{"product_id":"system-sensor-hcwl-lf-l-series-low-frequency-ceiling-sounder-white","title":"System Sensor HCWL-LF L-Series Low-Frequency Ceiling Sounder, White","description":"\u003ch2\u003eSystem Sensor HCWL-LF Low-Frequency Ceiling Sounder\u003c\/h2\u003e\n\n\u003cp\u003eThe System Sensor HCWL-LF Low-Frequency Ceiling Sounder is a white indoor fire notification appliance that produces a 520 Hz ± 10% square-wave tone. Designed for ceiling installation and sleeping-space notification, it operates from a nominal 24 V power source across a specified 16 to 33 V operating range.\u003c\/p\u003e\n\n\u003cp\u003eThis L-Series audible appliance supports Temporal 3, Temporal 4, continuous, and coded signaling, giving installers multiple operating choices for fire and emergency notification systems. High and low volume selections help balance audible output with notification appliance circuit current requirements. Its round ceiling format fits applications such as hotels, apartments, dormitories, healthcare facilities, and other occupancies requiring low-frequency notification.\u003c\/p\u003e\n\n\u003cp\u003eThe HCWL-LF uses plug-in construction and a mounting plate with an onboard shorting spring, allowing technicians to verify wiring continuity before installing the sounder. It accepts 12 to 18 AWG field wiring and is electrically compatible with legacy SpectrAlert and SpectrAlert Advance appliances. Agency approvals include UL, FM, and CSFM listings for professional fire-protective installations.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e520 Hz Low-Frequency Tone:\u003c\/strong\u003e Generates a 520 Hz ± 10% square-wave signal for low-frequency notification applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeiling-Mount Configuration:\u003c\/strong\u003e Uses a round housing designed specifically for indoor ceiling installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Tone Patterns:\u003c\/strong\u003e Supports Temporal 3, Temporal 4, continuous, and coded signaling modes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh and Low Volume:\u003c\/strong\u003e Lets installers select the appropriate audible level while managing circuit current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-In Construction:\u003c\/strong\u003e Reduces intrusion into the electrical back box for easier installation and servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Continuity Check:\u003c\/strong\u003e The mounting plate incorporates a shorting spring for testing field wiring before device installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Compatibility:\u003c\/strong\u003e Electrically compatible with SpectrAlert and SpectrAlert Advance notification appliances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e System Sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e HCWL-LF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e L-Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Low-Frequency Sounder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Type:\u003c\/strong\u003e Audible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFace Marking:\u003c\/strong\u003e None\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Indoor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Ceiling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e Wired, 2-wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 520 Hz ± 10%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaveform:\u003c\/strong\u003e Square wave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTone Settings:\u003c\/strong\u003e Temporal 3, Temporal 4, continuous, coded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume Settings:\u003c\/strong\u003e High and low\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Reverberant Sound Output, High:\u003c\/strong\u003e 80 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Reverberant Sound Output, Low:\u003c\/strong\u003e 76 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eULC Anechoic Sound Output, High:\u003c\/strong\u003e 82 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eULC Anechoic Sound Output, Low:\u003c\/strong\u003e 78 dBA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 3 High Current Draw:\u003c\/strong\u003e 108 mA DC, 150 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 3 Low Current Draw:\u003c\/strong\u003e 78 mA DC, 76 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 4 High Current Draw:\u003c\/strong\u003e 111 mA DC, 151 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 4 Low Current Draw:\u003c\/strong\u003e 80 mA DC, 76 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous High Current Draw:\u003c\/strong\u003e 111 mA DC, 151 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Low Current Draw:\u003c\/strong\u003e 80 mA DC, 76 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoded High Current Draw:\u003c\/strong\u003e 111 mA DC, 151 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoded Low Current Draw:\u003c\/strong\u003e 80 mA DC, 76 mA FWR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e Regulated 24 V DC or full-wave rectified (FWR)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage Range:\u003c\/strong\u003e 16 to 33 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMDL3 Sync Module Operating Range:\u003c\/strong\u003e 16.5 to 33 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Terminal Wire Gauge:\u003c\/strong\u003e 12 to 18 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 32°F to 120°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity Range:\u003c\/strong\u003e 10% to 93% non-condensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.8\" diameter x 1.4\" high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Surface-Mount Back Box:\u003c\/strong\u003e SBBCWL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions with SBBCWL:\u003c\/strong\u003e 6.9\" diameter x 3.9\" high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Compatibility:\u003c\/strong\u003e Legacy SpectrAlert and SpectrAlert Advance devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynchronization Compatibility:\u003c\/strong\u003e System Sensor MDL3 SyncCircuit module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Listing:\u003c\/strong\u003e UL 464, S4011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFM Approval:\u003c\/strong\u003e PR452768\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCSFM:\u003c\/strong\u003e 7135-1653:0516\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":46717491347653,"sku":"SYS-HCWLLF","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/3085\/3829\/files\/1-system-sensor-hcwl-lf_56d9b0d2-9246-4730-bf9d-0bbe4d610c79.jpg?v=1786575354","url":"https:\/\/avlgear.com\/products\/system-sensor-hcwl-lf-l-series-low-frequency-ceiling-sounder-white","provider":"AVLGEAR","version":"1.0","type":"link"}