The primary difference between Type J and Type K thermocouples is the measuring range, and the sensitivity. Type K is the most common general purpose thermocouple with a sensitivity of approximately 41 μV/ degrees C. A wide variety of probes are available in its −50 degrees C to +900 degrees C / -58 degrees F to +1652 degrees F range. Type K wire color standard is yellow + and red -. Type J has a more restricted range of −50 to +400 degrees C, but higher sensitivity of about 50 μV/ degrees C. Type J wire color standard is white + and red -. Specifications Immersion & General Purpose Type Application Temperature Range Dimensions K Small -50 to 300 degrees C-58 to 572 degrees F Handle Length: 4.5 114 mmProbe Length: 4 102 mmProbe Diam: 2 mmCord Length: 40 Comparison Chart Comparison Chart
| Country of Origin (subject to change) | Taiwan, Province of China |
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| Package Quantity | 1 |