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Membrane measurement principle (order code: PCD-S-Mxx)
In this measurement technique, the pressure is converted into a force, which stretches a diaphragm and is measured by a piezo-resistive MEMS membrane sensor.
Sensor features:
oA zero point compensation is necessary after the installation and initial operation.
oTemperature compensation integrated.
oAmbient pressure compensation not necessary for this measurement principle.
Important: When using the PCD's to measure differential pressure and the reference 0 point is daisy chained via multiple PCD's, then please only use the Variant 2 - Membrane sensors and not the Variant 1 - Thermal mass flow flow sensors. The flow sensor leaks per design and as of such is not designed for this application. |
The PCD can be connected also directly to a PC using an AC3001 / AC3001-XD cable.
Further accessories can be found in the Accessories.
More details |
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PCD-S-Fxx |
Sensor |
Thermal mass flow |
Leak rate |
<180 µl/min |
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Accuracy1 |
±1 % full scale |
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Long term stability |
0.1 % full scale /year |
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Zero point compensation2 |
Automatic (1 x per measurement interval) |
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Temperature compensation |
Yes |
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Ambient pressure compensation |
Automatic |
|
Pressure resistance |
5 bar (Burst pressure) |
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PCD-S-Mxx |
Sensor |
Membrane |
Leak rate |
0 µl/min |
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Accuracy3 |
±1 % full scale |
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Long term stability4 |
±2 %FSS/year for ±25 Pa probe ±1 %FSS/year for ±50 Pa probe ±0.5 %FSS/year for ±100 Pa probe ±0.25 %FSS/year for ±250 Pa and ±500 Pa probes |
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Zero point compensation5 |
Manual |
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Temperature compensation |
Yes |
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Ambient pressure compensation |
Not necessary |
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Pressure resistance |
0.7 bar (Burst pressure) |
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All |
Range of application (pressure) |
±25/50/100/250/500 Pa |
Range of application (temperature) |
-20…80 °C |
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Range of application (humidity) |
0…95 %rh (non-condensing) |
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Diameter |
32 mm |
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Length |
87 mm |
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Housing material |
Polycarbonate, anthracite |
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Weight |
60 g |
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1 Incl. reproducibility, hysteresis error, non-linearity and position sensitivity; at 23 °C ±3 K ambient temperature
2 For detailed considerations, please see the function overview.
3 Incl. reproducibility, hysteresis error, non-linearity and position sensitivity; at 23 °C ±3 K ambient temperature and directly after a zero point compensation
4 Highly reducible by a zero point compensation
5 For detailed considerations, please see the function overview.