Pavement Temperature
ET Sensor
Function
An "ET" sensor is a thermistor sensor attached to a EC/EW sensor. See the "EC" or "EW" sensor descriptions for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.ET_VALUES.
RT Sensor
Function
The "RT" designation has been used for two unique sensor types. One represents the thermocouple attached to an MR sensor. The other represents the thermistor attached to a PT sensor. See the "MR" or "PT" sensor descriptions for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.RT_VALUES.
Thermocouple - TC
Function
A "TC" sensor measures the temperature of a material in which it is embedded. Data is automatically collected every 15 minutes. The Thermocouple (TC) sensor is a pair of dissimilar metal alloy wires (copper and Constantine) connected together near the point of measurement. Thermocouples generate an open-circuit voltage, called the Seebeck voltage, which is proportional to the temperature difference between the hot (point of interest) end and a reference junction.
Manufacturer
Omega Type-T thermocouple wire, fabricated into "trees" by MnROAD staff.. 20
Location and Quantity
TC sensors within pavements are typically mounted on a vertical "tree". This mounting method allows vertical temperature profiles to be determined, which are very important to the understanding of pavement response.
Current Status
These sensors continue to function.
MnROAD Database Table
Data was been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database tables: MNR.TC_VALUES (current year), MNR.TC_VALUES_#### (where #### indicates one year of values); or the database view: TC_VALUES_ALL.
TH Sensor
Function
A "TH" sensor is a temperature sensor attached to a MH sensor. See the "MH" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.TH_VALUES.
XB Sensor
Function
A "XB" sensor is a thermocouple sensor attached to a KB sensor, to aid in temperature compensation. See the "KB" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XB_VALUES.
Thermistor in Dynamic Pore Water Pressure Cell - XD
Function
A "XD" sensor is a thermistor attached to a DW sensor to aid in temperature compensation. See the "DW" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data will eventually be loaded into the MnROAD database table: XD_VALUES.
XG Sensor
Function
A "XG" sensor is a thermistor sensor attached to a VG sensor, to aid in temperature compensation. See the "VG" sensor description for more details.
MnROAD Database Table 21
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XG_VALUES.
XH Sensor
Function
A "XH" sensor is a temperature sensor attached to a MH sensor. See the "MH" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XH_VALUES.
Thermistor in Lateral Pressure Cell - XL
Function
A "XL" sensor is a thermistor sensor attached to a PL sensor, to aid in temperature compensation. See the "PL" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XL_VALUES.
XM Sensor
Function
A "XM" sensor is a thermistor sensor attached to a VM sensor, to aid in temperature compensation. See the "VM" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XM_VALUES.
Thermistor in State Pore water Pressure cell - XS Sensor
Function
A "XS" sensor is a thermistor sensor attached to a SW sensor. See the "SW" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XS_VALUES.
Thermistor in Soil Pressure - XT
Function
A "XT" sensor is a thermistor sensor attached to a PT sensor. See the "PT" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XT_VALUES.
XV Sensor
Function
A "XV" sensor is a thermistor sensor attached to a VW sensor, to aid in temperature compensation. See the "VW" sensor description for more details.
MnROAD Database Table
Data has been collected automatically every 15 minutes over the life of each sensor. Data can be found in MnROAD database table: MNR.XV_VALUES.