Kistler Offers Miniature Absolute Pressure Sensor for Engine Development, Now with Cooling Adapter

Thanks to the adapter’s high cooling capacity, the miniature sensor remains within its permitted temperature range even at high temperatures, so it delivers excellent measurement results with a minimal space requirement.

Piezoresistive absolute pressure sensors are suitable for recording static and dynamic pressures. They have long been used in the automotive industry for engine and powertrain development, where high accuracy levels are required. To enable this degree of precision at elevated temperatures, the sensor needs additional cooling.

New design offers maximum quality and cooling capacity
The new 4017A…W set from Kistler, comprising the water-cooled 7547A adapter and the 4017A – the world’s smallest media-separated absolute pressure sensor – comes with an M8x0.75 threated pressure connection. This means that the set is 25 percent smaller than Kistler’s tried-and-tested water-cooled 4049B sensors, so it is easier to adapt for measurements on engines with limited available space. Cooling is more efficient thanks to the adapter’s low mass and innovative design, together with its optimized cooling channels – so sensor lifetime and reliability are increased. Due to the 7547A adapter’s welded-on heat shield, the 4017A sensor remains within its specified temperature range even in hot environments. The new set’s low weight makes it less susceptible to damage caused by engine vibrations.

Ideal for engine development
The modular structure of the 4017A…W set makes it easy to replace the sensor as well as the adapter. For cleaning purposes, the 4017A miniature absolute pressure sensor can simply be disconnected from the adapter and then refitted. The 4017A’s oil-filled, media-separated measuring cell offers a very high level of media compatibility for gaseous media. This also results in very high measurement accuracy and stability (≤1% FSO), achieved thanks to digital temperature compensation.

Water cooling plus integrated digital temperature compensation
Thanks to PiezoSmart technology from Kistler, the miniature absolute pressure sensor is automatically recognized by DS-compatible Kistler amplifiers, thus eliminating the risks of incorrect setup and configuration. The digital temperature compensation uses a specific model-based compensation process to correct the output signal according to the sensor temperature, without a delay and with maximum accuracy. In addition, digital temperature compensation provides monitoring of the sensor temperature.

To complete the measuring chain, various piezoresistive amplifiers are available from Kistler: examples include the 4665B 2-channel amplifier (SCP, KiBox1), the 4667A 1-channel PRAQ (KiBox2), and the 4624A 1-channel amplifier (standalone). The new 4017A…W set can be supplied in various measuring ranges for pressures up to a maximum of 50 bar.