Good reed switch typically has the following characteristics:

High sensitivity: The reed switch is very sensitive to changes in the magnetic field and can be triggered by small changes in the magnetic field.

Quick response: The reed switch has a fast response speed and can be quickly turned on or off.

Long lifespan: The reed switch has no mechanical contact parts, so its lifespan is relatively long and it can usually withstand a large number of switching cycles.

Low power consumption: The reed switch requires less energy during operation, resulting in lower power consumption.

Electrical isolation: The reed switch has good electrical isolation performance and can be switched and controlled between different circuits.

No arc: The reed switch produces almost no arc during the switching process, thereby reducing interference and losses in the circuit.

Small size: The reed switch is compact in size and suitable for applications with limited space.

Anti vibration and anti vibration: The mechanical free design of the reed switch provides it with good resistance to vibration and vibration.

Please note that when choosing a reed switch, specific application requirements such as load current and triggering mode should also be considered.