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The BGI TetraCal® is the first and only volumetric continuous flow calibration /audit device which gives a direct indication of volumetric flow rate, standard flow rate, barometric pressure (both mm/Hg & mb), and ambient temperature in one instrument. It was developed for use with all types of air samplers in the 0.1 to 60 lpm range.
It is the only field audit / calibration device which meets the same temperature criteria as EPA and European designated samplers themselves. The temperature range is -30° to 55° C (EPA requires up to 40° C).
Std temperature can be at zero or twenty degrees C. (Please state at order)
The heart of the TetraCal® is a venturi which is superior to an orifice in that it offers no sharp edges which can be damaged and a 90% recovery of the measurement pressure drop, important when calibrating some forms of speciation samplers or other critical orifice controlled devices. Because flow through the instrument is uninterupted, our graphic software provides a continuous output display of all functions.
The TetraCal covers flows from 0.1 lpm to 30 lpm
The TetraCal Ultra covers flows from 0.1 lpm to 60 lpm (Ideal for European Std Samplers @ 2.3m3/hr)
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