Campbell Manufacturing TEMPERATURE PROBE 109SS User Manual

The 109SS is suitable for shallow burial only.  It should be placed horizontally 
at the desired depth to avoid thermal conduction from the surface to the 
thermistor.  Placement of the 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. 

The 109SS can be submerged to 50 ft.  Please note that the 109SS is not 
weighted.  Therefore, the installer should either add a weighting system or 
secure the probe to a fixed or submerged object such as a piling. 

Connections to Campbell Scientific dataloggers are given in Table 4-1.  
Temperature is measured with one Single-Ended input channel and a Voltage 
Excitation channel.  Multiple probes can be connected to the same excitation 
channel (the number of probes per excitation channel is physically limited by 
the number of lead wires that can be inserted into a single voltage excitation 
terminal, approximately six). 

Black Excitation 

Switched 
Voltage 
Excitation 

Switched 
Voltage 
Excitation 

Switched 
Voltage 
Excitation 

Red Temperature 

Signal 

Single-Ended 
Input 

Single-Ended 
Input 

Single-Ended 
Input 

Purple Signal 

Ground 

 

 

AG 

 

 

Clear Shield 

 

 

G 

 

 

 

This section is for users who write their own datalogger 
programs.  A datalogger program to measure this sensor can be 
generated using Campbell Scientific’s Short Cut Program 
Builder software.  You do not need to read this section to use 
Short Cut.