Sensor and Controller Catalog

Lab Services

Quality Certification Lab

Thermocouple Calibration Watlow offers testing for application temperatures other than the standard points in a range from -100 to 2300°F (-74 to 1260°C), depending on material. Use outside of the temperature limits of ASTM E230 is not recommended.

A lab service technician uses a metallurgical microscope to examine the microstructure of the metallic components in Watlow’s mineral insulated metal sheathed cable, XACTPAK.

Thermocouple Calibration Table

Sensor Type T Thermocouple J Thermocouple E Thermocouple K or N Thermocouple

Temperature 32 to 700°F (0 to 371°C) 32 to 1400°F (0 to 760°C) 32 to 1600°F (0 to 871°C) 32 to 2300°F (0 to 1260°C) -110 to 1200°F (-80 to 650°C)

Specifications

ASTM E220/ASTM E230

ASTM E220/ASTM E230

ASTM E220/ASTM E230

ASTM E220/ASTM E230

PT 385 100Ω RTD

ASTM E644

Notes: • Thermocouple calibrations to ASTM E207 possible (contact factory).

Recommended Sensor Length for Calibration

Temperature -100 to 500°F (-74 to 260°C) 500 to 2000°F (260 to 1093°C) 2000 to 2300°F (1093 to 1260°C)

Minimum Length

Maximum Length

6 in. (150 mm)

60 in. (1525 mm)

18 in. (450 mm)

10 ft (3 m)

20 in. (500 mm)

10 ft (3 m)

Notes: Longer sensors may be calibrated if they are in coil form.

Recommended RTD Length for Calibration Temperature

Minimum Length

Maximum Length

-100 to 500°F (-74 to 260°C) 500 to 1200°F (260 to 650°C)

6 in. (150 mm)

60 in. (1525 mm)

18 in. (450 mm)

10 ft (3 m)

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