A good product can bring a lot of convenience to our work. If a bad product not only costs us money, but more importantly, it may bring us a lot of inconvenience and even greater financial loss. Therefore, when choosing a product, we should know how to judge its quality. So how should we judge the quality of the electronic ruler/shift sensor?

　　1. Determine the type according to the measurement object and the environment

　　First of all, carefully analyze the measurement work, and consider which principle of electronic ruler to use for measurement, because even if the same physical quantity is measured, it can be achieved by different principles. Next, you have to consider the range, volume (is there enough space), installation method, signal type (analog or digital signal), measurement method (direct measurement or indirect measurement) and so on.

　　2. Accuracy

　　The accuracy level of the electronic ruler is related to the accuracy of the entire system and is a very important parameter. In general, the higher the accuracy, the more expensive the price. Therefore, when we choose, we have to consider the whole thing, and the one that suits us is the best. Don’t blindly pursue the so-called high precision, unless we need to measure the precise value quantitatively, we choose the electronic ruler with higher precision.

　　3. The choice of sensitivity

　　Sensitivity refers to the ratio of the increment of the output quantity to the corresponding increment of the input quantity. We have to correctly understand this parameter, which is divided into two aspects: 1. In the linear range, the sensitivity is high, and the output signal value is relatively large, which is an advantage. 2. The sensitivity is high, and the external noise unrelated to the measurement is also easily mixed, which affects the accuracy during the processing.

　　4. Linear range

　　The linear range refers to the range in which the output is proportional to the input, so we all hope that the wider the linear range, the better, the wider the linear range, the larger the range and the higher the accuracy. But the linear range of any displacement sensor is relative. We just need to estimate the measurements so that they are within the linear range.

　　V. Frequency Response Characteristics

　　During the measurement process, the output of the displacement sensor always has a certain delay, which is also different from the actual value. So we want the frequency response to be a bit faster so that the delay time is shorter. However, due to the influence of characteristics such as structure, it is difficult to increase the frequency.

　　6. Stability

　　Stability refers to the ability to maintain the same performance after a long period of use. In addition to its own reasons, the factors that affect the stability are mainly environmental factors. Therefore, the selected electronic ruler/displacement sensor must have strong environmental adaptability, and protective measures must be taken when appropriate.

　　Buyers in need should try their best to choose regular production and distributors when purchasing electronic rulers. While the quality is guaranteed, the cost performance is also relatively high. I hope everyone can buy high-quality electronic rulers!