The MEIDI HND-4333M Electronic Alarm with 95dB Sound Output is a high-voltage electronic alarm designed for audible warning applications requiring AC or DC drive at elevated voltage levels. Rated at 110VDC/VAC with a 60~150VDC/VAC operating range, this alarm integrates into mains-connected warning circuits and high-voltage industrial control systems without additional voltage regulation.
The HND-4333M produces Min. 95dB sound pressure at 110VDC/VAC, 10cm, with a resonant frequency of 2800±500Hz. The source specification lists the frequency parameter with an Intermittent notation and the tone type as Continuous. The black ABS housing provides a Φ43.0mm diameter form factor at approximately 36g net weight. Operating temperature spans -20℃~+70℃, with storage rated to -30℃~+80℃.
High-voltage AC/DC drive — rated 110VDC/VAC with 60~150VDC/VAC operating range for direct connection to high-voltage supply circuits
95dB sound pressure output — Min. 95dB at 110VDC/VAC, 10cm for audible alert in industrial environments
2800Hz resonant frequency — factory-tuned at 2800±500Hz with Continuous tone output
Black ABS housing — Φ43.0mm diameter construction, approximately 36g net weight
Wide temperature range — -20℃~+70℃ operating, -30℃~+80℃ storage
| Parameter | Value | Notes |
| Product Type | Electronic Alarm | — |
| Rated Voltage | 110 VDC/VAC | Nominal |
| Operating Voltage | 60~150 VDC/VAC | Continuous range |
| Rated Current | Max. 20 mA | At 110VDC/VAC |
| Sound Pressure Level | Min. 95 dB | At 110VDC/VAC, 10cm |
| Resonant Frequency | 2800 ±500 Hz | Intermittent notation per spec |
| Tone | Continuous | Per spec |
| Operating Temperature | -20℃ ~ +70℃ | Continuous |
| Storage Temperature | -30℃ ~ +80℃ | Non-operating |
| Housing Material | ABS | Black |
| Diameter | Φ43.0 mm | Per dimension drawing |
| Net Weight | Approx 36 g | — |
High-voltage alarm circuits — systems with 110V AC/DC supply for direct-drive audible warning
Industrial control panels — fault and status alarms in mains-connected equipment
Fire and safety notification — audible alert units in building safety installations with 110V supply
Process hazard warning — equipment overload and fault notification in industrial environments
General electronic warning systems — applications requiring high-voltage drive and 95dB sound output
| Design Requirement | HND-4333M Advantage |
| High-voltage drive | 110VDC/VAC rated, 60~150VDC/VAC operating range for direct mains connection |
| Audible output | Min. 95dB at 110VDC/VAC, 10cm |
| Supply flexibility | Accepts both AC and DC voltage within operating range |
| Compact form factor | Φ43.0mm ABS housing at approximately 36g |
| Temperature endurance | -20℃~+70℃ operating range for industrial environments |
MEIDI manufactures the HND-4333M Electronic Alarm with 95dB Sound Output under controlled production processes. Each production lot undergoes:
Frequency verification — resonant frequency test at 2800±500Hz
SPL verification — sound pressure verification at 110VDC/VAC, 10cm
Current consumption test — Max. 20mA check at 110VDC/VAC
Reliability testing — including 96-hour life test at rated voltage with 1/2 duty cycle square wave, +80℃ high-temperature storage (96h), -40℃ low-temperature storage (96h), 48-hour humidity exposure at +40℃/90~95%RH, 10-cycle temperature shock (+70℃↔-20℃), 1.2m drop test, and mechanical vibration test (1000 times/min, 1.5mm amplitude, 3 axes)
Products are manufactured with RoHS-compliant materials. Contact MEIDI for detailed quality documentation and test reports.
1. What does "Intermittent" mean in the frequency specification, and how does it relate to the "Continuous" tone?
The source specification lists the resonant frequency as "2800±500Hz/Intermittent" and the tone type as "Continuous." The Intermittent notation appears in the frequency parameter field, while the tone is specified as Continuous. Contact MEIDI for clarification on the duty cycle and tone pattern relationship for your application.
2. Can the HND-4333M be driven by both AC and DC voltage?
Yes. The rated voltage is specified as 110VDC/VAC, and the operating voltage range is 60~150VDC/VAC. The alarm accepts both AC and DC input within this range. Verify that your supply voltage falls within the specified operating range.
3. What is the sound pressure level measurement distance and condition?
The source specification states Min. 95dB at 110VDC/VAC, 10cm. The measurement is taken at 10cm distance under rated voltage. Use this measurement condition when comparing acoustic output with other alarm units.
4. What housing material and dimensions does the HND-4333M use?
The HND-4333M uses a black ABS housing with Φ43.0mm diameter and approximately 36g net weight. Contact MEIDI for the official dimension drawing showing complete mechanical dimensions and mounting details.
For technical datasheets, acoustic specification data, or OEM configuration discussion, contact MEIDI. Product specifications and qualification documentation are available under mutual NDA.
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No.6, Wenlin Road, Chenbao Town, Xinghua City, Jiangsu Province, China
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