Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.

A differential pressure sensor includes a containment body including internally a wall creating first and second cavities, a piston slidingly housed in the first cavity and including a magnet mounted on a first axial end thereof, proximal to the wall and a magnetic sensor housed in the second cavity, near the wall for measuring the axial distance of the magnet from the wall and generating a signal representing such distance. The pressure sensor further includes a lighting element for emitting light radiation, a control circuit operatively interposed between the magnetic sensor and the lighting element and configured for varying the light radiation emitted by the lighting element as a function of a variation in the representative signal generated by the magnetic sensor. An interface element includes a radiant surface facing outwards from the body and an optical guide, extending between the lighting element and the radiant surface.

A differential pressure sensor includes a containment body including internally a wall creating first and second cavities, a piston slidingly housed in the first cavity and including a magnet mounted on a first axial end thereof, proximal to the wall and a magnetic sensor housed in the second cavity, near the wall for measuring the axial distance of the magnet from the wall and generating a signal representing such distance. The pressure sensor further includes a lighting element for emitting light radiation, a control circuit operatively interposed between the magnetic sensor and the lighting element and configured for varying the light radiation emitted by the lighting element as a function of a variation in the representative signal generated by the magnetic sensor. An interface element includes a radiant surface facing outwards from the body and an optical guide, extending between the lighting element and the radiant surface.

Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.

Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.

Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.

Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.

An example printing fluid pressure sensor comprises a first pressurizable chamber having an inlet to receive a pressurized gas and a second chamber to receive a printing fluid. A flexible element is disposed in between the first and second chambers and is to retain a magnet. A first side of the flexible element forms a wall of the first chamber and a second side of the flexible element forms a of the second chamber to seal the first and second chambers. The example sensor further comprises a sensor to detect the position of a magnet relative to the sensor. The sensor is disposed outside of the first and second chambers.

An example printing fluid pressure sensor comprises a first pressurizable chamber having an inlet to receive a pressurized gas and a second chamber to receive a printing fluid. A flexible element is disposed in between the first and second chambers and is to retain a magnet. A first side of the flexible element forms a wall of the first chamber and a second side of the flexible element forms a of the second chamber to seal the first and second chambers. The example sensor further comprises a sensor to detect the position of a magnet relative to the sensor. The sensor is disposed outside of the first and second chambers.

A method for estimating the load of a tire supporting a vehicle includes providing the tire, in which the tire includes a pair of sidewalls extending to a circumferential tread, and the tread includes a plurality of tread blocks. A length of the tire footprint is indicated with a first time interval, and a full rotation of the tire is indicated with a second time interval. The first time interval may be indicated by peaks of an amplitude of a tire-based magnetic sensor signal, and the second time interval may be indicated by peaks of the amplitude of the tire-based magnetic sensor signal or by a linear speed of the vehicle. The load on the tire is determined from a ratio of the first time interval to the second time interval at an inflation pressure of the tire. A tire load estimation system is also provided.