Role of Vacuum in Analytical Instruments
In analytical instruments, vacuum is not merely an auxiliary condition—it is a core operating environment that directly defines measurement principles, detection limits, and data reliability.
Vacuum enables:
- Free transmission of particle beams (electrons, ions)
- Protection of sensitive samples and signals
- Effective manipulation and detection of ions
As a result, stable vacuum monitoring is essential for reliable instrument performance.
Position of Pirani Gauges in Instruments
In most analytical instruments, Pirani gauges are used to monitor the roughing and fore-vacuum stages, ensuring proper operating conditions before high-vacuum stages are engaged.
Typical Operating Conditions
Analytical instruments typically operate within:
- Pressure range: Atmospheric pressure down to ~10⁻¹ Pa
- Operating temperature: 15–35 °C
- Continuous operation with high repeatability requirements
Pirani gauges are well-suited to these conditions, offering reliable long-term monitoring.
Signal and Control Integration
Depending on system architecture, Pirani gauges can provide:
- Analog voltage output for ADC-based control systems
- RS232 digital communication for direct system integration
Only one output mode is used per device, simplifying system design.
Mechanical and Electrical Integration
For OEM integration, Pirani gauges offer:
- Vacuum interface: KF25 or KF16
- Electrical connector: RJ45
- Installation: No orientation constraints
- Compact size and low weight, suitable for embedded designs
OEM Considerations
For instrument manufacturers, Pirani gauges provide:
- Consistent measurement performance across batches
- Stable repeatability supporting instrument calibration
- Long product lifecycle suitable for series production
What’s More?
Check our Pirani Vacuum Gauge (Transmitter) – VG-SP205
Check another application: Pirani Vacuum Gauge for Laboratory Vacuum Monitoring
Or
For higher vacuum ranges, consider Cold Cathode Vacuum Gauges VG-SM225.