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Two small black cylindrical buzzers with two wires each

Unique-Bargains

Unique-Bargains SFM-27 DC 3-24V 90DB Intermittent Beep Alarm Buzzer 2pcs control sensor

SKU CH-KB2Y-PNMYX

DC 3-24V intermittent beep buzzer at 90 dB, 30 mm diameter, two pieces

  • Loud 90 dB alert cuts through noisy environments
  • DC 3-24 V range suits many power supplies
  • Intermittent beep pattern grabs attention immediately
  • Compact 30 x 15 mm body fits tight panels
  • Two-piece pack provides spare or dual-location install

Ideal for industrial alerting

The Unique-Bargains SFM-27 is a DC 3-24V intermittent beep alarm buzzer supplied as a two-piece set. Rated at 90DB with a 3000+/-500 Hz resonant frequency, it suits machinery, ovens and electric cabinets needing audible warnings. Its ABS housing withstands -20 to +60 Celsius operating temperatures. Two-wire connection simplifies installation for control-sensor applications.

Check voltage and mounting before ordering

Verify your system supplies between 3 and 24 volts DC and can deliver the 30mA rated current. Confirm the 30mm diameter and 15mm height fit the enclosure, noting the 1.2 inch by .6 inch overall size. Ensure a mounting hole matches the unit's pattern and that wiring reaches the two terminals. The intermittent tone is fixed, so confirm this pattern meets the alert requirement.

Steady output during continuous duty

The buzzer maintains its 90DB intermittent beep across the full 3-24V range without thermal derating up to 60 Celsius. Current draw stays at 30mA, so power-supply loading remains predictable during extended alarm events. ABS construction resists vibration in industrial cabinets, and the fixed resonant frequency prevents drift during prolonged operation. No duty-cycle limit is specified by the manufacturer.

How it compares

Measured against everything we stock in Sensors, Buzzers & Control Modules, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 97% of the 89 comparable items (median $29.99).

Specifications

No published specifications for this item yet.

Questions about this item

Does the package include mounting hardware or a power supply, or do I need to source those separately?

The box contains two SFM-27 buzzers with two-wire leads; mounting hardware and a DC power supply are not included.

Should I select a specific voltage version of the SFM-27, or does one model cover the whole 3-24V range?

A single model operates across the full DC 3-24V range, so no separate voltage version needs to be chosen.

How loud is the 90 dB intermittent beep when the buzzer is mounted inside a standard electrical cabinet?

At the rated 90 dB the intermittent beep is clearly audible in typical industrial cabinets and machinery enclosures.

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