SLIDE 1
Temperature Pyrometer Sara Gunnarsson Niklas Nilsson History - - PowerPoint PPT Presentation
Temperature Pyrometer Sara Gunnarsson Niklas Nilsson History - - PowerPoint PPT Presentation
Temperature Pyrometer Sara Gunnarsson Niklas Nilsson History Oldschool pyrometer - uses expanding metal bars Optical pyrometer principle Optical pyrometer principle Simple radiation pyrometer Photomultiplier tube Usable in wide ranges
SLIDE 2
SLIDE 3
Optical pyrometer principle
SLIDE 4
Optical pyrometer principle
SLIDE 5
Simple radiation pyrometer
SLIDE 6
Photomultiplier tube
- Usable in wide ranges
- When a photon hits the electrode it
emits an electron which multiplies and creates a current
SLIDE 7
Modern radiation pyrometer
Stefan-Boltzmanns law Emissivity varies with wavelength and material
- Selective radiation pyrometer
- one wavelength
- Total radiation pyrometer
- all infrared wavelengths
SLIDE 8
Accuracy, connections, cost
- Many different types with different ranges
- Many handheld devices, some connected
via USB or serial (RS232) for monitoring and configuration
- Price from 200 SEK depending on range and
accuracy
- Range is roughly -20°C to 3000°C
- Accuracy usually from 0,1°C up to 0,5°C