3D Instruments 24 series Accu-Drive pressure gauges incorporate the "Direct Drive Difference" Inconel helical bourdon tube system. The "direct drive" concept couples the bourdon tube directly to the shaft-pointer, thereby streamlining the design and reducing the number of moving parts from approximately twelve down to one. Thirty years of industrial application have proven that this design is vastly superior to the C-bourdon tube and movement system incorporated in other pressure gauges especially for vibration and pulsation. The Series 24 "direct drive" gauges come with a dampening gel in the bearing. This "shaft dampening" approach isolates the pointer from vibration and pulsation, thereby eliminating the requirement for liquid filling of the gauge case. In most instances, a standard 3D Accu-Drive pressure gauge can directly replace an "old fashioned" liquid filled gauge without creating the maintenance headaches cited above. When compared to a liquid filled gauge, the Accu-Drive gauges have been shown to last as much as ten times longer in applications with extreme pulsation and vibration. The net effect of these benefits is a dramatic lowering of your cost of ownership. Additionally, because of a lack of gears and wear points, the Accu-Drive series of pressure gauges maintain their rated accuracy over the entire life of the gauge without the need for costly periodic recalibration. All Series 24 Accu-Drive pressure gauges utilize the finest materials of construction. Gauge case materials can be either Valox or powder coated aluminum and the bourdon tube is constructed on Inconel, a highly elastic material with excellent corrosion resistance. The wetted parts are of 316SS. The balance of the gauge hardware is designed to minimize corrosion associated with challenging field environments. -65 to +190 degrees F temperature range.
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