The IONIVAC ITR 90 combines Bayard–Alpert hot-cathode ionisation and Pirani measurement in one active transmitter. It supports monitoring from atmosphere into ultrahigh vacuum, with automatic switching between measuring systems and analogue/RS232 readout. Choose the flange, local-display option and control arrangement for the installation.
Manufacturer photograph of IONIVAC ITR 90; flange and display depend on the selected variant.
Part of the Leybold IONIVAC hot-cathode gauges family. Compare the range and other model options.
Tell us the configuration and quantity you need. Include your process requirements if you would like help with selection.
View quote listThe IONIVAC ITR 90 combines Bayard–Alpert hot-cathode ionisation and Pirani measurement in one active transmitter. It supports monitoring from atmosphere into ultrahigh vacuum, with automatic switching between measuring systems and analogue/RS232 readout. Choose the flange, local-display option and control arrangement for the installation.
| Measurement principle | Bayard–Alpert hot cathode combined with Pirani |
|---|---|
| Display range | 5 × 10⁻¹⁰–1000 mbar, air / nitrogen / oxygen / carbon monoxide |
| Specified accuracy band | ±15% of reading from 1 × 10⁻⁸ to 1 × 10⁻² mbar after 5 minutes stabilisation |
| Repeatability | 5% of reading in specified accuracy band after 5 minutes stabilisation |
| Vacuum connection | DN25 ISO-KF or DN40 CF-R |
| Output / interface | Logarithmic analogue signal and RS232C; Profibus ITR 90 P variant separately specified |
| Supply voltage | 20–28 V DC; 24 V DC nominal |
| Maximum power consumption | 16 W |
| Electrical connection | 15-pin D-sub, standard ITR 90 |
| Operating temperature | 0 to +50 °C |
| Protection rating | IP30 |
The broad display range is not an accuracy guarantee at every pressure. The instruction sheet specifies 15% accuracy in the 1 × 10⁻⁸ to 1 × 10⁻² mbar band after stabilisation. Both measuring principles are gas-dependent; discuss other gases and changing mixtures rather than applying nitrogen/air calibration indiscriminately.
The Pirani reading controls hot-cathode operation: the sheet gives emission switch-on at 2.4 × 10⁻² mbar and switch-off at 3.2 × 10⁻² mbar. Correct interlocking helps protect the filament during pump-down and venting. Follow the manual for contamination protection and degassing conditions.
| DN25 ISO-KF, without / with display | 12090 / 12091 |
|---|---|
| DN40 CF-R, without / with display | 12092 / 12094 |
| ITR 90 P Profibus, DN25 ISO-KF / DN40 CF-R | 230030 / 230031; separate variant-specific interface instructions required |
The standard ITR 90 specifications above should not be assumed to describe every ITR 90 P electrical detail. Send the complete part number for a Profibus replacement or integration enquiry. Confirm current configuration availability with Girovac.
The ITR 90 can be integrated with a compatible readout such as GRAPHIX ONE using the correct cable and configuration. Supply and cable sizing must support emission-start and degassing demand, not only steady measurement. The controller, cables and power supply are separately specified items.
A replacement sensor and an optional baffle are documented service/accessory choices. Bakeout is conditional: the sheet permits 150 °C with the electronics removed, and the catalogue describes a bakeout extension for flange heating. Do not heat the complete assembled electronics to that temperature. Share process contamination and bakeout requirements before selection.
Specification references: instruction sheet KA09420_002_C0, October 2016; Leybold measurement catalogue pp46–49. Use the instructions matching the supplied part number and revision.
For a IONIVAC ITR 90 quotation, send the required pressure range and units, process gas and vapours, connection, ambient and bakeout conditions, output or communication protocol, cable length and quantity. Include the existing gauge/controller part numbers, required switching functions, power supply and calibration test points. Girovac will confirm the configuration, included equipment, price and availability.
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| Manufacturer | LEYBOLD |
|---|---|
| Equipment type | Vacuum gauges & instrumentation / High & Ultra-high Vacuum Gauges |
| Measurement principle | Bayard–Alpert hot cathode combined with Pirani |
| Display range | 5 × 10⁻¹⁰–1000 mbar, air / nitrogen / oxygen / carbon monoxide |
| Vacuum connection | DN25 ISO-KF or DN40 CF-R |
| Output / interface | Logarithmic analogue signal and RS232C; Profibus ITR 90 P variant separately specified |
| Maximum power consumption | 16 W |
| Specified accuracy band | ±15% of reading from 1 × 10⁻⁸ to 1 × 10⁻² mbar after 5 minutes stabilisation |
| Repeatability | 5% of reading in specified accuracy band after 5 minutes stabilisation |
| Supply voltage | 20–28 V DC; 24 V DC nominal |
| Electrical connection | 15-pin D-sub, standard ITR 90 |
| Operating temperature | 0 to +50 °C |
| Protection rating | IP30 |
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.
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