Vaisala MAWS201 User's Guide Page 37

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Chapter 2 ___________________________________________________________Product Overview
VAISALA ________________________________________________________________________ 35
to the sensor. The sensor is a high-quality blackened thermopile with a
flat spectral response. Heating of the sensor by incoming solar
radiation produces a signal in the microvolt range.
QMN101
0105-024
Figure 18 QMN101 Net Radiation Sensor
QMN101 Net Radiation Sensor is designed for routine measurements
of net radiation. Net radiation is the balance between incoming and
outgoing radiation in outdoor conditions. The sensor measures solar
and far infra-red radiation balance.
The sensor is based on a thermopile and it consists of two Teflon-
coated, weather-resistant black conical absorbers. The voltage output
is proportional to the net radiation. Contrary to common instruments,
QMN101 is virtually maintenance-free as it does not require fragile
plastic domes.
Soil Temperature Sensors
QMT103
9901-012
Figure 19 QMT103 Soil/Water Temperature Sensor
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