Panasonic Automotive & Industrial Systems has introduced high-precision, miniature semiconductor pressure sensors that are available with built-in amplification and temperature compensation circuitry (PS-A units). Precision sensors without amplifier and open wheatstone measurement bridge are also available and in ultra-miniaturised sizes (PS). There are also versions with chamfered pins for improved ease of DIP pin insertion into PCBs.
The PS-A units come in three types: the standard type with a glass base can handle pressures from ±100 to -1000kPa with a total accuracy of ±1.25%; the economy type without a glass base for 40kPa pressures with ±4% accuracy; and the low-pressure version for 6kPa with ±2.5% accuracy. The sensors' footprint measures 7.0x7.2mm (10.4x10.4mm for the low-pressure type).
Alexander Hoch, Team Leader, Product Marketing Department, Panasonic, commented: “The PS-A units can be used in pressure switches and pneumatic devices in industrial applications. They also have medical uses in blood-pressure monitors, compressed air pressure measurement and air beds as well as in other pneumatically operated pressure devices. And the low-pressure types can be used for water level detection in household washing machiens and dishwashers, air pressure control in clean rooms and medical respiratory pressure measuring instruments.”
The PS and PF sensors come in two versions. The standard type with a glass base is for pressures from 4.9 to 980.7kPa and the economy type without a glass base for 40kPa. The PS models have a footprint of 7.2x7.2mm.
“In the PS version, a high degree of precision and linear detector response has been achieved by applying the semiconductor strain gauge system. This makes them high reproducible based on repeated pressure,” added Hoch.
Taking their place alongside the standard 5kΩ bridge resistance models are PS units with a 3.3kΩ resistance, which is optimally suited to 5V drive circuits. Applications for the PS units include industrial pressure switches and pneumatic devices and medical blood pressure measurement.