Which statement best describes a difference between electronic sensors and limit switches?

• A. Electronic sensors have slower response than limit switches
• B. Electronic sensors react faster than limit switches
• C. Electronic sensors are always cheaper than limit switches
• D. Electronic sensors require more maintenance

Answer: (B)

Response speed is the key difference between electronic sensors and limit switches. Electronic sensors use non-contact sensing and solid-state electronics to detect changes and switch outputs almost instantly, with no moving parts to slow things down. Limit switches rely on mechanical movement of a lever or button, which introduces slower response and can suffer from contact bounce and wear over time. Because of these factors, electronic sensors generally react faster than limit switches, making that statement the best description. While cost or maintenance can vary by model and environment, speed differences are the most consistent distinction.