1. Reed Relays act quickly, while electromagnetic relays act slowly.

2. Reed Relays have a high operating frequency, while electromagnetic relays have a low operating frequency.

3. Reed Relays have high costs, while electromagnetic relays have low costs.

4. Reed Relays have a long lifespan, while electromagnetic relays have a short lifespan.

Overall, reed relays are superior to electromagnetic relays and can often replace them; But in many cases, electromagnetic relays cannot replace reed relays.

The reed switch, also known as the reed switch, is a circuit with only one switch contact and requires external magnetic force to operate; It cannot be equated with a relay, which has two sets of circuits, and the reed switch cannot replace the relay.