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TEROS 12
Measurement Duration
Minimum 25 ms
Typical NA
Maximum 50 ms
COMPLIANCE
Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)
2014/30/EU and 2011/65/EU
EN61326-1:2013 and EN55022/CISPR 22
3.2 COMPONENTS
The TEROS 12 sensor measures soil moisture, temperature, and EC of soil using stainless
steel needles (Figure4). TEROS 12 sensors measure soil moisture between Needle 1 and
Needle 2 and EC between Needle 2 and Needle 3. Temperature is measured with an
embedded thermistor in Needle 2. These sensors have a low power requirement, which
makes them ideal for permanent burial in the soil and continuous reading with a data logger
or periodic reading with a handheld reader.
Ferrite
core
Needle 1
Thermistor
Needle 2
Needle 3
VWC
EC
Figure4 TEROS 12 sensor
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