SS40A

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The SS40A magnetic sensor switch is a solid state device that is designed for use as a low-cost current sensing device with a low-, medium-, and high-coercivity magnet. It can be used to provide a reliable, accurate, and low-compliance indication of currents in medium-voltage and high-voltage circuits. The device works by detecting and measuring the magneto-inductive inductance of the electric current flowing through the circuit. This inductance induces an AC voltage that is proportional to the magnitude of the current.

The SS40A has two states, the "ON" and the "OFF" states, and it can be used for both AC and DC applications. In the "ON" state, the switch is closed, allowing current to flow freely. In the "OFF" state, the switch opens, preventing current from flowing. This switch can also be connected to a variety of signal processing electronics to enhance its sensing capabilities. For example, it can be connected to a PLC (programmable logic controller) to monitor various inputs and detect changes in the value of the voltage.

When choosing a magnetic sensor switch for a specific application, it is important to consider the following factors: the operating voltage, the current carrying capability, the operating temperature range, and the degree of sensitivity. It is also important to select a switch that is compatible with the specific application it is being used for. The device should be suitable for the application and should not be subject to false triggering due to environmental factors.

The SS40A magnetic switch is constructed using a miniaturised plastic housing, with a single connector to facilitate a low-cost, reliable installation. The interior of the switch contains two independent sensing components, a magneto-inductive coil and a Hall effect device. The Hall effect device is required to activate the sensing components, and the magneto-inductive coil is used to measure the inductance of the current.

The SS40A works on the principle of Faraday’s law, which states that when a magnetic field is applied to a conductor, a voltage is induced in the conductor. The SS40A measures the voltage of the current flowing through the conductor and calculates the resultant magneto-inductive inductance. This inductance is then used to trigger the Hall Effect device, which in turn activates the sensing components. This enables the switch to detect a change in the value of the inductance, thereby providing a reliable indication of the value of the current.

The SS40A magnetic switch is cost effective and is suitable for a variety of applications, including current protection, static current detection, level monitoring, control system sensing, and other industrial applications. It can be used to detect both AC and DC currents, and is compatible with virtually any signal processing electronics. Its small size and low power consumption make it an ideal choice for a wide range of applications.

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