Features: The 45Uv5 Scanner Detects the Presence of Flames Which Emit Ultraviolet Radiation (UV) Typical Fossil Fuels Which Emit UV Include Natural Gas, Coke Oven Gas, Propane, Methane, Kerosene, Light Petroleum Distillates and Diesel Fuels These Scanners Incorporate a Built-In Self-Checking Mechanism to Protect Against UV Tube Malfunctions The Scanners are Available with Explosion Proof Housings The 45Uv5 Scanners Use a Uv-Eye Detector This Detector is a Sealed, Gas Filled, Uv-Sensitive Tube Containing Two Electrodes Connected to a Source of AC Voltage When UV Radiation of Sufficient Energy Falls Upon the Electrodes, Electrons are Released and the Inter-Electrode Gas Becomes Conductive, Resulting in an Electric Current Flow from One Electrode to the Other The Current Flow Starts and Ends Abruptly and is Known as an "Avalanche" Specifications: Manufacturer: Fireye Manufacturer Part Number: 45UV5-1000 Product Type: Ultraviolet Flame Scanner Wavelength: 180 to 250 Nm Frequency Rating: 60 Hz Power Rating: 4 VA Mounting Size: 1" Female Threaded Connection Type: 1/2" to 14" NPSM Tapping Material: Die-Cast Aluminum Temperature Rating: -40 to 200 Degrees F Dimensions: 10.15" x 6.95" x 6.5" Weight: 3.9 lb.