Differential pressure sensors for dynamic, high pressure, hydraulic systems

A hydraulic system, comprising:

• a hydraulic device comprising a device housing enclosing a first fluid volume separated from a second fluid volume;
• and
• a differential pressure sensor comprising:
• a sensor housing comprising a first input port in fluid communication with the first fluid volume and a second input port in fluid communication with the second fluid volume,
• a first sensor tube connected to the sensor housing at a first tube housing end, the first sensor tube extending from the first tube housing end to a first conduit end that is isolated from the sensor housing,
• a second sensor tube connected to the sensor housing at a second tube housing end, the second sensor tube extending from the second tube housing end to a second conduit end that is isolated from the sensor housing,
• a first fluid conduit extending from the first input port, through the sensor housing and the first sensor tube, to the first conduit end, the first sensor tube being configured to experience a first deflection in response to a first fluid pressure within the first fluid conduit,
• a second fluid conduit extending from the second input port, through the sensor housing and the second sensor tube, to the second conduit end, the second sensor tube being configured to experience a second deflection in response to a second fluid pressure within the second fluid conduit,
• a first circuit element bonded to the first sensor tube, the first circuit element having a first electrical characteristic that is dependent upon the first deflection of the first sensor tube,
• a second circuit element bonded to the second sensor tube, the second circuit element having a second electrical characteristic that is dependent upon the second deflection of the second sensor tube, and
• a sensing circuit electrically connected to the first circuit element and the second circuit element, the sensing circuit being configured to determine a pressure differential between fluid in the first fluid volume of the hydraulic device and fluid in the second fluid volume of the hydraulic device based on the first electrical characteristic of the first circuit element and the second electrical characteristic of the second circuit element.