The VA 40ZG6 flow/consump-tion rate sensors for air and gasses are approved by the Federal Technical-Physical Institute for use in explosion hazard areas of zone 0 – EEx ia IIC T6. Vortex sensors made from stainless steel, tantalum and Hastelloy C4 and C22 for zone 0 (for zone 1 also available out of titanium) do not have any moving mechanical parts. Therefore they can be used for very dusty, dirty or damp – but non-condensing – media. The measurement recording is almost free of delay, flow speeds can be measured from 0.5 m/s up to 80 m/s. The temperature resistance ranges between -25 to 80 °C, the pressure resistance is 6 bar overpressure.
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