When your critical process demands certified pressure gauge accuracy, The Macomb Instrument Division provides complete in-house pressure gauge certification. Our deadweight tester is certified traceable to NIST standards to insure your pressure instrument meets or exceeds the manufacturers catalog stated accuracy. Our standard test includes a 5-point check across the entire range of the gauge, completed calibration certificate, and a date-of-calibration sticker affixed to the gauge. We specialize in recertification for Watts TK9A Backflow Preventer Test Gauges. We typically turn around gauge recertification orders in one day.