108
108
OrderableTemperature Probe
Pricing
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Configuration
- w/3m (10 ft) per Sensor w/Ferrules on Wires-3mPart Number: 45001-3m
- w/5m per Sensor108-5mPart Number: 45001-5m
- w/10m (33 ft) per Sensor108-10mPart Number: 45001-10m
- w/20m per Sensor108-20mPart Number: 45001-20m
- w/30m per Sensor108-30mPart Number: 45001-30m
Select a configuration to add to your quote
- Model:
- 108
- Item Number:
- 45001
- Warranty:
- 1 year
Overview
The 108 is a rugged, accurate probe that measures temperature of air, soil, or water from -5° to +95°C. It easily interfaces with most Campbell Scientific data loggers and can be used in a variety of applications.
The 108 consists of a thermistor encapsulated in an epoxy-filled aluminum housing. The housing protects the thermistor. allowing you to bury the probe in soil or submerge it in water.
Key Advantages
Can be used in a variety of applications
Product Notes
Benefits
- Versatile product—measures air, soil, or water temperature
- Easy to install or remove
- Durable
- Compatible with AM16/32-series multiplexers, allowing measurement of multiple sensors
Specifications
- Sensor Description
- BetaTherm 100K6A1IA Thermistor
- Tolerance
- ±0.2°C
(over 0° to 70°C range)
- Temperature Measurement Range
- -5° to +95°C
- Steinhart-Hart Equation Error
- ≤ ±0.01°C over measurement range
(CRBasic data loggers only)
- Polynomial Linearization Error
- Typically < ±0.5°C over -5° to 90°C range
(Edlog data loggers only)
- Time Constant in Air
- 30 to 60 s
(in a wind speed of 5 m s-1)
- Maximum Submergence
- 15 m
(50 ft)
- Maximum Cable Length
- 305 m
(1000 ft)
- Probe Diameter
- 0.76 cm
(0.3 in.)
- Probe Length
- 10.4 cm
(4.1 in.)
- Weight
- 136 g
(5 oz) with 3.05 m (10 ft) cable
Accessories
(5)RAD06
6-Plate Solar Radiation Shield
Orderable41303-5A
6-Plate Solar Radiation Shield
OrderableSPTEMPCAL
Single-Point Calibration of Temperature Sensor at 25°C
OrderableSPTEMPCAL2
Two-Point Calibration of Temperature Sensor at 0°C and Room Temperature
Orderable39116
DIN Rail Terminal Kit with 2 Terminals and 4 Wires
Orderable
Common Accessories
(3)41303-5A
6-Plate Solar Radiation Shield
When exposed to sunlight, the 108 must be housed in a radiation shield. The 41303-5A 6-plate radiation shield attaches to a crossarm, mast, or a pipe with a 1.0" to 2.1" OD.
OrderableRAD06
6-Plate Solar Radiation Shield
When exposed to sunlight, the 108 must be housed in a radiation shield. The RAD06 uses a double-louvered design that offers improved sensor protection from driving rain, snow, and insect intrusion. It also has lower self-heating in bright sunlight combined with higher temperatures (> 24°C (~75°F)) and low wind speeds (< 2m/s (~4.5 mph)), providing a better measurement.
Orderable39116
DIN Rail Terminal Kit with 2 Terminals and 4 Wires
The 39116 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires four wires for connection. This kit provides the following wires: black, purple, red, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable
Services
(2)SPTEMPCAL
Single-Point Calibration of Temperature Sensor at 25°C
A single-point calibration, STEMPCAL, is available when a thermistor has been purchased to determine offset at 25°C. (Calibration can be made at a different value if requested by purchaser.) Calibration uncertainty is ±0.05°C. Calibration after purchase requires an RMA (Return Material Authorization).
OrderableSPTEMPCAL2
Two-Point Calibration of Temperature Sensor at 0°C and Room Temperature
A two-point calibration, STEMPCAL2, is available when a thermistor has been purchased. The standard two-point calibration determines offsets at 0°C and 20 to 25°C (room temperature) with an uncertainty of ±0.05°C. If a sensor uses a different temperature range or an application requires the calibration to be made at different temperature values, different temperature points can be specified when the service is requested. Calibration after purchase requires an RMA (Return Material Authorization).
Orderable
Compatibility
Data Logger Considerations
One single-ended channel per probe is required; an excitation channel can be shared by several probes.
Installation Considerations
Air Temperature
When exposed to sunlight, the 108 should be housed in a 41303-5A, 41303-5B, or RAD06 6-plate radiation shield. The louvered construction of these radiation shields allows air to pass freely through the shield, thereby keeping the sensor at or near ambient temperature. The shields’ white color reflects solar radiation.
The RAD06 uses a double-louvered design that offers improved sensor protection from driving rain, snow, insect intrusion and has lower self-heating in bright sunlight combined with higher temperatures (> 24°C [~75°F]) and low wind speeds (< 2 m/s [~4.5 mph]), giving a better measurement.
The 41303-5A and RAD06 attach to a crossarm, mast, or user-supplied pipe with a 2.5 to 5.3 cm (1.0 in to 2.1 in.) outer diameter. The 41303-5B attaches to a CM500-series pole or a user-supplied pole with a 5.1 cm (2.4 in.) outer diameter.
Soil Temperature
The 108 is suitable for shallow burial only. Placement of the sensor’s cable inside a rugged conduit may be advisable for long cable runs—especially in locations subject to digging, mowing, traffic, use of power tools, or lightning strikes.
Water Temperature
The sensor can be submerged to 15 m (50 ft) or 21 psi. Please note that the 108 is not weighted. Therefore, the installer should either add a weighting system or secure the sensor to a fixed, submerged object, such as a piling.
Multiplexers
To measure large numbers of probes, the AM16/32B multiplexer is recommended.
Related Resources
Case Studies
Documents
- Manual
108 Temperature Probe
September 2025
View Document - Manual
108 Product Manual (online)
September 2025
View Document - Compliance
107, 108, and 109 EU Declaration of Conformity
August 2016
View Document - Technical Paper
Using Thermistor Temperature Sensors with Campbell Scientific Dataloggers
View Document
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