Hydraulic pressure is something crucial for every hydraulic system. Maintaining the required pressure will help to operate your hydraulic system smoothly without many failures. With the help of a pressure transducer, the pressure in the system can be sampled and recorded. The pressure transducer can optimize the operations of the system by monitoring the performance and efficiency.
The hydraulic pressure transducers can be used for monitoring and controlling hydraulic pressure, only if you have a hydraulic line or chamber. This pressure is then transformed into a normalized, linear, electrical output signal. Strain gauge and thick/thin film are the two common types of hydraulic pressure transducers that require a source of electrical input. A pressure transducer is used in every application that needs to measure pressure. Some applications of the applications are refrigeration system, heavy-duty machine, HVAC/R compressors, fire truck, pumps, braking system, etc… Long term usage; compatibility with harsh environment; and ability to withstand extreme temperature, humidity and vibration are key benefits for using this pressure transducer.
Also Read: Hydraulic System Components and Their Functions in Detail
What are the key features that you need to consider while selecting a hydraulic pressure transducer? Pressure, media & material compatibility, temperature, environment, and accuracy are the factors that affect performance. Among this pressure is the most critical factor that can be determined based on the maximum pressure, burst pressure and proof pressure. Another factor is media & material compatibility, media includes oil, brake fluid, refrigerants, hydraulic fluids functions, etc. Whatever the media it uses, it must be compatible with the wetted surface of the transducer. But, when the media used are ionized water, saltwater, acids and similar, then special consideration needs to be provided while selecting the material. For selecting the right hydraulic pressure transducer, it is important to find the maximum temperature compatibility, that will depend on the temperature of environment and process media. Linearity, hysteresis, and repeatability effects the accuracy of the transducer.
Improper wiring, incorrect polarity, short circuits, vibration/shocks, misapplication, temperature, overpressure/pressure spikes, chemical damages, etc.. are some common problems. Usually, transducers are rugged and durable devices suitable for harsh environments. But, any defect of the hydraulic pressure transducer will negatively affect its longevity and performance.
Similar to all other component troubleshooting, the important factor you require here is good knowledge of hydraulic pressure transducer. Otherwise, take the assistance of an expert technician for troubleshooting. Whenever you detect any issue in hydraulic pressure transducer, the primary things that you need to notice are the installation and material compatibility. After that, you can inspect the interior components and connections by dismantling, only if you have enough knowledge.
Prevention is always effective than troubleshooting or repairing. Here, we can find some tips to eliminate hydraulic transducer problems.
- Prevent Shock & Vibration: Transducers can withstand shock and vibration to a greater extent. But, heavy shocks and vibration will cause frequent problems including disconnected wires, faulty signals, intermittent problems, shortened life span. To prevent this problem, keep the hydraulic pressure transducer away from sources generating shocks and vibration or can use a shock and vibration isolator.
- Avoid Electrical Disturbance: Transducers are used for converting hydraulic pressure to an electrical signal. When this hydraulic pressure transducer is placed near any electromagnetic or radio frequency interference like computers, cell phones, power lines, large machinery, etc.. This signal will influence the output. So, to overcome this issue manufacturers need to place shielding, filtering, and suppression methods.
- Eliminate Voltage Spikes: Small spikes in the voltage can also damage your hydraulic pressure transducers. Heavy voltage spikes lasting for milliseconds can also damage your transducer badly. So, make sure that the selected pressure transducer has taken all prevention techniques to protect your transducer.