Measuring soil pH

pH probes for soil analysis

Soil pH is a measure of the acidity or alkalinity of the soil. Having the correct pH is important for healthy plant growth as it reflects the chemical conditions. For example, the pH controls the availability of nutrients. The solubility of certain elements increases by lower pH levels, slowing down or stopping root growth. Also, biological functions, microbial activity, and the behavior of chemicals is controlled by the pH levels. Knowing this, it is wise to check the soil pH frequently.

Sentron provides robust pH probes for soil analysis. The LanceFET probe, thanks to its stainless steel tip, is perfectly suited for piercing applications. After predrilling a hole in the earth, the ConeFET probe with a blunt tip can also be used to measure the pH in the soil. The ConeFET pH is a general purpose probe with a conical tip designed to be used for a wide range of pH sensing applications.

ISFET technology

The Sentron pH probe sensors are based on their proprietary ISFET (ion selective field effect transistor) technology that offers accurate and reliable pH measurement for demanding applications. The positions of the ISFET sensor and reference electrode have been designed to be clog and pollution resistant. In the event debris has accumulated on the sensor it can be easily cleaned with running tap/deionized water and soft toothbrush, which is of benefit for the probe’s performance and prolonged life.