Features Reliable Vehicle Detection: Accurately detects the presence and passage of vehicles, ensuring smooth traffic flow in your car parking lot Easy Manual Reset: Features a reset switch that allows for quick re-tuning of the sensing loop during commissioning and testing for optimal performance Customizable Pulse Duration: Select between 1 second or 0.5 seconds for pulse relay activation, providing flexibility based on your specific parking needs Versatile Relay Configuration: Choose to energize the pulse relay when a vehicle is detected or when it exits the loop, adapting to various operational requirements Extended Detection Capability: The permanent presence option ensures continuous detection of vehicles parked over the loop, enhancing security and management efficiency Features: 1、Made of sturdy plastic, light in weight, very , and can be used with confidence. 2、The capacity is large, the size of a single hole is about 25x25mm, and it can hold 24 test tubes in total. 3、Easy to disassemble and install, the test tube rack has 3 separate parts, which need to be assembled for use. 4、It is easy to carry, can be stored together, can also be disassembled and laid flat, saving space. 5、Easy to clean, the three？layer design allows easy insertion and removal of the tube, which is very convenient. Specification: Item Type: Test Tube Rack Material: ABS Hole Size: Approx. 25x25mm / 1.0x1.0in Purpose: Load test tube Number of Holes: 24 Package List: 3 x Test Tube Rack Board 1 x Manual Package List 3 x Test Tube Rack Board 1 x Manual