CSC Product Information

Product Information - 109B (Discontinued)

Soil/Water Temperature Probe (-50° to +70°C; suitable for burial)

Model	Cable Length
109B	25 Ft
109B-L	Custom

Manual

General Description

The 109B Temperature Probe uses a thermistor to measure temperature. The 109B probe is designed for use with the CR200(X) series CR800 series, CR1000 , and CR3000 datalogger, which all have a special instruction, the Therm109, for measuring it. The probe can be measured with other Campbell Scientific dataloggers using generic measurement instructions.

The 109B Temperature Probe can measure soil/water temperatures. The probe can be buried in soil (maximum of 86 psi) or submerged in water to 200 feet. The 109BAM is typically used to measure soil or water temperature using a Campbell Scientific datalogger and a multiplexer (i.e. AM16/32B). When using the 109BAM with a multiplexer one pick off resistor is required for each single ended channel used. This will vary depending on the multiplexer configuration and the number of sensors measured.

The -L option on the model 109B-L Temperature Probe indicates that the cable length is user specified.

The standard cable length for the 109B is 25 feet. However, custom lead length for the 109B-L can be specified when the sensor is ordered. Table 1-1 gives the recommended lead length for mounting the sensor on a tripod or tower.

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