Thermocouples
Type J (Iron–Constantan) - Temp range: ~0°C to 750°C
- Good sensitivity, affordable
Type K (Chromel–Alumel) - Temp range: up to ~1200°C
- Most widely used
- Good durability + wide range
Type T (Copper–Constantan) - Temp range: -200°C to 350°C
- High accuracy at lower temps
Type E (Chromel–Constantan) - High output signal (more sensitive)
- Good for precise measurement
Type E (Chromel–Constantan) - High output signal (more sensitive)
- Good for precise measurement
Bayonet Thermocouples - Spring-loaded
- Easy insertion/removal
Ring / Lug Thermocouples - Mounted under bolts
- Direct surface contact
Probe Thermocouples - Inserted into drilled holes
- Accurate internal measurement
Surface Thermocouples - Measures external surface temp
- Used where drilling isn’t possible
Flexible / MI (Mineral Insulated) Thermocouples - Flexible, high temp resistant
- Stainless steel sheath
- Used in tight or complex areas
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Selection Logic (So you don’t randomly pick Type K for everything like everyone else)
- General molding → Type K
- Budget / older systems → Type J
- High accuracy low temp → Type T
- Precision measurement → Type E
- High stability / modern setups → Type N
