Question 1: what do you want to measure?

This seems obvious, but please think twice. Measure what you really want? In other words, what do you want to do? What are you looking for? What are you going to process the data? Acceleration sensors can monitor the vibration, the vibration data, provide the original vibration transducer to provide a root mean square (RMS) value. Analysis of the original vibration data are useful, because it contains all the information of vibration signal, the real peak amplitude and vibration frequency. Because peak or RMS value is 4-20 mA continuous signals, such as PLC, DCS and SCADA system and PI control system is very useful. Some applications using two signals at the same time. By determining required for the application of all kinds of signals, can greatly reduce the search range. In addition, your vibration is measured in the acceleration or velocity or displacement? Have you ever considered some industrial sensor can output vibration and temperature at the same time? Finally, some field application, such as the vertical pump, it is best to monitor more than one axis vibration. Whether you need your field application under uniaxial and biaxial and triaxial measuring?

Question 2: amplitude have how old?

Measured the maximum amplitude of vibration or range, decided to use which range of sensors. Typical of the acceleration sensor sensitivity 100 mV/g, standard application range (50 g) and 500 mV/g values of low frequency or low-rising application scope (10 g). 4-20 mA transmitter of general industrial applications typically use in/s or 0 0-1-2 / s in range.

Question 3: how much is the frequency?

For different excitation frequency, physical structure and the dynamic system response. Vibration sensor is no different. The nature of the piezoelectric material, like a high-pass filter, therefore, even the best piezoelectric sensors, approximately 0.2 Hz low frequency limit. Sensor as a single degree of freedom dynamic system, has the natural resonant frequency. When natural resonance frequency is greatly enlarged, lead to significant changes in sensitivity, is likely to exceed range. Most industrial accelerometer offset with single or double RC filter resonance frequency of excitation. Choose the sensor range of frequencies available, its scope includes frequency of interest to you, this is very critical.

Question 4: the environment temperature is how many?

For ICP accelerometer and 4-20 ma transmitter, high temperature pose a threat to internal electronics. Charging mode acceleration sensor can be used at very high environmental temperature, its no built-in electronic, but using a remote charge amplifier. Hard line cable charging mode acceleration sensor is equipped with an organic whole, can be used in the temperature over 260 ° ℃ environment, such as gas turbine vibration monitoring.

Question 5: is submerged in a liquid?

Equipped with polyurethane cable industry integrated acceleration sensor can be immersed in liquid permanent installation. For the application of high pressure, the best sensor for an hour of stress tests. Completely submerged applications require one cable. In spraying rather than completely submerged cable is also a demand on the occasion of an organic whole, such as machine tool cutting fluid.

Question 6: whether exposure to potentially harmful chemicals or fragments?

Industrial acceleration sensor can use corrosion resistance and chemical corrosion resistance of stainless steel structure. Of harmful chemicals in the environment, the sensor to consider using ptfe corrosion-resistant connecting cable. Is highly recommended to check any suspicious chemical chemical compatibility chart. To come into contact with the environment of the chip, one armoured cable can provide good protection.

Question 7: do you need to be out, wide, tiny links?

In the end, the sensor needs to be installed in equipment available space to hurt. The shape of the sensors on the performance impact is not big, but need to consider the safety installation and maintenance operations. Equipped with a lock nut design small acceleration sensor, can be in any fixed direction, but with one cable, very convenient.

Question 8: are you using the high precision and low cost sensors?

Low cost and high precision acceleration sensor, there are two major differences. First of all, the unit normally complete calibration accuracy, it refers to the usable frequency range response sensitivity measurement drawing. Low-cost acceleration transducer is a single point calibration, in only one frequency sensitivity measurement. Second, high precision accelerometer with strict tolerance in some specifications such as sensitivity and frequency range.

For example, a high precision accelerometer nominal sensitivity of 100 mV/g + / - 5% (mV / 95 g to 105 mV/g), and a low-cost acceleration transducer nominal sensitivity of 100 V/g + / - 10% (mV / 90 g to 110 mV/g). Customers can be set in the data acquisition system for sensor calibration, sensitivity of such low cost sensors can provide accurate, repeatable data. As for frequency, high precision accelerometer is usually the maximum deviation is 5%, and low cost sensors, can provide 3 dB range of frequencies. However, a low cost sensors can provide excellent frequency response.

Question 9: what do you need special authentication codes?

Get CSA and ATEX certification acceleration sensor and 4-20 mA transducer can be used in the danger zone. Comparing sensor certification, to ensure that it meets your needs.

Nine the answer to the question, can greatly narrow your search, to find the best solution. Bear in mind that together the answer may be mutually exclusive, that is to say, the solution to satisfy each standard does not exist. For example, in the danger zone using specific patterns may not have ATEX certification. In addition, the special field application may have other considerations.