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It’s hot now; the transmitter needs to be cleaned too. While differential pressure transmitters generate profits for us, we must not forget that they also require maintenance, as every device has its own limits of operation. So how can we maintain it better and help keep the transmitter “clean”? Here, I’d like to share some tips on the maintenance and cleaning of differential pressure transmitters, in the hope that they can be helpful to everyone. 1. Thorough cleaning: Before cleaning the extruder barrel using a wire brush or special compounds, all transmitters should be removed. Because both of these cleaning methods can potentially damage the diaphragm of the differential pressure transmitter. When the barrel is heated, the differential pressure transmitter should also be removed, and its top surface should be wiped with a soft cloth that does not cause wear; meanwhile, the holes in the sensor need to be cleaned using a clean drilling machine and guide sleeves. 2. Avoid interference from low temperatures: During the extrusion process, plastic raw materials need sufficient \"soak time\" to transition from a solid state to a molten state. If the extruder has not reached its operating temperature before starting production, both the differential pressure transmitter and the extruder will suffer some degree of damage. Furthermore, if the differential pressure transmitter is removed from a cold extruder, material may adhere to the top of the transmitter and cause damage to the diaphragm. Therefore, before removing the sensor, it is necessary to ensure that the temperature of the barrel is high enough and that the material inside the barrel is in a softened state. 3. Keep the mounting holes clean: Maintaining the cleanliness of the mounting holes and preventing them from being blocked by molten material is crucial for ensuring the proper operation of the equipment. Before the extruder is cleaned, all differential pressure transmitters should be removed from the barrel to avoid damage. When removing the sensor, molten material may flow into the mounting hole and harden; if this residual molten material is not removed, it may cause damage to the top of the differential pressure transmitter when it is installed again. The cleaning kit can remove these melt residues. However, repeated cleaning processes may exacerbate the damage caused to the sensor by the mounting holes. If this happens, measures should be taken to raise the position of the sensor within the mounting hole. This is generally how routine maintenance and cleaning are carried out. To ensure that the transmitter operates properly for a long time, it also needs to be inspected and maintained after use. Next, I will share with you eight maintenance methods to be followed after use. 1. Prevent residue from accumulating inside the conduit and prevent the transmitter from coming into contact with corrosive or overheated media. 2. When measuring gas pressure, the pressure tap should be located at the top of the process pipeline, and the transmitter should also be installed above the pipeline, so that accumulated liquid can easily be introduced into it. 3. When measuring liquid pressure, the pressure tap should be located on the side of the process pipeline to prevent the accumulation of sediment. 4. The pressure guide tube should be installed in a location with minimal temperature fluctuations. 5. When measuring liquid pressure, the transmitter should be installed in a location where it is protected from liquid impacts (water hammer effect), to prevent the sensor from being damaged by excessive pressure. 6. When making the connections, pass the cable through the waterproof connector or flexible tube and tighten the sealing nut to prevent rainwater and other substances from seeping into the transmitter housing via the cable. 7. When measuring steam or other high-temperature media, a condenser such as a buffer tube (coil) must be used to prevent the operating temperature of the transmitter from exceeding its limits. Since many customers do not know how to inspect and maintain transmitters when using them, this leads to unnecessary damage to the equipment. If we inspect and take care of the equipment after use, and properly clean and maintain the transmitters, we can extend their service life and improve efficiency.