Vaisala WMS302 Betriebsanweisung PDF herunterladen (Seite 43)

Chapter 2 __________________________________________________________ Product Overview

VAISALA_______________________________________________________________________ 41

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/Water Temperature Sensors

9901-012

Figure 28 Soil/Water Temperature Sensor

Soil/Water Temperature Sensor is particularly intended for precision

measurement of ground and soil temperatures. All the materials have

been carefully selected to withstand various environmental stress and

wide temperature range. The measurement accuracy and stability of the

temperature sensor are based on a Pt-100 type sensor element specified

to 1/4 DIN 43760B preciseness level.

The QMT103 sensor includes a 5-meter cable with a black, weather-

resistant polyurethane (PUR) sheath, which can tolerate both abrasive

wear and extreme temperatures. Molded to the other end of the cable

there is a 5-pin watertight connector, providing for instant assembly and

replacement.

The QMT110 sensor includes a 10-meter cable with a black, weather-

resistant polyurethane (PUR) sheath, which can tolerate both abrasive

wear and extreme temperatures. Molded to the other end of the cable

there is a 5-pin watertight connector, providing for instant assembly and

replacement.

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Vaisala WMS302 Betriebsanweisung Seite 43