AH1802-FJG-7

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Magnetic sensors and switches have long been used for detecting changes in magnetic fields, either naturally occurring or those artificially generated by other sensors. Solid-state switches, also known as contactless switches, are specially designed for use in automation systems and electro-mechanical applications, where a physical contact between the switch and its application is not necessary. The AH1802-FJG-7 magnetic sensor switch is a reliable, high-performance solution for many applications. This article looks at its application field and working principle.

Applications

AH1802-FJG-7 solid state switches are designed to detect the presence of a magnetic field, either that generated by other magnetic sensors or that occurring naturally. They are used in a wide variety of applications, including automotive, aerospace, consumer electronics, and industrial automation. Common uses include motion and position sensing, linear and rotary actuators, door interlocks, and intrusion alarms.

The AH1802-FJG-7 switch is designed for extended operation in both normal and harsh environmental conditions. It is built using a rugged aluminum alloy housing and features an IP67 degree of protection, which covers it from dust, dirt, and handling. Additionally, the switch can operate in temperatures ranging from -40°C to +185°C making it suitable for use in extremely cold or hot environments. Furthermore, its wide operating voltage of 4.5 V to 25 V DC allows it to be used in low power applications as well as high power ones.

Working Principle

The AH1802-FJG-7 switch operates by sensing changes in the external magnetic field. This is achieved by a sensing coil embedded in the switch, which is able to detect changes in the magnetic field. When a change in the magnetic field is detected, the coil will generate a voltage. This voltage is then amplified and used to control the switch.

The sensitivity of the AH1802-FJG-7 can be adjusted to user-defined limits by adjusting the amplifying coils. This can be done using a trimpot, which is accessible on the switch housing. When the magnetic field is equal to or greater than the set sensitivity, the switch opens or closes depending on the user settings.

In terms of design, the AH1802-FJG-7 switch is built as a two-pole switch, meaning that it consists of two independent contacts. This allows users to configure the switch to operate in single-pole or dual-pole mode for increased versatility. Furthermore, the switch also features a built-in loudspeaker for audible indications.

Conclusion

The AH1802-FJG-7 magnetic sensor switch is a high-performance solution for detecting changes in magnetic fields for many applications. It is designed for extended use in a variety of environments, and offers good adjustability. With its built-in loudspeaker and dual-pole design, the switch is a versatile and convenient solution for a wide range of applications.

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