![]() Pipe thread mounts are well suited for some general applications.Īutomotive in-cylinder pressures, ballistic pressures, and free-field blasts are examples of applications where thermal shock accompanies the pressure pulse. Pipe threads offer the convenience of an easier machined port than straight threads. Pipe thread mounts do not allow precision positioning of the sensor depth because the seal is achieved through progressive tightening of threads in the tapered hole until the required thread engagement is reached. For more detailed information on pressure sensor adaptors and accessories refer to the PCB Accessories for Pressure Sensors webpage.Ĭontrol of the location of the pressure sensor diaphragm is achieved with a straight thread/seal ring mount. Pipe thread adaptors have tapered threads, which result in the threads creating the pressure seal. Pressure sensors and adaptors with straight machined threads use a seal ring as a pressure seal. PCB has various mounting adaptors that aid in pressure sensor mounting. If you are using PCB® pressure sensors and have lost or misplaced the seals, call PCB to request replacement seals as no-charge samples. Before reinstalling a pressure sensor, check the mounting port to make sure that the old, distorted seal ring has been removed from the mounting hole. Order enough spare seal rings or sleeves for applications that require frequent removal and reinstallation of the pressure sensor. Certain models, such as Series 111, 112, and 113 can be provided with seal sleeves for recess mounting ports. Most PCB pressure sensors are supplied with seal rings for flush mounting. Use an O-ring mount to minimize this effect.įigure 5 - Typical recessed mount for 113B pressure sensor series. In applications such as free-field blast measurements, a pressure sensor mounted in a thin plate can be subjected to side loading stresses when the pressure causes the plate to flex. Causes of side strains to the upper body include: a taut cable pulling at right angles to the electrical connector, and using a heavy adaptor with a cable attached to the small electrical connector in an environment with high transverse vibration. Proper installation minimizes distortions in the output signal. It is important to avoid unusual side loading stresses and strains on the upper body of the sensor. ![]() Side loading of this part of the sensor during a pressure measurement creates distortions in the signal output. The sensing crystals of many pressure sensors are located at the diaphragm end of the sensor. ![]() Various standard thread adaptors are available to simplify some sensor installations.įor free-field blast applications, use aerodynamically clean mounts to minimize unwanted reflections from mounting brackets or tripods. Mounting hardware is supplied with PCB sensors. Use good machining practices for the drilling and threading of mounting ports, and torque the sensors to the noted values. ![]() Always check the installation drawings supplied in the manual with the sensor, or contact PCB to request detailed mounting instructions. Precision mounting of pressure sensors is essential for good measurements. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |