TDR Soil Moisture Devices
TRIME P3 rod probes
TRIME offers precision 3-rod probes of different dimensions for the most varied applications when used with the TRIME FM-3 or TRIME ES-3. The standard length of the P3/P3Z probe is 16cm. P3S has a length of 11cm. The rods can be linear or triangular, with a rectangular or round probe body. All rods are PVC-coated to obtain best measuring results even in saline materials (bulk soil electrical conductivity up to 2dS/m). For very high salinities, special high-conductivity-probes (C-versions) are available. For very dense materials in which probes cannot be inserted by hand, a special pre-boring set has been developed for installing rod probes. Should a rod be damaged, it can be easily unscrewed and replaced.
The measuring volume of the rod probes can be described as a “cylinder of influence” with a length comparable to the rods’ length and a diameter comparable to the probe bodies’ diameter. In soils, a measuring accuracy better than 1vol.-% is possible, provided a close contact and no air gaps exist between the measured material and rods The Probes P3 and P3S are designed for use in the upper soil area. Probe P3Z are for use in soil or below soil. 3-rod-probes are not compatible with the TRIME-FM2 version and vice versa. 3-rod probes have the same accuracy and resolution as 2-rod probes.
The unique P3-MR multi-rod probe-head is the cost-saving solution for monitoring moisture at various sites by using one TRIME-FM moisture meter with one probe head for numerous low-cost rod sets. By leaving the rods installed, your measurement location is left intact even after repeated probe insertion. To take measurements, the multi-rod probe-head is simply plugged on to the rods. Protection caps prevent dirt and water entering the small threaded holes in the rods. See details under the P3-MR product section.
Please check Required Options below for details on necessary parts, accessories and software.

Data Sheet
Features/Benefits
160-50-mm rods
Extreme sensitivity
Portable
Applications
Field portable
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Required Options
Parts/Accessories/Software