Product Information:The Gentex 8100 Series of photoelectric detectors is designed for commercial, industrial, residential and institutional applications. The 8100 is engineered to provide outstanding performance wherever reliable fire protection is required and provides an exclusive patented three position test feature that simulates a 0.85 and a 3.5 actual smoke condition, in full compliance with NFPA 72 and UL 268 Standards. The test feature has the capability to let you know when maintenance is required.A standard Form A dry relay contact for connection to the system initiating circuit and an auxiliary Form C dry relay contact is provided on all models for use for remote annunciation as a releasing device services. Other options include reverse/local 90dBA solidstate piezo horns and 135F fixed temperature selfrestoring integral or isolated thermals to meet your specific requirements.Part Number: 9081233002 Features:#149; Horn Frequency 3100 Hz (Nominal)#149; Nominal 2.5 Sensitivity#149; Functional Test Switch Patented Three Position Test#149; On Site Maintenance Washing Program#149; Form A/Form C Dry Relay Contacts#149; QuickDisconnect Wiring Harness#149; 2 Year Warranty from Date of Purchase#149; 5to1 SignaltoNoise Ratio#149; Pulsing LED Sensing Chamber#149; Fully Insect Screened#149; SolidState LED Condition Indicator#149; Mounting Hardware Adapts to Standard Junction Boxes#149; Dust Cover to Prevent Contamination During Installation#149; Protective High Air Velocity Gasket#149; Suitable for release device service Specifications:#149; Voltage: 120V#149; Range: Min (110 VAC) / Max (130 VAC)#149; Frequency: 60 Hz#149; Sensitivity: 2.5 Nominal#149; Temperature: 40100F. (4.4C38C)#149; Humidity: 1093 Relative Humidity#149; Size: Diameter: 6 1/2 OD (5 3/4 in. at ceiling)#149; Depth: 2 5/8 in.