On the matters needing attention in sensor selection

Modern sensors vary greatly in principle and structure. How to select sensors reasonably according to the specific measurement purpose, measurement object and measurement environment is the first problem to be solved when performing a certain amount of measurement. After the sensor is determined, the matching measurement method and measurement equipment can be determined. The success or failure of the measurement results depends to a large extent on whether the selection of sensors is reasonable.

(1) Determine the type of sensor according to the measurement object and measurement environment.

(2) The choice of sensitivity. Generally, in the linear range of the sensor, the higher the sensitivity of the sensor, the better. However, it should be noted that the sensitivity of the sensor is high, and the external noise that is not related to the measurement is also easily mixed. It will also be amplified by the amplification system, affecting the measurement tip. therefore. It is required that the sensor itself should have a high signal-to-noise ratio to minimize interference signals introduced from the outside.

(3) Frequency response characteristics. The frequency response characteristic of the sensor determines the frequency range to be measured. The measurement conditions must not be distorted within the allowable frequency range. In fact, the sensor response will always have a certain delay. It is hoped that the shorter the delay time, the better the frequency response of the sensor. The measurable signal frequency range is wide due to the structural characteristics. The inertia of the mechanical system is large because the frequency of the signal that can be measured by the sensor with low frequency is low. In the dynamic measurement, the response characteristics should be based on the characteristics of the signal (steady state, transient, random, etc.), so as to avoid excessive fire errors.

(4) Linear range The linear range of the sensor refers to the range in which the output is proportional to the input. In theory, the wider the linear range of the sensor, the greater the mileage, and it can ensure a certain measurement accuracy. When selecting a sensor. When the type of sensor is determined, it is first necessary to see whether its range meets the requirements. In fact, no sensor can guarantee absolute linearity, and its linearity is also relative. When the required measurement accuracy is relatively low, within a certain range, sensors with small nonlinear errors can be regarded as linear, which will bring great convenience to the measurement.

(5) Stability. After using the sensor for a period of time. The ability to keep its performance unchanged is called stability. The factors that affect the long-term stability of the sensor are in addition to the structure of the sensor itself. It is mainly the use environment of the sensor. Therefore, to make the sensor have good stability, the sensor must have strong environmental adaptability.

(6) Accuracy. Accuracy is an important performance index of the sensor, it is an important link related to the measurement accuracy of the entire measurement system. The higher the accuracy of the sensor, the more expensive it is. Therefore, as long as the accuracy of the transmitter meets the accuracy requirements of the entire measurement system, it does not have to be too high. In this way, it is possible to select a cheaper and simpler sensor among many sensors that meet the same measurement purpose.

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1)    From the diameter, we have speakers in 23mm ~ 57mm.

2)    From the impedance, we have speakers of 32ohm/150ohm/300ohm/1000ohm.

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FAQ

     Q1. What is the MOQ?
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 15 days for normal orders, 10 days for urgent orders. 
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram. 
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples. 
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.

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