Slotted Infrared Optical switch transistor. 5mm Gap
Related Product: Track Sensor Interface 

No lighting needed, not gantry needed, no fiddly sensor alignment to worry about. 

Fits under the track along the slot in the track and is activated as the slot car guide passes through it. 

This has a 5mm gap better suited to routed wood tracks than the plastic.
(For plastic tracks the 8mm version is recommended)

This slotted, optically coupled, Infrared transistor is ideal for a slot car lap counting and timing systems where no ambient or gantry lights are available. Conditions such as night racing are an example. 

• Used with the Track Sensor Interface
• Slot gap is 5mm
• Device height is 9.5mm
• No light is needed since it has an integral transmitter and receiver co-axially aligned in the device
• U shaped slotted Sensor to mount under the track in line with the track slot for each lane
• No alignment needed since the device is moulded to maintain exact transmitter and receiver co-axis
• The U shape is 5mm wide so won't snag any slot cars and gives a reliable switching action each time a slot car guide breaks the beam between the transmitter and receiver in either side of the slotted device.