Each Magnum Pro calibration pump uses our unique patented design, utilizing a Schrader valve instead of a needle valve, dual O-rings on all pistons as well as other enhancements. These innovations have earned our calibration pumps the reputation of being indestructible.
Winchester Engineering has rapidly become the digital gauge of choice. A single Winchester Engineering Gauge will replace up to seven competing gauges. Less gauges means fewer gauges to calibrate and maintain each year. Model 1 uses patent pending technology to maintain .1% of reading accuracy from absolute vacuum to 3000psi. This will eliminate costly mistakes due to over-ranging.