{"product_id":"system-sensor-hgrl2-lf-compact-low-frequency-wall-sounder-red","title":"System Sensor HGRL2-LF Compact Low-Frequency Wall Sounder, Red","description":"\u003ch2\u003eSystem Sensor HGRL2-LF Compact Low-Frequency Wall Sounder\u003c\/h2\u003e\n\n\u003cp\u003eThe System Sensor HGRL2-LF Compact Low-Frequency Wall Sounder is a red, second-generation L-Series notification appliance for fire alarm systems in sleeping-space applications. It generates a 520 Hz ± 10% square-wave signal, operates from regulated 24 VDC, and provides selectable Temporal 3, Temporal 4, continuous, and coded patterns with high or low output.\u003c\/p\u003e\n\n\u003cp\u003eIts compact housing suits hotels, apartments, dormitories, healthcare facilities, and other projects needing a compact 520 Hz fire alarm sounder. Measuring approximately 5.3\" x 3.5\" x 1.6\", it supports single-gang installation and includes diagnostic voltage test points for faster end-of-line troubleshooting without removing the appliance.\u003c\/p\u003e\n\n\u003cp\u003eThe plug-in mounting system incorporates a shorting spring so installers can check field wiring before attaching the device. It operates across 16 to 33 VDC and maintains electrical compatibility with earlier SpectrAlert, SpectrAlert Advance, and L-Series notification products. UL, ULC, FM, and CSFM approvals support use in professionally designed fire notification systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e520 Hz Low-Frequency Signal:\u003c\/strong\u003e Produces a 520 Hz ± 10% square-wave tone for sleeping-area notification applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Red Housing:\u003c\/strong\u003e Provides a smaller wall-mount footprint for installations where available wall space is limited.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Audible Patterns:\u003c\/strong\u003e Offers Temporal 3, Temporal 4, continuous, and coded operating modes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh and Low Output:\u003c\/strong\u003e Lets installers select between two audible levels according to system requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDVM Diagnostic Test Points:\u003c\/strong\u003e Provides access for digital voltage measurements without removing the sounder from its mounting position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-In Installation:\u003c\/strong\u003e Uses a mounting plate with an onboard shorting spring for wiring continuity checks before final installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackward Electrical Compatibility:\u003c\/strong\u003e Integrates with legacy SpectrAlert, SpectrAlert Advance, and L-Series devices within the specified voltage range.\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 HGRL2-LF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e L-Series Second Generation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Compact Low-Frequency Sounder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Red\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Indoor fire notification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Compact wall mount\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\u003eSound Patterns:\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\u003eTemporal 3 High:\u003c\/strong\u003e 79 mA current draw, 80 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 3 Low:\u003c\/strong\u003e 79 mA current draw, 76 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 4 High:\u003c\/strong\u003e 79 mA current draw, 80 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemporal 4 Low:\u003c\/strong\u003e 78 mA current draw, 76 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous High:\u003c\/strong\u003e 82 mA current draw, 80 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Low:\u003c\/strong\u003e 78 mA current draw, 76 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoded High:\u003c\/strong\u003e 82 mA current draw, 80 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoded Low:\u003c\/strong\u003e 79 mA current draw, 76 dBA reverberant sound output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e Regulated 24 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage Range:\u003c\/strong\u003e 16 to 33 VDC, 24 V nominal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage with MDL Sync Module:\u003c\/strong\u003e 16.5 to 33 VDC, 24 V nominal\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 5.3\" L x 3.5\" W x 1.6\" D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJunction Box:\u003c\/strong\u003e Single gang\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Surface-Mount Back Box:\u003c\/strong\u003e SBBGRL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiagnostic Feature:\u003c\/strong\u003e Digital voltage meter test points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Compatibility:\u003c\/strong\u003e SpectrAlert, SpectrAlert Advance, and L-Series devices at 16 to 33 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynchronization:\u003c\/strong\u003e Approved power supplies supporting System Sensor Sync or System Sensor MDL Sync Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Listing:\u003c\/strong\u003e S4011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eULC:\u003c\/strong\u003e Listed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFM Approval:\u003c\/strong\u003e PR472993\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":46717491380421,"sku":"SYS-HGRL2LF","price":74.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/3085\/3829\/files\/1-system-sensor-hgrl2-lf_3954be32-060e-4fbb-90fb-38e89623ca6d.jpg?v=1786575359","url":"https:\/\/avlgear.com\/products\/system-sensor-hgrl2-lf-compact-low-frequency-wall-sounder-red","provider":"AVLGEAR","version":"1.0","type":"link"}