Ceramics Used For Sensors

Flow sensors and flow meters.

Ceramics used for sensors.

These electrical signals can be input to feedback systems to stimulate movements in actuators to trigger alarms or to switch the systems on or off. Piezoelectric ceramics are smart materials commonly used in mechatronic devices and smart systems. Discover the wide portfolio and expert know how. The resistance decreases by two to three orders of magnitude in the range 12 to 95 relative humidity.

Types of ceramic pressure sensors. Automotive ceramics advanced ceramic materials that are made into components for automobiles. Ceramic pressure sensors are available in a wide range of designs each suited for use in particular applications. Examples include spark plug insulators catalysts and catalyst supports for emission control devices and sensors of various kinds.

For example ceramic tire pressure monitoring systems warn occupants if there is any sudden loss of tire pressure or if one of the tires is improperly pressurized. All these features make ceramic pressure sensors ideal for a large number of industrial applications particularly if accuracy dynamic range and corrosion resistance are critical requirements. Passive ceramics used in passive sensing applications operate below their. Ceramic sensors are also used in the development of advanced monitoring systems.

This article briefly describes two important automotive applications of. Typical examples are electrical feedthroughs on al 2 o 3 basis to withstand pressure above 1000 bar or substrates made of aln ceramic which thanks to their high thermal conductivity of more than 200 w m k 1 are used in demanding electronic applications. Studies on the sensitivity of the electrical resistance of ceramic sensor materials based on zno tio 2 and sno 2 to humidity acetone ethanol ammonia and temperature are reported. With the acquisition of the electro ceramics division from morgan technical ceramics ceramtec has broadened its already extensive range of piezo ceramic materials and products.

This sector is different from traditional ceramics due to the fact that ceramic powder preparation is quite important. Since ceramics exhibit a number of specific characteristics that enable their cost to become lower and their reliability to increase they have occupied a significant position in sensor technology. Piezoelectric ceramics used as the transmitter typically operate at their resonance frequency while sensors used as a receiver typically operate in an anti resonant mode.