<big>Sensors</big>

<b>Light Sensor</b>
Use: <mono>send_to(links.light_sensor, { operation = ">=", light_level = 14 })</mono>
Valid values for the "operation" field: ">", ">=", "<", "<=", "="

<b>Node Sensor</b>
Use: <mono>send_to(links.node_sensor, "air")</mono>

<b>Item Sensor</b>
Use: <mono>send_to(links.item_sensor, {item = "sbz_resources:matter_blob 99", direction = "Up" })</mono>
Where item is any ItemStack in any form
Where valid values for direction are those you see in the dropdown

<b>Delayer</b> (technically not a sensor but still included)
Use: <mono>send_to(links.delayer, delay)</mono>, where <mono>delay</mono> is a number.
It will set the delay of the delayer.