M-E MODERN-ELECTRONICS BELL-221 PIR Motion Sensor Door Chime with 90 dB Alarm, White

Place the BELL-221 at your shop entrance, office door, or private hallway, and it announces every visitor with a clear ding-dong chime or a loud 90 dB alarm. The passive infrared sensor detects movement within a 6-meter range and 110° angle, making it suitable for indoor entry monitoring.

Key specifications

• Detection technology: Passive Infrared (PIR) motion sensor
• Alarm volume: 90 dB, adjustable
• Operating modes: Alarm, Chime, Off
• Detection range: up to 6 m
• Detection angle: 110°
• Power source: 3x 1.5V AA batteries (not included) or 6V DC adapter (not included)
• Mounting: wall-mountable or freestanding
• Chime sound: Ding-Dong
• Low battery indicator: yes
• Alarm duration: approx. 30 seconds
• Housing material: plastic
• Colour: white

Why choose it

You can switch between a friendly chime for customer greetings and a piercing alarm for after-hours security. The adjustable volume lets you set the right level for quiet offices or busy workshops. Installation is flexible: hang it on the wall with the included screws and dowels, or simply place it on a shelf or counter.

Ideal use cases

• Retail shops and boutiques to announce entering customers
• Offices and reception areas for visitor notification
• Private homes, hallways, or garages as a motion alert
• Small warehouses or stockrooms for access monitoring

Good to know

The sensor runs on three standard AA batteries, so no wiring is needed. A low battery indicator reminds you when it is time to replace them. For permanent operation, connect a 6V DC power adapter (sold separately).