Standard Staninless Steel Calibration Leak for Helium Leak Detector Calibration

Introduction of Calibration Leak

A helium permeation vacuum calibration leak source serves as a reference calibration source providing a known, constant, and minute helium flow rate. It is primarily used for calibrating the sensitivity of helium mass spectrometer leak detectors and performing quantitative measurements. Its core component—the helium permeation element—is typically constructed from quartz glass or specialty glass, while the overall housing is made of stainless steel. The device is usually compact in size and rod-shaped.

Functions of Calibration Leak

A certified heliumcalibration leak serves as the "ruler" for precise quantitative detection in helium mass spectrometers, with its primary functions including:
Calibrating Leak Detector Sensitivity (Core Function)
The calibration leak provides a known and precise leakage rate value.
When connected to a properly functioning leak detector, the instrument displays a detection signal value (such as peak height or current value).
By comparing the "reference value" with the "measured value", the accuracy of the leak detector's sensitivity can be verified, or the instrument's readings can be calibrated to ensure the authenticity of measurement results.
Determining the Minimum Detectable Leak Rate
By using a series of calibration leaks with extremely low leakage rates (close to the instrument's background level), the minimum leakage rate that the detector can reliably identify in practical applications can be tested and determined. This is a key metric for evaluating instrument performance.
Enabling Quantitative Leak Rate Measurement
When an unknown leak is detected, the leak detector can only provide a relative signal magnitude. By comparing this signal with that of the reference leak, proportional calculations can be performed to estimate the actual leakage rate of the unknown leak. This is crucial for quality control and process improvement.
Verifying Overall Leak Detector Performance
Regular inspections using reference leaks confirm whether the entire leak detection system (including the instrument, vacuum pumps, pipelines, etc.) is operating in an optimal state.