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Precision Calibration of Your Gas Flow Meter With Cal=Trak
If you're looking for accurate calibration for your in line gas flow meter or lab instruments, the portable and low-maintenance Cal=Trak SL-500, SL-800 and XL models will give you the precision results you need. Whether measuring natural gas or an inert gas such as argon, you just can't go wrong with a gas flow meter from Sierra.
Sierra, one of world's most preferred gas flow meter manufacturers, presents the much anticipated successors to its well-known but discontinued Cal=Bench line of primary standard piston provers from the 1990's. The high-quality relays in the Cal=Trak SL-500 offers an excellent accuracy of ±0.35% of reading while the Cal=Trak SL-800 offers the best accuracy of any commercially available standard: ±0.15% of reading! And if you manage high gas flow, the XL model also provides powerful ±0.25% accuracy up to 500 slpm.



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Cal=Trak™ XL High Flow Calibrators
Ideal for calibration of high flow gas instruments including mass flow meters and controllers. Excellent primary standard accuracy of: +/-0.25% of reading! Flow ranges from 5 to 500 slpm.
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Cal=Trak Is The Professional's Choice For Gas Flow Meter Calibration
Any flow instrument operator can use Cal=Trak meters in the manufacture, inspection, validation and recalibration of mass flow controllers, mass flow meters and numerous other varieties of gas flow measurement and control instrumentation.
The Cal=Trak 500 and 800 models operate in the 5 sccm up to 50 slpm flow range (up to 500 slpm with the XL model). The broad turndown ratio allows three interchangeable flow cells to cover the entire range, minimizing initial investment and maintenance costs. Alternatively, the modular nature of the Cal=Trak allows the user to begin with one flow cell and then add other cells as resources allow—making it easy for you to get started with minimal investment.
Sierra's Cal=Trak line provides primary NIST traceability, is manufactured under strict ISO 17025 certification, and is CE approved. The dimensionally-based primary accuracy of Cal=Trak is superior to pressure-based secondary methods and is backed by a rigorous uncertainty analysis.
Both Cal=Trak models offer data logging, digital communications, interval operation and many other productivity-enhancing features. Fast enough to use as a gas flow meter, Cal=Trak is automatic and requires minimal training to get started. It is well-suited for applications with roots in the metrology, gas chromatography, electronic semiconductor, analytical, medical and pharmaceutical fields, among many others. Click on the buttons below to discover which Cal-Trak model is the perfect fit for your needs.