TCAV-L Averaging Soil Thermocouple Probe

The TCAV-L typically provides the average temperature of the top 6 to 8 cm of soil for energy-balance in flux systems. It parallels four thermocouples together into one 24 AWG wire. Each member of a thermocouple pair can then be buried at a different depth. The two pairs are separated at a distance of up to 1 m.  

Benefits and Features 

Used in conjunction with soil heat-flux plates and soil-moisture probes to compute total soil heat flux 

Category:

The TCAV uses type E thermocouples, which are comprised of a chromel wire and a constantan wire joined at a measurement junction. A voltage potential is generated when the measurement end of the thermocouple is at a different temperature than the reference end of the thermocouple. The magnitude of the voltage potential is related to the temperature difference. Therefore, temperature can be determined by measuring the differences in potential created at the junction of the two wires. 

A reference temperature measurement is required for thermocouple measurements. The temperature sensor built into many of our data loggers’ wiring panel typically provides this measurement. 

Type  Chromel-Constantan 
Typical Output  60 μV/°C 
Accuracy  Refer to the Thermocouple Measurement section in the data logger manual. 
Weight  0.45 kg (1 lb) with 15.24-m (50-ft) cable 

 

Manuals: TCAV-Averaging Soil Thermocouple Probe

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