Pressure sensor (high resolution/high speed) wanted!!!

Christiaan, a Rosemount 3051C would have no trouble meeting the specs you've given, but if you were particularly worried about linearity with your high sampling rate, I would recommend a Rosemount 1151GP (yes, they still make them - and the 3051 is digital and the 1151 is analog) although the 1151 won't like 125degC.

You could expect to get around 25Pa resolution with the 3051 and less than that, but with decreased repeatability, from the 1151.

Look them up at

I hope this helps. Cameron:-)

Hi,

The problem with the sensors that you listed is the sample speed. I want to scan the pressure at e.g. 400 Hz!!!! The damping of the listed sensors is too high if I look in the Rosemount catalogs.

greetings Christiaan Moons

Years ago I did high speed pressure monitoring on hydraulic systems using strain gauge transducers, IIRC FW Bell was the manufacturer, but I could be wrong. They had time constants in the low millisecond range. There was no amplification, the wires came straight from the gauge rosette. With high quality instrumentation amps they were easily capable of resolution under

Correct me if I'm wrong, but I would have thought that an analog pressure transmitter would give you linearly-varying pressure readings no matter how fast you scanned it. True - I didn't look at the damping - and this will affect your response time, I suppose.

If you manage to find a "high-speed" Ex'd'-rated pressure tranmitter can you please let us know?!? IMHO, I don't think you will find any - ATEX approval is not cheap and the market is not big enough. ..but I like to be found wrong.

Cameron:-)

I think you are talking about a microphone followed by an A/D converter such as a sound card.

Walter.