1. Challenger NIST Traceable Air flow Calibrator

2. Features Dry air flow calibrator No moving parts NIST Traceable Actual & Standard Conditions 1 LPM to 30 LPM High Accuracy

3. Theory The heart of the Challenger is a venturi. The pressure drop across the venturi produces a signal that is proportional to flow rate.

4. The Venturi Pressure taps are located in the venturi throat and upstream of the venturi.

5. Deluxe Kit with Two Venturis 1 – 6 LPM Venturi 6-30 LPM Venturi

6. Operation Press power switch on Allow time for internal calibration Flow rate (QA & QS) will display zeros or “Under” Attach to flow source Air flow reading is real time

7. Display Display BP = Barometric Pressure in mm mercury and millibars Ta = Actual Temperature in °C Qa = Actual flow rate in LPM Qs = Standard flow rate at 25°C and 760 mm mercury Batt = Battery life remaining

8. Advantages Dry Calibrator: No soap solution No Moving Parts Fast: Works in minutes Accurate: +/- 0.75 % Portable and light weight NIST Traceable with certificate

9. Thank You