The MMR920 micro pressure sensor with bi-directional measurement, robust construction, and high sensitivity makes it an ideal sensor for extraction and dispensing automated pipette robots. A miniaturized size of 7 mm x 7mm x 7.2mm size makes this sensor easy to integrate into a tight space.  The MMR920 pressure cavity isolates pressure media to only the backside of the silicon pressure die keeping the electronics on the other side from being contaminated by harmful humidity.   The MMR920 measures both positive and negative pressure with resolution as low as 1 Pascal.

The MMR920 utilizes proven microelectromechanical systems (MEMS) piezoresistive technology (PRT) sensor element with a 24-bit Analog Front End.  Low pass filter is integrated allowing for smooth and high-resolution signal with the ability to detect fluid drop being dispensed from a pipette. The following GIF shows the sensor detecting drops of water leaving a 4 mm diameter tube after being extracted from a beaker. Pressure inside the tube rises incrementally as each fluid drop exits the tube.

Standard inch and metric series radial bearings reduce friction and allow for moderate axial and radial loads. Chrome steel, stainless steel, and specialized anti-corrosive steel bearings are available with crown or ribbon type retainers. We also offer mechanical bearing assemblies which are high precision custom products, manufactured to the highest standards of quality, cost effectiveness and reliability. These machined components such as magnets, gears, molded and machined plastic parts, die cast parts and special materials are designed and manufactured to work precisely with our precision ball bearings. Our assembly process and inspection methods have been optimized to produce the highest quality product for liquid handling automation equipment.