在一般的工业生产场所，通常都选用涡流式接近开关和电容式接近开关。因为这两种接近开关对环境的要求条件较低。
当被测对象是导电物体或可以固定在一块金属物上的物体时，一般都选用涡流式接近开关，因为它的响应频率高、抗环境干扰性能好、应用范围广、价格较低。
若所测对象是非金属（或金属）、液位高度、粉状物高度、塑料、烟草等。则应选用电容式接近开关。这种开关的响应频率低，但稳定性好。安装时应考虑环境因素的影响。
若被测物为导磁材料或者为了区别和它在一同运动的物体而把磁钢埋在被测物体内时，应选用霍尔接近开关，它的价格最低。
在环境条件比较好、无粉尘污染的场合，可采用光电接近开关。光电接近开关工作时对被测对象几乎无任何影响。因此，在要求较高的传真机上，在烟草机械上都被广泛地使用。
在防盗系统中，自动门通常使用热释电接近开关、超声波接近开关、微波接近开关。有时为了提高识别的可靠性，上述几种接近开关往往被复合使用。
无论选用哪种接近开关，都应注意对工作电压、负载电流、响应频率、检测距离等各项指标的要求。
In general industrial production sites, eddy current proximity switches and capacitive proximity switches are commonly used. Because these two types of proximity switches have lower environmental requirements.
When the tested object is a conductive object or an object that can be fixed on a metal object, eddy current proximity switches are generally chosen because of their high response frequency, good resistance to environmental interference, wide application range, and low price.
If the measured object is non-metal (or metal), liquid level height, powder height, plastic, tobacco, etc. A capacitive proximity switch should be selected. This type of switch has a low response frequency but good stability. Environmental factors should be considered during installation.
If the measured object is a magnetic material or if magnetic steel is buried inside the measured object to distinguish it from objects moving together, a Hall proximity switch should be used, which has the lowest price.
In environments with good environmental conditions and no dust pollution, photoelectric proximity switches can be used. The photoelectric proximity switch has almost no impact on the measured object during operation. Therefore, it is widely used in both high demand fax machines and tobacco machinery.
In anti-theft systems, automatic doors typically use pyroelectric proximity switches, ultrasonic proximity switches, and microwave proximity switches. Sometimes, in order to improve the reliability of recognition, the above-mentioned proximity switches are often used in combination.
Regardless of the type of proximity switch selected, attention should be paid to the requirements for various indicators such as working voltage, load current, response frequency, detection distance, etc.
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