Thermocouples are available in various types, each with its own measuring range based on the specific combination of metals or alloys used in their construction. Here are the commonly used thermocouple types and their respective measuring ranges:

1. Type K (Chromel-Alumel):

   • Temperature Range: -200°C to +1350°C (-328°F to +2462°F)
   • Type K thermocouples are widely used due to their wide temperature range, good accuracy, and relatively low cost. They are commonly used in industries such as metalworking, manufacturing, and food processing.

2. Type J (Iron-Constantan):

   • Temperature Range: -210°C to +1200°C (-346°F to +2192°F)
   • Type J thermocouples have a slightly more limited temperature range compared to Type K, but they offer better accuracy at lower temperatures. They are commonly used in industrial applications and scientific research.

3. Type T (Copper-Constantan):

   • Temperature Range: -200°C to +400°C (-328°F to +752°F)
   • Type T thermocouples are known for their excellent accuracy and stability at low temperatures. They are commonly used in cryogenic applications, environmental chambers, and HVAC systems.

4. Type E (Chromel-Constantan):

   • Temperature Range: -200°C to +900°C (-328°F to +1652°F)
   • Type E thermocouples offer good accuracy and stability over a moderate temperature range. They are commonly used in laboratory and industrial applications.

5. Type N (Nicrosil-Nisil):

   • Temperature Range: -200°C to +1300°C (-328°F to +2372°F)
   • Type N thermocouples offer similar performance to Type K thermocouples but with better accuracy and stability at high temperatures. They are commonly used in aerospace, automotive, and petrochemical industries.

6. Type R (Platinum-Rhodium):

   • Temperature Range: 0°C to +1600°C (32°F to +2912°F)
   • Type R thermocouples are made of platinum and rhodium and are known for their high accuracy and stability at high temperatures. They are commonly used in high-temperature applications such as furnace and kiln monitoring.

7. Type S (Platinum-Rhodium):

   • Temperature Range: 0°C to +1600°C (32°F to +2912°F)
   • Type S thermocouples are similar to Type R thermocouples but have a slightly different composition. They offer high accuracy and stability at high temperatures and are commonly used in industrial and laboratory applications.

These are some of the most commonly used thermocouple types and their measuring ranges. The selection of a thermocouple type depends on factors such as the required temperature range, accuracy, environmental conditions, and budget constraints.