Features

• Ultra-high sensitivity with a detection limit of 6 ppb (0.006 ppm) with SF6 as a tracer gas
• No radioactive source
• Pure Argon not required
• Measurement results independent of temperature and moisture
• Permanent self-diagnostics
• Fully automated measurement and data storage according to ASHRAE 110-2016 and DIN EN 14175
• Portable with rugged case
• No regular maintenance required

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.

System Characteristics
SF6 LASERCHECK P3:FH is composed of a base unit, comprising the measuring cell, laser, vacuum pump, and a controller.

A WIN PC (Win 7.8.20) 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.

Specifications
Detection Cell :  Photoacoustic
Measuring range :  6 ppb ... 30 ppm SF6
Resolution :  1,5 ppb
Continous graph :  1 s resolution
Laser class :  1; no protective measures required
Self diagnostics :  continuous
Temperature range :  15 °C ... 35 °C for operation,
                                   0 °C ... 45 °C for storage
Dimensions :  670 x 300 x 600 mm
Weight :  35 kg