Fine Gage Bare Wire Thermocouple Elements (Pack of 5)
Unsheathed Fine Diameter Thermocouples for fast response. Diameters down to 0.025 mm. High Accuracy. Pin-Point Measurements. Low Heat Transfer. More
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OMEGA™ fine-diameter 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 diameters ranging from 0.05 mm to 0.81 mm. All fine-gauge thermocouples are made from carefully selected materials. To ensure consistent thermoelectric properties, each pack contains thermocouples made from matched pairs of wire within the same batch number. When specified, several packs of thermocouples made from the same batch 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.
Base Metal Thermocouples. (Supplied in packs of 5)
Prices given for 300mm lengths. Other diameters and lengths are available on special order. A 300mm length corresponds to a 600mm loop.
Platinum/Rhodium Thermocouples. (Supplied individually)
Prices given for 150mm lengths. Other diameters and lengths are available on special order. A 150mm length corresponds to a 300mm loop.
You can order the probe, including the installation of connector. Put the required connector in the basket together with the probe. If needed, order the required connector separately, see "Related Products" below.
Complete informations can be found in the spec sheet (PDF), see the "Download" section.
SPECIFICATIONS:
Table 1:
Maximum Service Temperature
Thermocouple Type |
0.13 mm (0.005") |
0.38 mm (0.015") |
0.51 mm (0.020") |
0.81 mm 0.032 |
J** K N T E R,S B |
315°C 593°C 593°C 149°C 315°C - - |
371°C 871°C 871°C 204°C 426°C - - |
371°C 871°C 871°C 204°C 426°C 1450°C 1700°C |
482°C 982°C 982°C 260°C 593°C 1450°C 1700°C |
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 diameter thermocouples.
** Do not expose to oxidizing atmospheres.
Table 2:
Response Time *
Wire Size mm |
Still Air 427°C/38°C |
60 ft./sec Air 427°C/38°C |
Still H2O 93°C/38°C |
0.025 0.125 0.381 0.75 |
0.05 sec 1.0 sec 10.0 sec 40.0 sec |
0.004 sec 0.08 sec 0.80 sec 3.2 sec |
0.002 sec 0.04 sec 0.40 sec 1.6 sec |
*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 and 38°C air between 93°C and 38°C water.
Thermocouple Sensor / What is a Thermocouple?
A thermocouple is a sensor for measuring temperature. This sensor consists of two dissimilar metal wires, joined at one end, and connected to a thermocouple thermometer or other thermocouple-capable device at the other end. When properly configured, thermocouples can provide temperature measurements over wide range of temperatures.
Thermocouples are known for their versatility as temperature sensors therefore commonly used on a wide range of applications...
How is Temperature Measured?
Temperature can be measured via a diverse array of sensors. All of them infer temperature by sensing some change in a physical characteristic. Six types with which the engineer is likely to come into contact are: thermocouples, resistive temperature devices (RTDs Pt100 and thermistors), infrared radiators, bimetallic devices, liquid expansion devices, and change-of-state devices.
Choose the right temperature measurement instrument for your application...
What is a Type K Thermocouple?
What Are Common Applications for Thermocouples?
Thermocouples are the most widely used temperature sensors on the planet due to their combination of wide temperature capabilities, ruggedness, and low cost. Thermocouples are used in applications that range from home appliances to industrial processes, to electric power generation, to furnace monitoring and control, to food and beverage processing, to automotive sensors, to aircraft engines, to rockets, satellites and spacecraft.
When it comes to high temperatures, small size, fast response, high vibration or shock, most times you will find thermocouples providing the temperature measurements.
eBook / Automotive
OMEGA is an industrial sensor and measurement solutions provider with over 50 years of experience. With the ability to provide a complete range of instruments and engineering services it would be difficult to find a better partner for the automotive industry.
OMEGA has a track record of providing state-of-the-art sensors and measurement instrumentation for the automotive industry. With our vast experience and knowledge in industrial applications and development of high quality measuring instruments, sensors and complete solutions...
Common Techniques to Calibrate Thermocouples
Temperature measurement is possible through several means. We commonly use thermometers for measuring temperature. However, for precision measurements, where even a small spike in temperature requires to be recorded, we use advanced forms of measurement devices like thermocouples. Thermocouples are measurement devices that can read very slight temperature changes. Hence, they are widely used in applications where accuracy is of utmost importance.
However, like any measurement device, the efficiency of thermocouples will deteriorate overtime under constant use. At this point, the thermocouple needs recalibration...
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