Table 1 lists maximum service temperatures for long term exposures of bare wire thermocouples.
For very short exposure times, temperatures of the fine gage thermocouples can be as high as
the permissible temperatures for the 0.8 mm (0.032") diameter thermocouples.
** Do not expose to oxidizing atmospheres.
*The time constant is defined as the time required to reach 63.2% of an instantaneous temperature
change. The data for Table 2 are obtained by measuring the time required for a Type J fine gage
thermocouple to reach 63.2% of its final temperature when its junction is alternately exposed to two
different temperature levels. In this case, the time constant was measured for exposures between
427°C (800°F) and 38°C (100°F) air between 93°C (200°F) and 38°C (100°F) water.
Fine Gage Thermocouples
OMEGA® fine gage thermocouples are used whenever
fast, accurate temperature measurements are required.
The fine wire diameters enable accurate temperature
measurements without disturbing the base temperature
of the body, in which the installation is made, by
keeping heat transfer via the leads to a minimum.
Also, the fine junction permits accurate “pin-pointing”
of the measured values. They are available in wire
sized ranging from 0.0005" to 0.032" in diameter.
All fine gage thermocouples are made from carefully
selected materials. To insure consistent thermoelectric
properties, each package contains thermocouples
made from matched pairs of wire within the same lot
number. When specified, several packages of
thermocouples made from the same lot number can
be supplied at no extra charge.
While thermocouple response is a function of medium of
submersion, wire diameter, alloy type and temperature
level, it is possible to use Table 2 as a guide for
comparing the various wire size thermocouples.
Important Ordering Notes
Base Metal Thermocouples Prices given for 12 inch lengths (package of 5).
Other sizes and lengths are available on special order. A 12 inch length corresponds
to a 24 inch loop. To order longer lead lengths for base metal calibrations,
add $4 per foot per package.
Platinum/Rhodium Thermocouples Prices given for 6 inch lengths (sold individually).
Other sizes and lengths are availableon special order. A 6 inch length corresponds
to a 12 inch loop. To order longer lead lengths for Pt/Rh calibrations, see the table below.
Base Metal Calibrations: 300 mm (12") Length Standard
All dollar amounts on this site are shown in Canadian currency.Note: 0.0005" diameter wires supplied with 8" leads, maximum length 12". Shorter lead is negative lead.. Thermocouples .005" Dia and larger are made with Special Limits of Error Wire. Order Thermocouples insulators separately, eg DH-1-24 Ordering Example: (1) IRCO-003 J Type Thermocouple, Unsheathed, Diameter: 0.003, CAD58.00
Part Number Builder
Build Your Part Number Below
Thermocouple Type select from: IRCO for J Type CHAL for K Type COCO for T Type CHCO for E Type OPON for N Type P13R for R Type P10R for S Type P30R for B Type
Wire Diameter select from: 0005 for 0.0005" Diameter (For K and E Type Only) 001 for 0.001" Diameter 002 for 0.002" Diameter 003 for 0.003" Diameter 005 for 0.005" Diameter 008 for 0.008" Diameter(For R and S type only) 010 for 0.010" Diameter 015 for 0.015" Diameter 020 for 0.020" Diameter 032 for 0.032" Diameter
Note: All combinations may not be valid, check spec sheet for valid part numbers.