5. Overview
The sensor consists of a wire-wrapped, four-wire Pt100 Resistance Temperature Detector (RTD)
element encapsulated in an epoxy-filled, stainless-steel housing. The thin yet robust housing,
combined with the Pt100 sensing element, provide the first true WMO-compliant sensor to meet
the 20-second step response time with an ambient wind speed of only 1 m/s (3.3 ft/s).
The TempVue 20 SDI-12 has a maximum measurement uncertainty of only 0.3 K over the entire
measurement range of –60 to +60 °C, with only 0.1 Kelvin (K) over the most common
temperature range of -40 to +40 °C.
When exposed to environments with high wind, sun, or precipitation levels, the TempVue 20 SDI-
12 must be housed in a radiation shield, such as the RAD06 6-plate shield.
Figure 5-1. TempVue 20 SDI-12 with the cable attached
Features:
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Meets WMO step change response time at 1 m/s (3.28 ft/s)
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Maintains high measurement stability over both time and temperature
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Incredibly easy to install or remove for calibration checks
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Highly durable, providing sensor element protection in even the harshest environmental
conditions
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Compatible with any SDI-12 data logger/controller including Campbell Scientific GRANITE-
series, CR6, CR3000, CR1000X, CR800-series, CR300-series, and CR1000
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Allows for cable length adjustments without the need for calibration changes
TempVue 20 SDI-12 PT-100 Class A, Precision Air Temperature Sensor
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