Products

The MEIDI 9*5.5mm Magnetic Passive Buzzer series offers a range of impedance and frequency specifications. QMB-09B-03 (16Ω, 3V, 2.7kHz) for 3.3V logic direct drive; QMB-09B-05 (42Ω, 5V, 2.7kHz) for 5V industrial buses; QMB-09B-05 4KHZ (42Ω, 5V, 4.0kHz) for high-frequency tonal clarity. All variants share identical 9.0 mm footprint and black PBT housing, enabling single PCB layout across multiple voltage architectures. Request evaluation samples or submit an RFQ today. Volume pricing and custom lead forming available.

The MEIDI 4218 Piezo Alarm Buzzer is a high-output electronic siren built for safety-critical applications that demand clear, long-range hazard alerts. Designed for noisy industrial settings rather than simple status indication, it delivers penetrating sound pressure to warn personnel across wide areas. Its 2800 Hz tone aligns with peak human auditory sensitivity. The rugged ABS housing resists impact and temperature swings, and through-hole mounting secures easily to control panels and machinery enclosures. Running on 3–24 VDC, it works with both mains-powered fire panels and battery-backed security systems, making it practical for supply to industrial and safety projects. A reliable choice for bulk orders in facility safety upgrades, contact MEIDI for specifications and pricing.

MEIDI 4216 Active Piezo Alarm Buzzer — 41.8 × 16 mm plug-in electronic alarm, nominal voltage 12VDC, operating voltage range 3–24V. The built-in oscillator generates a fixed-tone alarm at 2800–2950 Hz with ≤8 mA current, requiring no external drive circuitry. Sample-proven, the 41.8 mm piezoelectric diaphragm delivers a sound pressure level of 101–107 dB, suitable for industrial hazard alarm panels, fire alarm networks, security systems, and heavy equipment proximity alarms. The threaded ABS housing allows for panel mounting in high-vibration environments. For sample evaluation, bulk quotes, and custom tone configurations, please submit an inquiry.

MEIDI 12.5mm Piezo Ceramic Buzzer Element pairs a 12.5 mm piezoelectric ceramic disc with a brass substrate, resonating at 7.8 kHz with 12000 pF capacitance and ≤300 Ω equivalent resistance. Compared with the 11.0 mm FT-11T series, the wider 12.5 mm diameter adds 29% more active surface area. This translates directly to higher sound pressure and improved low-frequency performance using the same drive circuitry. A tighter ±10.3% frequency tolerance and 40% lower equivalent resistance ensure consistent acoustic output across multi-unit installations — ideal for premium consumer, medical, and industrial sensor applications. Ask for evaluation samples with per-unit impedance and frequency test reports, or send an RFQ for volume pricing and custom electrode configurations.

MEIDI 11mm Brass Piezo Ceramic Element features an 11.0 mm piezoelectric ceramic disc mounted on a brass substrate, with a 9.0 kHz resonant frequency and 12000 pF capacitance. As the higher-frequency counterpart to the FT-11T-7.8A1, it shares the same 0.18 mm thickness and 11 mm diameter. This means designers can swap the two directly for acoustic A/B testing without any mechanical changes. The 8.0 mm active electrode diameter is tuned for strong electromechanical coupling at the higher resonance point. Well-suited for smart wearables, portable medical devices, and compact IoT sensor nodes that need sharp, clear tonal alerts. Evaluation samples come with individual frequency and capacitance readings, and RFQs are welcome for volume pricing or custom electrode layouts.

MEIDI 11mm Piezo Ceramic Buzzer Element combines an 11.0 × 0.18 mm piezoelectric ceramic disc with a brass backing, resonating at 7.8 kHz and carrying 12000 pF capacitance. At under 0.2 mm thick, it slides easily into ultra-slim acoustic modules for smart wearables, portable medical gear, and IoT sensor enclosures. The brass substrate delivers thermal stability and solder-friendly surfaces, whether mounted via direct PCB bonding or spring-contact retention. With an equivalent resistance of ≤500 Ω, it pairs efficiently with LC resonant drive designs. Ask for evaluation samples including per-unit frequency and capacitance test results, or send an RFQ for volume pricing and custom electrode options.