Intermatic - IOS-DPBV-WH - Residential In-Wall PIR Vacancy Sensor, White VCMA-20UL the 3500's arc adjustment is

the 3500's arc adjustment is quick and easy

3/4" MNPT or 3/4" Hose Thread

Specifications:

Rain Curtain Nozzles - Slip clutch mechanism for quick adjustment on installation

60 Hz Includes Wall Plate Yes Inductive 1000 VA

Intermatic - IOS-DPBV-WH - Residential In-Wall PIR Vacancy Sensor, White VCMA-20UL the 3500's arc adjustment isSpec Sheet Install Manual The passive infrared sensors work by detecting the difference between heat emitted from the human body in motion and the background space. The sensor switch can turn a load ON and hold it as long as the sensor detects occupancy. After no motion is detected for the set time delay, the load turns OFF automatically. The sensor switch has one relay (equal to single pole switch), it also includes Ambient Light Level Sensor.