of 10 metres.

The internal rechargeable battery is also the power supply for your PICO sensor. Up to 1500 measurements are possible when fully charged depending on the application profile. A quick look at the 4 LEDs on the face of the instrument always keeps you informed about which actions are being performed at a particular time. Operating PICO-BT couldn’t be easier. The PICO-BT module is immediately ready to use at the touch of a button.

PICO-TALK the management software for PICO sensors
Your Bluetooth module PICO-BT includes our easy-to-use PICO-TALK software for Microsoft® Windows Mobile®. To make it even easier to operate we can provide the software in 3 different languages: German, English, and Chinese.
PICO-TALK’s individual menus are set out clearly and can all be reached with a single touch of your fingertip.

Rapid and simple measurements
Simply insert your TRIME-PICO sensor into the ground and start the measurement process by pressing your PICO-TALK software’s “MEAS” button. You receive an accurate moisture reading within only 2 seconds. In the case of buried sensors you also receive a reading for the soil temperature. The readings are saved directly in the system along with the time and date, enabling you to track what was measured when.

Save readings reliably
You also have the option of giving a specific designation to measuring locations and saving the reading under this name.

Customised calibration
TRIME-PICO sensors are supplied with precise soil calibration and can be used straightaway. If you prefer, you can perform the calibration process yourself and save the results in the sensor. PICO-TALK recognises the saved calibrations in the sensor and displays them in PICOTALK for easy selection.

Effortless export of readings
Do you want to use your readings in other systems? No problem. Your
saved data can be exported easily in any application.


  • Ideal for the development of soil-water balance models, irrigation control and salt content testing at different soil depths
  • Simple and modular configuration
  • Connection of data logger via GPRS wireless modem
  • Rugged design
  • Attractive price / performance ratio

  1. In order to measure precise selected soil horizons, PICO-PROFILE can be configured easily. The modular design allows to arrange up to 10 measurement segments PICO-T3P in such a way that different soil depths on the very interesting soil profile locations can be measured.
  2. Each PICO-T3P segment can be adjusted to the particular soil horizon concerning the calibration.
  3. PICO-PROFILE in addition to measuring soil moisture, measures the electrical conductivity EC of the soil, whereby the determination of the salt content in each soil horizon is possible. The measurement result can be calculated to the pore water conductivity ECw or respectively to TDS (mg of salt per liter water).
  4. With a representative measurement field PICO-PROFILE penetrates deep into the soil around the access tube. Each PICO-T3P segment measures 1dm3 ground.
  5. PICO-PROFILE can be easy connect to the data logger globeLog which allows battery operation for long term storage of data. Optionally, the use of GPRS radio modem and SIM card is possible.
  6. The Rugged design guarantees a long-term operation in harsh environments.
  7. Attractive price/performance ratio compared to conventional sensors allows the use of several measuring segments PICO-T3P per measurement point.
  8. An RS485 interface or optional SDI12 interface allows data acquisition with external data loggers.