1、 Installation and testing distance

1. Installation distance control
   • Rated sensing distanceThe actual detection distance should be controlled within 80% of the rated value (e.g. rated 10mm, recommended ≤ 8mm) to avoid detection failure due to excessive distance.
   • Return distanceThe minimum distance between the sensor and the metal object should be greater than the hysteresis distance (≤ 10% of the rated sensing distance) to prevent frequent signal jitter. For example, for a sensor rated at 10mm, the minimum distance should be greater than 1mm.
   • Installation MethodWhen installing directly, ensure that the threaded end of the sensor is tightened (torque meets product requirements, such as 0.5-1.5N · m) to avoid loosening or tilting; When installing the bracket, adjust the angle and tighten the screws to prevent displacement.
2. Detecting object adaptability
   • Material limitationsOnly applicable to conductive metals such as iron, steel, copper, aluminum, etc. Non metals (such as plastic, wood) cannot trigger detection.
   • Size requirementsWhen detecting small-sized metals, it is necessary to ensure that the object enters the circular sensing area to avoid partial obstruction and misjudgment. For example, when detecting a steel ball with a diameter of 2mm, it is necessary to ensure that the center of the steel ball is aligned with the center of the sensor.

2、 Environmental adaptability

1. Temperature and Humidity
   • temperature rangeThe working environment temperature should be controlled between -25 ℃ and+70 ℃ (except for low-temperature customized models), and avoid being close to high-temperature heat sources (such as welding arc light and heating tubes).
   • Humidity limitAlthough some sensors support IP67 protection (such as short-term immersion), they should not be immersed in water for a long time to prevent damage to internal circuits.
2. Electromagnetic interference and dust
   • Strong magnetic field avoidanceKeep away from strong magnetic fields such as large electromagnets and high-frequency welding machines. If it is impossible to avoid them, add a metal shielding cover and increase the distance to at least 50cm.
   • Dust protectionIn environments with high levels of dust (such as woodworking workshops), choose sensors with high protection levels (such as IP67) and regularly clean the dust on the sensing surface to prevent signal attenuation.

3、 Electrical parameters and wiring

1. Power Supply and Voltage
   • Voltage MatchingConfirm that the voltage and frequency of the power supply are consistent with the rated parameters of the sensor (such as DC 12-24V or AC 220V), to avoid damaging the sensor due to high or low voltage.
   • Connection sequenceWhen the load and sensor use different power sources, it is necessary to first connect the sensor power supply before connecting the load power supply to prevent transient surge current from damaging the equipment.
2. Wiring specifications
   • Positive and negative pole differentiationStrictly distinguish the positive and negative poles of the power cord (such as connecting the brown wire to the positive pole and the blue wire to the negative pole), as reversing the connection may cause damage to the sensor.
   • Output load limitThe load current at the output end shall not exceed the rated value (such as 200mA). If high-power equipment (such as motors and solenoid valves) needs to be driven, a relay should be used to prevent overloading and burning of the internal circuit.

4、 Load and signal processing

1. Load matching
   • Sensory load handlingWhen using inductive loads (such as relay coils), it is necessary to convert them through AC relays to avoid excessive transient surge currents that can damage the sensor.
   • Multi sensor collaborationIf multiple sensors are running simultaneously, frequency switching function or adjustment of installation position is required to prevent mutual interference.
2. Signal Stability
   • Selection of shielded sensorsIn environments with high accuracy requirements or metal objects around, shielded sensors should be selected to reduce external interference.
   • Signal jitter processingIf the indicator light flashes or the signal is unstable, check whether the target object deviates from the trajectory, whether there is metal dust accumulation on the sensing surface, and clean the sensing surface in a timely manner (wipe with a dry cloth, do not use water or corrosive cleaning agents).

5、 Maintenance and extended lifespan

1. Regular inspection and cleaning
   • Visual inspectionRegularly check whether the sensor housing is damaged or cracked, and whether the circular sensing surface has stains or scratches. If there is any damage, it needs to be replaced before use.
   • Cleaning of sensing surfaceWipe the sensing surface with a dry cloth. Do not use water or corrosive cleaning agents to prevent damage to the coil or circuit.
2. Lifecycle Management
   • avoid collisionTo prevent direct collision between the sensor sensing surface and metal objects, if there is a risk of collision in the detection scene, protective pads (such as plastic pads) should be installed in front of the sensing surface.
   • Storage conditionsWhen stored for a long time, place the sensor in a cool, dry, and ventilated room, avoiding direct sunlight and high temperature environments.