Calibration device for leak detecting instruments

A leak detector calibration device for generating a leak standard, said leak detector calibration device comprising:

• an inlet port for coupling a positive pressure source allowing the calibration device to generate a leak standard therefrom, the positive pressure source being connectable to a leak detector for measurement of the generated leak;
• means for controlling the flow rate of gas coupled to said inlet port providing gas flow therethrough to generate the leak standard for measurement by the leak detector;
• said controlling means comprising means for adjusting the control flow rate of gas;
• means for transducing the flow rate of gas through said inlet port producing a signal indicative of the flow rate, said transducing means being coupled to said controlling means;
• means for amplifying connected to said transducing means for amplifying the signal indicating flow rate;
• means for displaying the flow rate, said display means being responsive to the amplified signal;
• and
• housing means for housing said inlet port, said controlling means, said transducing means, said amplifying means and said display means in a single hand-held housing.