
Standalone Door Sensor
In stock
- Genuine stock. Sourced from authorised distributors, warranty intact.
- Delivered across Tanzania with additional delivery charges.
- Multiple payment options.
Payment Options
- Cash on Delivery. You can pay cash at our store on pickup, or pay the rider upon delivery (Dar es Salaam only).
- Pay by Lipa Number
- M-Pesa
- Mixx by Yas
- Airtel Money
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- Selcom

- M-Pesa
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- Visa
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- UnionPay
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- Pay by Apple Pay or Google Pay
- Apple Pay
- Google Pay
- Apple Pay
About this product
Standalone Door and Window Security
The SECRUI D12 is a standalone two-part magnetic contact alarm designed to monitor entry points without requiring internet connectivity, smart home hubs, or mobile applications. When the magnetic contact separates from the main sensor body upon opening a door or window, the unit sounds an alert directly at the threshold.
Four Selectable Operating Modes
Controlled via a SET button on the device, the sensor features four alert settings. Mode 1 sounds an intruder alarm for one minute when triggered. Mode 2 functions as a doorbell chime, sounding a single ding-dong tone when opened. Mode 3 triggers an immediate alarm that silences as soon as the door or window is shut. Mode 4 acts as an open reminder, emitting a repeating chime until the opening is fully closed.
Power and Installation Requirements
The unit requires two AAA batteries to operate, which are not included and must be supplied separately. Operating independently of mains power, the sensor remains functional during electrical outages. Installation requires no drilling or wiring; the sensor and magnet attach to door frames, window casings, cupboards, or containers using self-adhesive pads.
Description supplied by the manufacturer.
Specifications
| Brand | SECRUI |
|---|---|
| Model | D12 |
| Alarm Volume | 120 dB |
| Operating Modes | 4 modes (Intruder alarm, Doorbell chime, Immediate alarm and stop, Door open reminder) |
| Power Source | 2 x AAA batteries (not included) |
| Mounting Type | Self-adhesive pads |
| Dimensions | 3 x 1.5 x 10 cmRetailer listing figure from Bigamart |
| Weight | 0.11 kgRetailer listing figure from Bigamart |
| Connectivity | Standalone (No Wi-Fi, app, or hub required) |
| Product code | 2250 |
| Category | Smart Security |
| Availability | In stock in Dar es Salaam |
What’s in the box
Not yet defined.
We are still collecting box contents from the manufacturers. Ask us on WhatsApp and we will open one on the shelf and tell you exactly what is inside.
Questions
How loud is the alarm?
The SECRUI D12 emits an alarm of up to 120 dB when the magnetic contact separates from the main sensor.
What are the four operating modes?
Mode 1 sounds an intruder alarm for one minute. Mode 2 sounds a ding-dong doorbell chime. Mode 3 triggers a siren that stops as soon as the door is closed. Mode 4 emits a repeating reminder chime until the door is closed.
What batteries does the sensor require?
The unit is powered by two AAA batteries. Batteries are not included with the unit and must be purchased separately.
Does this alarm connect to Wi-Fi or phone apps?
No. It operates as a fully standalone sensor without Wi-Fi, smart hubs, or smartphone app support.
How is the sensor mounted?
It attaches to doors, windows, and frames using self-adhesive pads without the need for screws or drilling.
Anything else? Ask us on WhatsApp and we will tell you straight.




