Product

AVL iCAL GDU SL™

Portable Gas Divider for linearity verification of gas analyzers

The AVL iCAL GDU SL (Gas Divider) is a precision tool to perform accurate calibrations (linearizations) for gas analyzers.
It is available with a certified ISO 17025 calibration.
Get in touch
AVL iCAL GDU gas divider

The accuracy of gas analyzers is highly dependent on the quality and precision of the calibration devices used. In order to guarantee high quality results, minimize operating errors and reduce operating times, we have created the AVL iCAL emission calibration devices. AVL’s ISO 17025 accredited calibration laboratory and numerous installations at regulatory bodies demonstrate the highest levels of accuracy required to determine compliance with the complex regulatory requirements.

The AVL iCAL GDU SL (Gas Divider) is used to verify the linearity of gas analyzers. The optionally integrated converter tester determines the efficiency of NOX converters used in chemiluminescence detector (CLD) analyzers.

Benefits
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.

Specifications

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.
Download Solution Sheet
Technical Details  

Power Supply

 100 – 240 V AC ±10 %, 50/60 Hz (external version)
24 V DC ±10 % (internal version)
Power Consumption Max. 75 W
Dimensions (W x D x H) 476 × 176 × 285 mm
(incl. feet and handle)
Weight Approx. 9 kg
Approx. 11 kg (with converter tester)
Ambient Temperature 5 … 45 °C
Flow Rate 3.5 ± 0.5 l/min (N2 bei 1,013 hPa 20 °C)
Accuracy < ±0.5 % of the selected dilution step
Operation Gases

Dilution gas: pure, dry and no highly corrosive
gases or gas mixtures
Inlet Pressure 3,600 – 4,800 hPa abs. (others on request)
Outlet Pressure Max. 1,400 hPa abs.

 
AVL iCAL GDU SL wall mounted

Accreditation

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.

Downloads

Other products that might interest you
AVL PA-FID C50
AVL PA-FID C50™

The AVL PA-FID C50 is a portable FID analyzer for continuous total organic carbon measurement in the process industry and in laboratories.
AVL PA-CLD C50
AVL CLD C50™

The AVL CLD C50™ is a light-weight Chemiluminescence Detector for stand-alone use in indoor areas or as a stack analyzer in emission measurement systems.
PA-FTIR C50
AVL PA-FTIR C50™

The AVL PA-FTIR C50™ is a compact and lightweight FTIR analyer for emission monitoring in the process industry.
AVL FTIR C50
AVL FTIR C50™

The AVL FTIR C50™ is a multi component measuring system for stationary emission monitoring.
AVL PA-FTIR M50
AVL PA-FTIR M50™

The AVL PA-FTIR M50™ is a compact and lightweight FTIR analyzer for marine applications.