![]() ![]() Provides continuous real-time volumetric flow rate readings, so pump adjustment and calibration is fast and easy.These primary calibrators are accurate to +/- 2 % of reading. Volumetric flow rate is displayed continuously so adjustments to pump flow can be made in real-time. These portable, battery-operated units are lightweight and easy to use. TSI offers the Model 4146 and Model 4046 Primary Calibrators. Flow calibrators are used to adjust and measure the flow rate of air sampling instruments. Personal sampling pumps must be calibrated before and after each use and routinely checked during use. ![]() Determining exposure to various physical, chemical, radiological and biological substances is based on the accuracy of the total volume of air sampled and the sample duration. The frequency of flow adjustment and/or calibration depends on the use, care and handling of the air sampling instruments and the regulations they are complying with. Why is the adjustment and primary calibration of air sampling instruments necessary? Instruments that sample air must be flow adjusted, calibrated and routinely checked to ensure the accuracy of flow rate. 5000 Series Flow Meter Instructional Videos.PortaCount® Fit Testing Videos & Resources.Noise Dosimeters and Sound Level Meters.Indoor Air Quality Meters / Instruments.Flow Meters, Flow Sensors, and Flow Analyzers. ![]()
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