Infra-red transmitter for photocell : 100 mW / 500 mW   

Wireless receiver 100 mW - HL3-RX HL3-1 power supply not included   

500mW Wireless Photocell - HL3-500 HL3-1 power supply not included   

Essential device to secure and isolate your lines in timekeeping. Meets FIS standards We recommend the use of optocoupled impulse distributors for the following reasons : Controls false triggering due to electronic interference on your timing connection wires Completely isolates your timing electronics to ensure that systems operating in parallel (back up) are not linked in any way to each other

The HL615-2 pulse receiver works directly with HL615 transmitter and new photocells HL3-131 | HL3-132 | HL3-135.

Essential device to secure and isolate your lines in timekeeping. We recommend the use of optocoupled impulse distributors for the following reasons : Controls false triggering due to electronic interference on your timing connection wires Completely isolates your timing electronics to ensure that systems operating in parallel (back up) are not linked in any way to each other