Accuracy of pressure gauges can be quickly checked with this portable test kit. Screwed into the threaded port, gauge is put under pressure by turning the handle on the water-filled tester. The tested gauge requires recalibration when the reading differs from the master gauge. Stainless steel instrument comes packed in a padded carrying case, with needle puller, resetting tool and a screwdriver for recalibrating faulty gauges. Occasional recalibration of master gauge on a dead weight tester is necessary.
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