The 107-LC consists of a thermistor encapsulated in an epoxy-filled aluminum housing. It measures the range of -35° to +50°C; to measure the -5° to +95°C temperature range, see the 108-LC probe.Read More
The 107-LC is a version of the 107 that has a cable terminated in a connector rather than the standard pigtails. The connector can be attached to the CS110 lightning meter or to the ET107, ET106, or MetData1 weather stations.
The 107-LC consists of a thermistor encapsulated in an epoxy-filled aluminum housing. Its cable terminates in a connector that attaches to the ET107 Weather Station, ET106 Weather Station (retired), or MetData1 Weather Station (retired). The 107-LC measures the range of -35° to +50°C; to measure the -5° to +95°C temperature range, see the 108-LC probe.
The 107-LC is suitable for shallow burial only. It should be placed horizontally at the desired measurement depth to avoid thermal conduction from the surface to the thermistor. Placement of the sensor 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.
p>The 107-LC can be submerged to 50 feet. Please note that the probe is not weighted. Therefore, the installer should either add a weighting system or secure the probe to a fixed, submerged object, such as a piling.
|Sensor||BetaTherm 100K6A1IA Thermistor|
|Tolerance||±0.2°C (over 0° to 50°C range)|
|Temperature Measurement Range||-35° to +50°C|
|Steinhart-Hart Equation Error||≤ ±0.01°C over measurement range|
|Time Constant in Air||30 to 60 s (in a wind speed of 5 m s-1)|
|Maximum Submersion Depth||15.24 m (50 ft)|
|Probe Diameter||0.762 cm (0.3 in.)|
|Probe Length||10.4 cm (4.1 in.)|
|Weight||136 g (5 oz) with 3.05-m (10-ft) cable|
The cable of the 107-LC provides a connector that attaches to the ET107 Weather Station, ET106 Weather Station (retired), or MetData1 Weather Station (retired). The ET107 Weather Station has an on-board CR1000M module. Both the MetData1 Weather Station and ET106 Weather Station have an on-board CR10X module.
Number of FAQs related to 107-LC: 7
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Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:
If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.
All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.
Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model.
The thermistor is located approximately 3 mm (0.125 in.) back from the probe tip.
For both of these services, calibration can be made at different values if it is requested by the purchaser at the time of purchase. In addition, both of these calibration services can be requested after sensor purchase using a return material authorization (RMA) number. To request an RMA number, refer to the Repair and Calibration page.
The sensor/probe consists of a non-linear thermistor configured with a precision resistor in a half-bridge circuit, as shown in the product’s manual:
To measure the sensor/probe, the measurement device has to provide a precision excitation voltage (Campbell Scientific data loggers use 2000 mV), measure the voltage across the precision resistor, determine the thermistor resistance (Ohm's law), and convert the resistance to temperature using the Steinhart-Hart equation.
The Steinhart-Hart equation is 1/T = A + Bln(R) + C(ln(R))3 where:
For the 107-L, 107-LC, 108-L, and 108-LC, the following are the coefficients for the Steinhart-Hart equation:
For the 109-L, the following are the coefficients for the Steinhart-Hart equation:
Note the difference between calibration and a field check. Calibration cannot be done in the field, as it requires an experienced technician and specialized equipment.
Field checks of measurements can be done to determine if the data make sense with the real-world conditions. Follow these steps to field check a sensor:
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact Campbell Scientific for assistance.