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- Thermocouple Type K: NiCr-NiAl thermocouples are suitable for use in oxidising or inert gas atmospheres up to 1,200 °C / 2,192 °F (ASTM E230: 1,260 °C / 2,300 °F) with the largest wire size.
- Thermocouple Type J: Fe-CuNi thermocouples are suitable for use in vacuum, in oxidising and reducing atmospheres or inert gas atmospheres. They are used for temperature measurements up to 750 °C / 1,382 °F (ASTM E230: 760 °C / 1,400 °F) with the largest wire size.
- Thermocouple Type N: NiCrSi-NiSi thermocouples are suitable for use in oxidising atmospheres, in inert gas atmospheres or dry reduction atmospheres up to 1,200 °C / 2,192 °F (ASTM E230: 1,260 °C / 2,300 °F). They must be protected from sulphurous atmospheres. They are very accurate at high temperatures. The source voltage (EMF) and the temperature range are almost the same as with type K. They are used in applications where a longer service life and greater stability are required.
- Thermocouple Type E: NiCr-CuNi thermocouples are suitable for use in oxidising or inert gas atmospheres up to 900 °C / 1,652 °F (ASTM E230: 870 °C / 1,598 °F) with the largest wire size.
- Thermocouple Type T: Cu-CuNi thermocouples are suitable for temperatures below 0 °C with an upper temperature limit of 350 °C / 662 °F (ASTM E230: 370 °C / 698 °F) and can be used in oxidising, reducing or inert gas atmospheres. They do not corrode in moist atmospheres.
Overall Idea of Multi-junction Thermocouple Probe:
SUMMARY What we need to buy:
Type K
Mineral-insulated (MI)
stainless-steel sheathed
multi-junction (5–10 points inside)
1/8" or 3 mm diameter
length = height of tank + extra
terminated to a connector
- Pressure sensor connected to tank through tube
- Might receive some varying pressure readings due to collisions from fluid, but will level out
- Useful for comparing pressure readings when collisions happen
- Pressure transducer + impulse line (stainless tube to prevent damage due to temp)
- Non-wetted setup that prevents the collision readings
- Strain gauge transducer, stainless-steel
- Might receive some varying pressure readings due to collisions from fluid, but will level out
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