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Common Problem Types

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What is the meaning of flush and non-flush sensors?

It refers to the installation method of the sensor. Flush installation can be buried in the metal, and non-flush installation can not be buried in the metal, but the operating distance is longer than flush detection distance. Flush mounting: The sensor is embedded in the metal base, and its effective sensing working surface is flush with the base surface. Non-flush mounting: The sensor is not embedded in the metal base, and its effective inductive working surface must maintain a certain size with its seat. The same specification proximity sensor, non-flush type can obtain the maximum sensing distance. The advantages of flush mounted sensors are that they have better mechanical protection and greater anti-interference ability than non-flush mounted sensors. The operating distance of a flush mounted sensor is about 69% of that of a non-flush mounted sensor.

What's electroplating of the detection object?

If the surface of the detection object is electroplated, the operating distance will change. In particular, after the surface treatment of iron, the movement distance will be shortened by 10-30% according to the different types of electroplating.

What is the voltage drop?

Voltage drop refers to the voltage measured at both ends of the sensor or at the output end when the sensor is switched on.

What's the concept of proximity sensor?

The proximity sensor is used to detect the proximity of the object and control the switch in the non-contact state by using the sensor's sensitive characteristics to the approaching object. In the commonly used proximity sensors, according to the different principle of induction, proximity sensors can be divided into high-frequency oscillation type, magnetic induction type and electrostatic capacitance type.

What's the basic concept of sensing distance?

The sensing distance is the distance between the standard detection object and the sensing surface when the sensor is operated. Normally open means status from disconnected to connected, while normally closed is opposite. The standard sensing distance is the distance between the standard detection object and the sensing surface when the sensor is operated without considering the tolerance, operating temperature, power supply voltage, etc., and is a theoretical value. The effective sensing distance is the sensing distance measured by a single proximity switch under a specific installation environment, temperature and voltage, which is generally measured at rated operating voltage and room temperature (23±5° C). The actual sensing distance is the sensing distance of a single proximity sensor under specific temperature and voltage conditions, which is generally measured within the allowable ambient temperature of -25 ° C +-+70 ° C, and the input voltage is measured within the range of 85% to 110% of the rated voltage. Reliable sensing distance refers to a distance between the operating point and the sensing surface after the correct operation of the proximity switch under specified conditions.

What is the definition of protection degree?

The IP protection level system is drafted by the INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC). Electrical appliances are graded according to their dustproof and moisture-proof properties. The objects referred to here include tools, and human fingers are not allowed to touch the live part of the electrical appliance to avoid electric shock. The IP protection level is composed of two numbers, the first number indicates the level of the product from dust and prevent other objects intrusion, the second number indicates the degree of tightness of the product against moisture and waterproof intrusion, the larger the number indicates the higher the protection level.

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