Photocell are sensors that detect light. When they are used with barrier gates, they work by triggering the gate to open or close when a certain level of light is detected.    Here's how it works:   1. When the photocell is exposed to light, it generates an electrical signal. 2. This signal is sent to the control unit of the barrier gate. 3. The control unit then activates th...

Boom barriers (or toll barrier gate) are equipped with multiple safety features to prevent accidents, protect vehicles, and ensure smooth operations. Here are the key safety mechanisms commonly found in barrier gates:     1. Auto-Retraction Mechanism     - If the barrier arm detects an obstacle (like a vehicle or person) while closing, it automatically stops and rever...