Model 107 Temperature Probe
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mount the 107 and limit solar radiation loading. See Section 6, Specifications
(p. 4), for a complete list of compatible dataloggers.
6. Specifications
Features
• Measures air, soil, or water temperature
• Compatible with AM16/32-series multiplexers
• Easy to install or remove
• Durable
• Compatible with the following CRBasic dataloggers: CR300 series,
CR6 series, CR800 series, CR1000, CR1000X series, CR3000, and
CR5000
Sensor Element: Measurement Specialties 100K6A1iA
thermistor
Survival Range: –50 to 100 °C
Measurement Range: –35 to 50 °C
Time Constant in Air: 30 to 60 s in a wind speed of 5 m/s
Maximum Cable Length: 305 m (1000 ft)
Accuracy
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Worst case: ±0.4 °C (–24 to 48 °C)
±0.9 °C (–35 to 50 °C)
Interchangeability Error: ±0.10 °C (0 to 50 °C)
±0.20 °C at –10 °C
±0.30 °C at –20 °C
±0.40 °C at –30 °C
±0.50 °C at –40 °C
Steinhart-Hart
Equation Error: ≤ ±0.01 °C (–35 to 50 °C)
Probe Weight and Dimensions
Weight with 10 ft cable: 136 g (5 oz)
Length: 10.4 cm (4.1 in)
Diameter: 0.762 cm (0.3 in)
Compliance: View the EU Declaration of Conformity at
www.campbellsci.com/107
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Overall probe accuracy is a combination of thermistor interchangeability, bridge-resistor
accuracy, and error of the Steinhart-Hart equation. Bridge resistors have 0.1% tolerance with a
10 ppm temperature coefficient. Interchangeability is the principle component error. If needed,
an estimate of the interchangeability error for 0 to 50 °C, that can be used as the Offset parameter
of the Therm107() instruction, can be determined with a 1-point or 2-point calibration.
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