0,3 ppb ... 3 ppm SF6 - HIGHsens
6,0 ppb ... 30 ppm SF6 - Standard
SF6 LASERCHECK P3:FH is designed for tracer gas containment testing using SF6.
As a light source, the SF6 LASERCHECK P3:FH features a laser specially developed for this application, which illuminates the internal detection chamber to determine the SF6 concentration.
Its novel principle of measurement (patent pending) not only
enables SF LASERCHECK P3:FH to determine very low gas
concentrations, but also makes it suitable for use in any
environment.
Since the temperature of the test specimens has no influence on the measuring process, the SF6 LASERCHECK P3:FH test system reliably delivers consistent results even under harsh environmental conditions such as encountered in industrial production. Due to the system’s fully automatic operation, no operator-dependent influences occur.
SF6 LASERCHECK P3:FH uses an advanced principle of photoacoustic gas detection (patent pending), reaching a detection
threshold as low as 6 ppb (parts per billion) at extremely low
cross sensitivity and excellent long-term stability.
A gas sample is transferred into the instrument’s measuring
chamber, where it is exposed to the pulsed beam of a
wavelength-optimized CO2 laser. The laser light is partially
absorbed by the SF6 molecules, turning part of its energy into
heat. Due to the pulsation of the beam, a cyclic expansion of the
gas can be observed in the presence of SF6 molecules, which is
detected as sound waves by highly sensitive microphones. The
intensity of these sound waves is in a fixed ratio with the SF6
concentration contained in the sample gas.
Unlike conventional absorption spectroscopy, the advanced
principle used in SF6 LASERCHECK P3:FH makes it possible to
determine, and compensate for, a beginning contamination of
the internal measuring chamber. This ability accounts for its
excellent long-term stability of measurement.
SF6 LASERCHECK P3:FH is composed of a base unit, comprising
the measuring cell, laser, vacuum pump and a controller.
A WIN PC (Win 7,8,10) running a custom control software serves
as the man-machine interface. This software controls the
measuring process, visualizes its results, and processes user
inputs such as parameter settings. It also stores resulting data for
evaluation.
