Catalogue - Sensor catalog - Watlow - (Version JPG)

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Band heater, Radiant heater, Tubular heater, Thermocouple wire, Cable

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General Information

Tolerances

Sheath Tolerances


General Application & RTD Sheath Tolerances
■	Sheath Diameter (in.)	Diameter Tolerance (in.)	Length Tolerance (in.)
%		± 0.003	± 0.125
		± 0.003	± 0.125
		± 0.003	± 0.125
%		± 0.003	± 0.250

	MI Thermocouple Sheath Tolerances
			Length Tolerance (in.)
	Diameter (in.)	Diameter Tolerance (in.)	up to 24 in.	over 24 in.
0.020		+ 0.001 - 0.0005	± 0.25	± 1%
0.032		+ 0.001 - 0.0005	± 0.25	± 1%
0.040		+ 0.001 - 0.0005	± 0.25	± 1%
0.063		+ 0.001 - 0.0001	± 0.125	± 12%
0.125		+ 0.002 - 0.0001	± 0.125	± 12%
0.188		+ 0.002 - 0.0001	± 0.125	± 12%
0.250		+ 0.003 - 0.0001	± 0.125	± 12%
0.375		+ 0.003 - 0.0001	± 0.125	± 12%
0.500		+ 0.003 - 0.0001	± 0.125	± 12%

Sheath Tolerances

Length and diameter are important features for proper installation of temperature sensors. The tables provide the tolerances on these key dimensions of Watlow catalog sensor products.

Flexible Lead Tolerances

General Application, MI Thermocouple & RTD Lead Lead Length (in.) I ToT ~ ~


	Under 6	+ 1 - 0
	6 to 24	+ 2 - 0
	Over 24 to 120	+ 6 - 0
	Over 120	+ 5% - 0

Sheath Configuration MI Thermocouple Standard Sheath Configuration


Standard shipping methods and	Sheath	Standard
element strength require long length	Diameter	Length
mineral insulated sensors to be	in.	in.	Configuration
shipped in coil format. This chart	0.020	Up to 20	Straight
provides the standard sheath	0.032	From 20 to 170	3 in. coil
configuration by diameter.		170 to 300	6 in. coil
		greater than 300	9-10 in. coil
	0.040	Up to 20	Straight
		From 20 to 120	3 in. coil
		120 to 200	6 in. coil
		Greater than 200	9-10 in. coil
	0.063	Up to 50	Straight
		50 to 540 (45 feet)	9-10 in. coil
		Greater than 540 (45 feet)	24 in. coil
	0.125	Up to 96	Straight
	0.188	Greater than 96	24 in. coil
	0.250

Sensor catalog - Watlow - #36

Band heater, Radiant heater, Tubular heater, Thermocouple wire, Cable