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Application notes
Selection of the right pressure sensor
To select the right pressure sensor for a specific application besides the pressure range first of all the type of pressure measurement has to be considered. Pressure sensors measure a certain pressure in comparison to a reference pressure and can be divided into absolute, gage and differential devices. This report will explain these terms on the basis of Sensortechnics’ piezoresistive pressure sensors.
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To select the right pressure sensor for a specific application besides the pressure range first of all the type of pressure measurement has to be considered. Pressure sensors measure a certain pressure in comparison to a reference pressure and can be divided into absolute, gage and differential devices. This report will explain these terms on the basis of Sensortechnics’ piezoresistive pressure sensors.
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Application advantages of LBA differential pressure sensors
due to their very high pneumatic impedance
Sensortechnics’ LBA differential pressure sensors measure ultra low air or gas pressures from 25 Pa (0.1 inH2O) full scale. The sensors are based on a new and innovative MEMS technology which integrates a micro flow channel within the silicon sensor chip.
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due to their very high pneumatic impedance
Sensortechnics’ LBA differential pressure sensors measure ultra low air or gas pressures from 25 Pa (0.1 inH2O) full scale. The sensors are based on a new and innovative MEMS technology which integrates a micro flow channel within the silicon sensor chip.
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LBA differential pressure sensors - high immunity to dust contamination
Sensortechnics’ flow-based LBA differential pressure sensors are experimentally compared in applications with dust-bearing air to other sensors which use the same sensing principle. Only the LBA sensors kept their calibrated sensitivity over the entire duration of the tests.
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Sensortechnics’ flow-based LBA differential pressure sensors are experimentally compared in applications with dust-bearing air to other sensors which use the same sensing principle. Only the LBA sensors kept their calibrated sensitivity over the entire duration of the tests.
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LBA differential pressure sensors - high immunity to humidity
Sensortechnics’ flow-based LBA differential pressure sensors are experimentally compared in applications with high humidity to other sensors which use the same sensing principle. Only the LBA sensors kept their calibrated sensitivity over the entire duration of the tests.
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Sensortechnics’ flow-based LBA differential pressure sensors are experimentally compared in applications with high humidity to other sensors which use the same sensing principle. Only the LBA sensors kept their calibrated sensitivity over the entire duration of the tests.
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I²C bus communication with Sensortechnics' digital HDI-, HCLA-, HCA- and SSI
pressure sensors
pressure sensors
Sensortechnics’ digital pressure sensors are calibrated and temperature compensated with an on-board ASIC, which provides a corrected digital pressure value with up to 15 bit resolution. Additionally an analog voltage output is available at the same time. The response time of the sensor depends on the adjusted
internal resolution. For 12 bit it is typ. 0.5 ms. Sensortechnics’ digital sensors can be configured to comply with I²C or SPI bus protocol.
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SPI bus communication with Sensortechnics’ digital HCE pressure sensors
Sensortechnics’ digital pressure sensors are calibrated and temperature compensated with an on-board ASIC, which provides a corrected digital pressure value with up to 15 bit resolution. Sensortechnics’ digital sensors can be configured to comply with SPI or I²C bus protocol.
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Sensortechnics’ digital pressure sensors are calibrated and temperature compensated with an on-board ASIC, which provides a corrected digital pressure value with up to 15 bit resolution. Sensortechnics’ digital sensors can be configured to comply with SPI or I²C bus protocol.
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Constant current excitation for Sensortechnics' SSO compensated
stainless steel pressure sensors
Sensortechnics' SSO series offers rugged OEM pressure sensors in a fully welded, media isolated stainless steel construction. These devices are temperature compensated from 0...50 °C when using
constant current excitation. This application note describes the design of an appropriate constant current source.
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stainless steel pressure sensors
Sensortechnics' SSO series offers rugged OEM pressure sensors in a fully welded, media isolated stainless steel construction. These devices are temperature compensated from 0...50 °C when using
constant current excitation. This application note describes the design of an appropriate constant current source.
Download
Signal conditioning circuitry for the RCO and HDO series pressure sensors
The signal conditioning circuitry described below has been especially designed for Sensortechnics' RCO series pressure sensors. However it can be applied to all sensors with a Common Mode voltage which is half of the supply voltage (VCM≈½ VS), e.g. Sensortechnics' HDO series.
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The signal conditioning circuitry described below has been especially designed for Sensortechnics' RCO series pressure sensors. However it can be applied to all sensors with a Common Mode voltage which is half of the supply voltage (VCM≈½ VS), e.g. Sensortechnics' HDO series.
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Signal conditioning circuitry for the RXU and XSU series sensors
This application note describes a low cost approach for temperature compensating Sensortechnics' RXU series sensors which is easy to implement in production. The discussed solution can also be used for other uncompensated pressure sensors such as Sensortechnics' XSU series.
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This application note describes a low cost approach for temperature compensating Sensortechnics' RXU series sensors which is easy to implement in production. The discussed solution can also be used for other uncompensated pressure sensors such as Sensortechnics' XSU series.
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Operation principle and construction of zirconium dioxide oxygen sensors
of the XYA series
of the XYA series
Sensortechnics' oxygen sensors of the XYA series consist of two zirconium dioxide (ZrO2) discs coated
with thin porous layers of platinum which serve as electrodes. The two discs are attached to a platinum ring, forming a hermetically sealed chamber.
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with thin porous layers of platinum which serve as electrodes. The two discs are attached to a platinum ring, forming a hermetically sealed chamber.
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Designing interface electronics
for zirconium dioxide oxygen sensors
of the XYA series
of the XYA series
If not using one of Sensortechnics' ZBXYA interface
boards for sensor control and conditioning of the XYA oxygen sensors, this
appication note describes the basic building blocks required
to create an interface circuit.
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Measuring transition points in liquids with different densities with
Sensortechnics' capacitive CLC and CLW level sensors
Due to their sensitivity and teaching possibilities Sensortechnics' capacitive CLC and CLW sensors can be used to determine transition points between any two liquids with different densities and a sufficient difference in relative permittivity. A typical application is the detection of water accumulating at the bottom of an oil tank.
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Sensortechnics' capacitive CLC and CLW level sensors
Due to their sensitivity and teaching possibilities Sensortechnics' capacitive CLC and CLW sensors can be used to determine transition points between any two liquids with different densities and a sufficient difference in relative permittivity. A typical application is the detection of water accumulating at the bottom of an oil tank.
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Mass flow versus volumetric flow
Mass flow is a dynamic mass per time unit measured in grams per minute (g/min). By referencing a volumetric flow (cm3/min) to its known temperature and pressure, an exact mass flow can be calculated. It is common in the industry to specify mass flow in terms of volumetric flow at standard (reference) conditions.
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Mass flow is a dynamic mass per time unit measured in grams per minute (g/min). By referencing a volumetric flow (cm3/min) to its known temperature and pressure, an exact mass flow can be calculated. It is common in the industry to specify mass flow in terms of volumetric flow at standard (reference) conditions.
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