Keller PRD-33X series differential pressure transmitter

The Keller PRD-33X series differential pressure transmitter includes a double sensor for measuring the differential and line pressure independently, highly accurate measurements and a high overload resistance.

Due to calibration over its entire pressure and temperature range, the PRD-33X achieves a high accuracy level up to ±0.05% FS. A floating assembly of the sensor unit provides protection from external forces during installation.

Pressure tanks impose particular requirements on pressure transmitters. The closed systems require two measurements to deter­mine the level: one for the tank pressure and one for the liquid pressure. The PRD-33X having two independent sensors can achieve this in one measurement process. All transmitter parts contacting with the medium are made from high-quality materials such as stainless steel AISI 316L, silicone, gold and silicon. The PRD-33X is therefore suitable for use with (liquid) oxygen, argon, nitrogen, helium and carbon dioxide.

When it comes to the cryogenic liquefied gases, tanks that are smaller than 3 m can have a differential pressure range of only 200 mbar - with a line pressure of up to 32 bar. With line pressure compensation of 0-40 bar, the PRD-33 X can tackle this challenging combination. When the tank is being filled or the valve is being used, the entire tank pressure can hit one side of the differential pressure transmitter. The PRD-33 X also copes with the resulting 32 bar uneven overloading with its overload resistance of ±35 bar.