METER TEROS 21 - Product Introduction

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TEROS 21
1. INTRODUCTION
Thank you for purchasing the TEROS 21 Soil Water Potential Sensor from METER Group.
TEROS 21 was designed to be a maintenance-free matric potential sensor designed for long-
term, continuous field measurements. The TEROS 21 measures the dielectric permittivity of
a solid matrix to determine the water content of the solid matrix. The relationship between
water content and matric potential, known as the soil moisture characteristic curve, is used
to calculate the soil matric potential. This measurement approach, along with the calibration
process used in production, allows for accurate measurements of water potential.
Prior to use, verify the TEROS 21 arrived in good condition.