Differential piston gauge

GE Sensing has introduced its Ruska Model 2482 differential piston gauge in response to market demand for an accurate and easy-to-use differential pressure standard for use at high static line pressures. Featuring a triple-piston assembly, this primary standard has been designed to calibrate virtually any differential pressure sensing device from 0 to 850 in H2O (2100 mbar) at line pressures up to 2900 psi (200 bar).

Few devices are calibrated at elevated line pressure due to the associated costs and complexity of traditional twin post calibration standards. In traditional systems, minute load adjustments are required to establish zero differential at each line pressure. This elaborate zeroing process is eliminated in the Model 2482 through the use of a precision load cell, actually a digital force balance. The load cell supports the weight of the differential piston and serves as a null indicator to ensure the line pressure balance point. It also provides feedback to an active control system so that the differential pressure produced is maintained when changing the mass load.

The Model 2482 can be used to calibrate virtually any hydraulic or pneumatic pressure device, including other industrial or portable piston gauges, transducers, transmitters, gauges or pressure switches. It offers an accuracy of 40 ppm of reading +0.0013 psi and its Windows-based menu-driven software both controls the piston gauge and provides the full range of necessary corrections and calculations.