A combined Pirani and Bayard–Alpert instrument for systems that need pressure measurement from pump-down to ultra-high vacuum. The hot-cathode section uses a double filament.
Shown: Thyracont VSH Pirani and hot-cathode vacuum transducer range. Select the model, sensor, connection and interface required for the application.
Tell us the configuration and quantity you need. Include your process requirements if you would like help with selection.
View quote listA combined Pirani and Bayard–Alpert instrument for systems that need pressure measurement from pump-down to ultra-high vacuum. The hot-cathode section uses a double filament.
Tell us about the chamber, expected gases, bakeout conditions and target pressure. Select the appropriate flange and check the operating procedure for the filament and degassing function.
No. Chamber design, seals, cleanliness, pumping and gas load determine the achievable pressure. The gauge must be matched to that system.
Yes. Tell us the operating range, required test points and certificate requirement. We will confirm the calibration option for the selected instrument before quoting. Discuss vacuum gauge calibration.
Compare cold-cathode / Pirani gauges and vacuum gauge controllers. Check the pressure reference, measurement range and output rather than selecting by connection alone.
For a turbo-pumped chamber, consider the measurement requirement alongside the nEXT85D turbomolecular pump. Measure at the point that matters to the process and select the gauge for the working pressure, gas and interface. A pump’s ultimate-pressure specification is not a substitute for a chamber measurement.
Send the pressure range and reference (absolute or relative), process gas, connection, quantity and required delivery date. Include the existing model or a photograph for replacement enquiries.
Compare vacuum gauge types or enquire about this instrument.
See the Leybold IONIVAC ITR 90 for hot-cathode/Pirani measurement, flange and display options, manufacturer instructions and control requirements. Its full display range is distinct from its specified accuracy band.
| Equipment type | Vacuum gauges & instrumentation / High & Ultra-high Vacuum Gauges |
|---|---|
| Measurement principle | Pirani and Bayard–Alpert; gas-dependent |
| Measuring range | 1000 to 5 × 10⁻¹⁰ mbar |
| Pressure reference | Absolute |
| Accuracy | About ±30% of reading at 1000–10 mbar; ±10% at 10–10⁻⁸ mbar |
| Filament | Yttria-coated iridium; double filament |
| Supply | 20–30 V DC |
| Interfaces | RS485; 0–10 V, EtherCAT or PROFINET versions |
| Connection | DN25 KF, DN40 KF or DN40 CF-F |
| Flange bakeout | Up to 180°C with supply disconnected |
Send the gauge model, pressure range and process details for calibration, replacement or compatibility advice.
Confirm the range, pressure reference, connection, electrical output and whether cables, a controller or calibration are included.
Availability, lead time and the applicable warranty are confirmed for your quotation. A catalogue listing does not reserve stock.
What to check in your quotation · Delivery · Returns and faults
Hot Cathode / Pirani Ultra-high Vacuum Gauges
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Compare the stated conditions as well as the values. A missing specification is not a zero rating; confirm suitability with Girovac.
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