20/10/2007 |
OXYGEN SENSOR - Principle and construction description.
Oeprating principle and construction of zirconium dioxide oxygen sensors of the XYA series.
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18/10/2007 |
I2C Communication with HCLA Pressure Sensors
Sensortechnics' digital HCLA series offers precision gage or differential pressure measurement in miniature package style. The I2C bus is a simple, serial 8-bit oriented computer bus for efficient I2C control.
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18/10/2007 |
SPI Communication with Digital Pressure Sensors
Sensortechnics' digital pressure sensor families offer precision absolute, gage or differential pressure measurement in various ranges. The Serial Peripheral Interface (SPI) is a simple bus system for synchronous serial communication between one master and one or more slaves.
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01/09/2007 |
SENSORE DI PRESSIONE BAROMETRICO- AN1
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01/09/2007 |
QUARTZ CRYSTAL THEORY
Importante nota informativa sulla teoria dei quarzi per applicazioni elettroniche.
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01/08/2007 |
TRANSDUCERS IN FLUID FLOW APPLICATIONS
This AN describe the three basic classes of transducer applications. All transducer usages will fit inot one of the following categoris: 1.Pressure Vessel 2.Open Flow 3.Closed Flow.
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01/08/2007 |
UNDERSTANDING ABSOLUTE PRESSURE SENSORS
This application note will discuss what absolute pressure is, how it is the best measured and how to calibrate absolute pressure sensors.
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01/08/2007 |
PIEZORESISTIVE TECHNOLOGY
The AN describe how the piezoresistance of a semiconductor can change in resistance by an applied strain of the diaphgram.
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01/08/2007 |
Understanding constant voltage and constant current excitation for pressure sensors
Low cost solid state pressure sensor elements have attracted a great deal of attention lately. Although for the bulk of applications it is more economical to use a device which is calibrated by the sensor manufacture, for some very high volume OEM applications a basic sensor element can be used. It is when using these uncompensated elements that one needs to be able to understand the various methods for span temperature
compensation.
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01/08/2007 |
SCC - OFFSET TEMPERATURE COMPENSATION (open bridge)
The SCC series pressure sensor self compensates gage factor thermal errors when operated with a constant current source (SCC application information figure 4). The temperature coefficient of the sensor bridge impedance has been designed to be equal and opposite to the sensors gage factor (mV/V/psi) temperature coefficient.
The other source of thermal error is the sensors offset voltage vs. temperature. This error can be compensated by measuring the sensors and adjusting an external resistive network.
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02/10/2006 |
INTRODUCTION TO RELATIVE HUMIDITY
What is relative humidity? Air, in our normal environment, always holds humidity. The number of water molecules in the air can vary substantially, e.g. it can be as dry as in a desert or as humid as in the tropics. There is an upper limit for the amount of humidity which air can hold at a given temperature. Beyond this limit saturation occurs. If for some reason the humidity level is pushed up to this limit, condensation occurs and fog or water droplets form. Relative humidity tells you what percentage of this maximum amount of humidity is present in the air. In contrast to relative humidity, absolute humidity denotes the absolute amount of humidity in the air regardless of the saturation level expressed as the total mass of water molecules per air volume.
The maximum possible amount of humidity as well as the actual present amount of humidity in the air are defined by so called water vapor pressures.
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10/02/2006 |
THE DEW-POINT TEMPERATURE CAN BE EASILY CALCULATED FROM THE RELATIVE HUMIDITY AND TEMPERATURE
The dew-point temperature is the temperature to which the air must be cooled to reach saturation (assuming air pressure remains the same). When the temperature cools to the dew point, fog or dew can occur, and the relative humidity becomes 100%.
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