R1111
0 Tubes in archive
BrandSylvania
ClassPirani Tube
BaseUnpolarized
Construction
EnvelopeNonex Glass
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Audio Performance
Key Features
- High temperature coefficient of resistance
- Rapid, continuous readings
- Sensitive as a leak detector
- No failure due to atmospheric exposure
- Compact design
Application Notes
The SYLVANIA Pirani Tube, type R1111, measures vacuum pressures down to 1 micron. For best performance, it should be used in matched pairs in a bridge circuit. One tube is sealed to the system under test while the other acts as a compensator for voltage and ambient temperature variations.
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