A Few Words About McDaniel Gauges. We have the largest and finest selection available. The many first of its kind were manufactured with only one thought in mind: purposeful construction. Economical and dependable operation with cost as only a secondary consideration. Engineered to withstand 300% full scale pressure without rupture of the bourdon tube and 130% full scale pressure without loss of accuracy makes us the exception in the marketplace today. After all - it costs more to replace a defe