Ralston Volume Controllers

Applications for the Volume Controller

Differential Pressure Transmitter Calibration

Use the Volume Controller to hit pressure test points quickly and accurately. It can be used without nitrogen to control pressure for calibrating the differential pressure side of a pressure transmitter up to 400 inH2O / 1000 mbar. With compressed nitrogen applied it can be used to control pressure for calibrating the static side of a pressure transmitter to 3000 psi / 200 bar.

Analog Pressure Gauge Calibration

When used in conjunction a digital test gauge and a 2 or 4 port benchtop manifold it can be used to calibrate 2 or 4 of the same range pressure gauges at the same time. This works much quicker and more efficiently than a deadweight tester for calibrating analog pressure gauges. This makes an excellent choice for a laboratory to calibrate pressure gauges in a wide range of pressures.

Vacuum Pressure Gauge or
Transmitter Calibration

Connect the Volume Controller in line with a mechanical vacuum pump. Pull a vacuum on the inlet side of the Volume controller and control vacuum to precise test points better than with virtually any other device.

Float Pneumatic Piston Gauges

In high precision pressure calibration the Volume Controlle can provide a precise pressure to float a piston gauge so that the piston gauge can deliver accurate pressure.