Mallory Sonalert SNP428 Continuous Tone Panel-Mount Buzzer/Alarm The Mallory Sonalert SNP428 is a reliable and efficient panel-mount buzzer designed to deliver continuous audible alerts in various applications. Its compact design and robust construction make it suitable for industrial environments where dependable signaling is essential. Key Features Continuous Tone Operation: Provides a steady, uninterrupted sound for clear and consistent alerts. Wide Voltage Range: Operates effectively between 4VDC and 28VDC, offering flexibility across different systems. Sound Output: Delivers a sound pressure level of 76 dBA at 2 feet when powered at 28VDC, ensuring audibility in noisy environments. Resonant Frequency: Functions at a frequency of 2.9 kHz, optimized for human ear sensitivity. Low Power Consumption: Draws a maximum of 16 mA at 28VDC, promoting energy efficiency. Durable Housing: Constructed with black 6/6 nylon, providing resilience against mechanical impacts and environmental factors. Panel Mount Design: Features a threaded front suitable for standard 30mm (1.181″) panel holes, facilitating straightforward installation. Technical Specifications Operating Voltage: 4VDC to 28VDC Sound Pressure Level: 76 dBA at 2 feet (28VDC) Resonant Frequency: 2.9 kHz Current Consumption: 3 mA at 4VDC; 16 mA at 28VDC Operating Temperature Range: -30°C to +65°C Storage Temperature Range: -40°C to +85°C Housing Material: 6/6 Nylon, Black Mounting Hole Size: 1.25″ (31.75mm); fits standard 30mm (1.181″) hole Weight: Approximately 0.5 oz (17g) Applications The SNP428 is ideal for use in: Industrial control panels Alarm systems Medical devices Security systems Instrumentation equipment Its consistent performance and ease of installation make the Mallory Sonalert SNP428 a preferred choice for professionals seeking a dependable audible signaling device.