The SM4000 and SM1000 medium pressure MEMS sensors offer gage and differential pressure measurement from 2.5 to 30 PSI providing a calibrated and temperature compensated digital or digital and analog output signal.
The medium SMI pressure sensors offer various package options including the small footprint SOIC-10 housing for applications requiring miniaturized components.
The SM4000/SM1000 are medium pressure MEMS sensors from 2.5 to 30 PSI available in gage, differential and asymmetric differential configuration.
This series provide a JEDEC standard SOIC-16 package with vertical or horizontal porting options or a JEDEC SOIC-10 package with a vertical port. With the dual porting, a reference measurement is possible to minimize errors due to changes in ambient pressure.
Combining the pressure sensor with a signal-conditioning ASIC in a single package simplifies the use of advanced silicon micro-machined pressure sensors. The pressure sensor can be mounted directly on a standard printed circuit board and a high level, calibrated pressure signal can be acquired from the digital interface. This eliminates the need for additional circuitry, such as a compensation network or microcontroller containing a custom correction algorithm.
What is the proof pressure (maximum pressure to which the device can be taken and still perform within specifications (without loss of accuracy) after returning to the operating pressure range) for the SM4000 and SM1000 Series?
The proof pressure for sensors with a maximum operating pressure range up to 7.5 PSI is 25 PSI, respectively 45 PSI for devices with a max operating pressure range up to 30 PSI.
What is the burst pressure (pressure where part is permanently damaged) of the SM4000 and SM1000 Series?
The burst pressure for sensors with a maximum operating pressure range up to 7.5 PSI is 40 PSI, respectively 75 PSI for devices with a max operating pressure range up to 30 PSI.
What is the difference between differential and gage pressure?
dP=P1-P2 is the pressure difference between two points, 1 and 2. P1 and P2 are respective pressure at the two points. This could be across an air flow restrictor in a HVAC system, or across a filter in the HVAC system, or in a ventilator system to detect and control inhalation / exhalation air flow.
Gage pressure is the pressure differential with respect to the atmospheric pressure. Generally -not always, gage pressure is higher than atmospheric pressure, so gage pressure sensors are calibrated to have its output be at minimum at atmospheric pressure, and increase from there. Gage pressure sensors are used to measure e.g. pressure in a pressure in a manifold.
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