McGill Leak Detective® Test Kits:
You can order our standard or nonstandard orifice tubes individually, in lieu of an entire test kit. Nonstandard orifice tubes are specially designed and calibrated according to the required volume flow and test pressure. They can be calibrated for use in both positive and negative pressure testing situations. When ordering a nonstandard tube, the required volume flow, test pressure, and calibration requirements should be specified.
Standard 4-, 5-, 6-, and 8-inch orifice tubes are calibrated against master tubes, which have been certified to an accuracy of 0.5 percent by an independent laboratory on equipment traceable to the National Institute for Standards and Technology (NIST), formerly the National Bureau of Standards.
The expected accuracy of all our orifice tubes at the time of shipment is 2 percent of the indicated flow rate.
Periodic recalibration of orifice tubes is recommended. Our laboratory has determined that tubes over three years old can be inaccurate by up to 6 percent.
Note: Each orifice tube manufactured by McGill is individually calibrated and marked with an identification number. We keep calibration records from the past 10 years on file in case a chart is lost.
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enterprise of United McGill Corporation—Family owned and operated since 1951
were current at the time of publication. All product designs,