RBS Motion & Optical Tilt Sensors OncQue RBS Sensors include motion sensors and optical tilt sensors with surface mount options. OncQue RBS31, RBS35, and RBS38 10mA, 3.3VDC to 5VDC optical tilt sensors with operating angles of 15° to 65°. RBS02, RBS07, and RBS20 are 10mA, 5VDC contact ball sensors with 20° or 45° operating angles.