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A Solid State Relay (SSR) is used to control electrical loads without using any moving parts. Unlike traditional electromechanical relays that rely on a physical contact to open and close a circuit, an...

A photoelectric proximity sensor is a type of sensor that detects the presence or absence of an object using a beam of light. Unlike inductive or capacitive proximity sensors, which work using magnetic...

A safety light curtain works as an invisible protective barrier made of light beams. It is used in industrial machines to keep operators safe while allowing the machine to run efficiently. Instead of using...

PNP sensors can be either normally open (NO) or normally closed (NC). The term PNP only tells us about how the sensor output works electrically, not whether it’s open or closed in its normal state. Let’s...

PNP sensors are widely used in automation systems because they output a positive voltage when an object is detected. They’re known as sourcing sensors, and most modern PLCs are designed to easily accept...

NPN sensors refer to the type of transistor output configuration the sensor uses. The terms “normally open” (NO) and “normally closed” (NC) describe how the sensor’s output behaves when no object...