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What is the frequency response of the TPT pressure transducer?

The TPT pressure transducer, an option for those needing a rapid response, is an example of a passive, un-amplified sensor. It incorporates a ceramic piezo-resistive sensing element and delivers a millivolt-level output through a Wheatstone bridge configuration. The transducer operates with a 3-30V DC power supply and provides an output typically around 2.5mV/V, utilizing a four-wire connection system (two wires for power and two for signal output).

The frequency response of the TPT pressure transducer varies across different pressure ranges, influenced by the thickness of its ceramic diaphragm. The following table illustrates how response times and corresponding frequencies change with different pressure levels:

Pressure (bar) Response Time (μs) Frequency (kHz)
1 35.0 22.1
2 23.0 34.7
5 14.2 47.4
10 9.5 65.4
20 6.0 79.4
50 2.6 118.3
100 1.6 134.4
200 0.9 158.7
400 0.7 192.1

These measurements show that as pressure increases, the response time decreases and the frequency of the output signal increases, demonstrating the transducer’s capability to handle varying pressure conditions with significant responsiveness.