Intermatic - IOS-CMP-DT-LV - Commercial Grade Low-Voltage Ceiling Mount Occupancy Sensor, White Square Flat Drainage Grate Exposed surface diameter: 2¼ "

Exposed  surface diameter: 2¼ " (5

the first is for 1/4 inch tubing and the other is for 1/2 to 3/4 inch tubing

Watering flexibility with a selection of watering frequencies including weekly

filtration

Intermatic - IOS-CMP-DT-LV - Commercial Grade Low-Voltage Ceiling Mount Occupancy Sensor, White Square Flat Drainage Grate Exposed surface diameter: 2¼ "Spec Sheet Install Manual Intermatic IOS CMP DT LV Commercial Grade Low Voltage Ceiling Mount Dual Tech Occupancy Vacancy Sensor, White The IOS CMP DT LV 360 Dual Technology Low Voltage Occupancy Sensors control the load based on occupancy and ambient light levels. It combines passive infrared (PIR) and ultrasonic technologies to help avoid false triggering while increasing presence detection. Selectable modes allow the sensor to turn load ON and hold