Up to 1023 Cut Points
By using the combinations of up to 10 sonic nozzles, 1023 cut points (division steps) can be realized. This allows to dilute a gas of e.g. 10,000 ppm down to 9.77 ppm and reduces the number of gas bottles needed.
Best Accuracy, Stability and Reproducibility
By using sonic nozzles in stainless steel and high precision pressure sensors with automatic drift compensation, a dilution accuracy of better than 0.5% of the cut point can be reached with unprecedented long-term stability and reproducibility.
Fast Purge / Stabilization Times
Optimized flow design, realized by using virtual flow simulation and 3D printing of complex stainless steel structures, provides much faster purge and stabilization times compared to conventional mixing devices. This also saves calibration gases and reduces operational cost.
Best Results also with Problematic Gases
Optimized especially for low concentrations of gases that tend to stick to surfaces, like e.g. NH3. It provides faster signal stabilization and higher accuracy also with such gases, thanks to the new flow design combined with use of best suited materials and surfaces.
Certified Accuracy - Robust Operation
NIST traceable and ISO 17025 certified calibrations, each nozzle calibrated with a flow accuracy of better than 0.2%. Since sonic flow nozzles as secondary flow standards, they remain their accuracy during their life time.
The AVL iCAL GDU SL is available with 15, 63, 255 or 1023 cut points. The device is available with or without integrated converter tester and as an integrated device for installation in a measuring cabinet or as an external device.
The underlying physical principle of the device is based on the combination of calibrated critical (sonic) nozzles allowing accurately diluted calibration gases. Calibration gas and dilution gas pressures are controlled with high-precision pressure regulators incorporating excellent long-term stability. A serial interface (RS232) as well as a LAN interface (TCP/IP), based on the AK standard is included for remote control. Additionally, the device can be operated through a web-interface via a tablet or notebook.
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EPA 40 CFR Part 1065
Provides an additional verification of the gas divider in order to comply with EPA 40 CFR Part 1065.307.
The calibrated gas divider is verified using an oxygen analyzer that has been linearized with an independent dedicated reference gas divider.
ISO 17025
Provides a check of the flow rate of the individual gas divider nozzles.
Laboratory accredited by DKD according to ISO 17025.
Solution Sheet AVL iCAL GDU SL
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