In sensor features analysis we know there are many aspects of the performance indicators. Sensor design is a mechanical, electrical, chemistry, biology and material science in many aspects, such as comprehensive, if you want good every performance index of the sensor is achieved, which brings difficulty to make, and in practical application, there may be some indicators for one - special measured signal does not affect. Therefore, in designing and selecting sensors. First of all, should according to the characteristics of the measured signal, on the main aspects of the performance index of the sensor. Don't have to pursue comprehensive performance index, for example, under the condition of static testing for dynamic performance index requirements, there is no need to consider. Second is the cause of the sensor performance is not stable, or               environmental conditions change over time, constitute a sensor performance of various materials and components are changing. To measure the required accuracy, when choosing using sensors, should be comprehensive considered the pros and cons of the design scheme of measurement circuit. Determine the performance of the sensor. Should also be considered when designing the product, the price than, for example the use of microcomputer can solve the nonlinear of the sensor, it reduces the requirement for the sensor, but the corresponding increase the cost of the microcomputer in the product. When using the sensor design, the following comprehensive several methods about how to improve the sensor performance:

In the design of sensor, the first should be the requirements of the test environment, the measured signal to point, the accuracy requirement of the test, and the main aspects of consideration, determine the parameters for the sensor performance and the working environment and other important indicators. In the case of meet the above conditions, considering the types of sensors, structure, parameters such as material, size, weight, and life.

The stability of the sensor is refers to the sensors in a long period of time the ability to maintain its performance parameters, general use at room temperature over a period of time, after the output of the sensor and the output of the initial calibration difference degree. The cause of the sensor performance is not stable is a sensor of various materials and components performance over time or conditions make the change of the sensor performance index change. The working status of the sensor for a long time. Because of its materials and components of aging, the change of its output directly affect the accuracy of the test. In order to improve the stability of the sensor performance, it should be on the material, components so that the sensor is necessary to treat the stability of the whole. For magnetic materials, conductive materials, insulation materials, such as electrical material, they can be stored for a period of time, and if necessary the work voltage applied in advance, make it work for a period of time to stabilize their performance and filtering.