Direct Drive Pressure Gauges for the Most Demanding Applications

Series 34 Direct Drive Pressure Gauge
Courtesy 3D Instruments

Pressure indication, at the location, real time. That is what a dial pressure gauge provides a process operator. Pressure gauges do not require any type of operating power, making them immune to power failures. The Bourdon tube mechanical operator is generally rugged and reliable. They are, however, subject to wear in the linkage that connects the Bourdon tube to the indicator needle over time. Extremes of vibration will also likely impact the longevity of the linkage, leading to premature failure.

3D Instruments, a manufacturer of pressure gauges and related products for industrial, commercial, and scientific applications, has developed a direct drive pressure gauge intended for use in the most rugged and demanding applications. The direct drive pressure gauges have only one working part, a helically-wound Bourdon tube made of Inconel® X-750, a flexible material that prevents the coil from losing its shape and ensures accuracy. The indicating needle is directly connected to the Bourdon tube, eliminating linkage parts. This innovation, while maintaining the benefits of some of the oldest pressure measurement technology, adds improvements in overpressure protection, burst protection, wear resistance, and life cycle cost.

A short video, included below, highlights and illustrates how the direct drive system works. Reach out to a process measurement product specialist for more detail, or solutions to any of your measurement and control challenges.