Application Background
In laboratory environments, vacuum is widely used as a process-enabling tool rather than a precision-controlled physical condition.
Typical laboratory applications—such as vacuum drying, freeze drying, rotary evaporation, vacuum ovens, and roughing stages of high-vacuum systems—operate mainly from atmospheric pressure down to approximately 10⁻¹ Pa. In these scenarios, the primary objective is to remove gas, prevent oxidation, or accelerate physical processes, rather than to establish ultra-high vacuum conditions.
Pursuing ultra-high vacuum (UHV) or extremely high measurement accuracy in such cases often results in performance overkill and unnecessary cost.
Typical Vacuum Range in Laboratories
For most routine laboratory operations, the commonly used pressure range spans from atmospheric pressure (10⁵ Pa) down to approximately 10⁻¹ Pa.
This range fully overlaps with the effective measurement range of Pirani vacuum gauges, making them a practical and widely adopted solution in laboratory vacuum systems.
Measurement Purpose: Monitoring vs. Metrology
In laboratory applications, Pirani vacuum gauges are primarily used for process monitoring rather than absolute metrology.
While absolute accuracy is limited—especially when gas composition varies—Pirani gauges provide excellent repeatability and long-term stability, which are critical for ensuring that vacuum processes are established consistently from run to run.
For most laboratory workflows, monitoring pressure trends and process repeatability is far more valuable than achieving absolute pressure accuracy.
Stability and Repeatability Requirements
Laboratory experiments often require vacuum systems to operate continuously over long periods without interruption.
Pirani gauges are well-suited for this purpose, offering:
- Long-term continuous operation without the need for shutdown
- Stable readings throughout experimental cycles
- Reliable repeatability, supporting experimental consistency
Integration Considerations
From an integration perspective, Pirani gauges are straightforward to deploy in laboratory systems:
- Vacuum connection: KF25 or KF16
- Electrical interface: RJ45
- Installation orientation: No directional constraints
- Signal output: RS232 or analog voltage (selectable, not simultaneous)
Why Pirani Is a Practical Laboratory Choice
For routine laboratory vacuum applications, Pirani gauges offer a balanced combination of:
- Cost efficiency
- Ease of installation and operation
- Minimal maintenance requirements
- No need for regular calibration
What’s More?
Check our Pirani Vacuum Gauge (Transmitter) – VG-SP205
Check another application: Pirani Vacuum Gauge for Analytical Instruments
Or
For higher vacuum ranges, consider Cold Cathode Vacuum Gauges VG-SM225.