They report an opening, which is earlier than reporting a presence · review
ABUS FUMK45000 review
The opening detector for ABUS's Smartvest Pro alarm. It reports unauthorized opening of doors, windows and patio doors, and triggers whatever scenarios have been configured on the panel.
The conclusion A component of a system rather than a device. Right if you own a Smartvest Pro, pointless otherwise.
This sensor is priced as part of a system rather than as a contact,
and the difference is not in the switch or the magnet.
What you are paying for
Supervision. The Smartvest Pro panel knows this sensor exists. It notices when
the sensor stops reporting — a dead battery, a removed sensor, a jammed radio
— rather than treating silence as normal. Standalone contacts cannot do this,
and silence is precisely the state an intruder is trying to produce.
Scenarios rather than a noise
A standalone alarm has one response. A sensor inside a system can sound a
siren, notify a phone, switch a light and start a camera recording, and can do
different things at different times of day. That flexibility is what a panel
is for.
The obvious limit
Smartvest Pro and nothing else. Alarm sensors are proprietary, and this one is
useless with any other hub. That makes the system choice the important decision
and this purchase a consequence of it.
What is not published
Gap tolerance. On windows closing onto a deep recess it is the specification
that decides whether the sensor works, and the manual rather than the listing
is where to find it.
Who it suits
An ABUS Smartvest Pro owner adding an opening.
Availability
Not found on the American Amazon store, where the buy link falls back to a local search rather than to a page that does not exist.
Prices and availability are what Keepa reported on the date this page was updated; both move.
What reassures, and what does not
Strengths
Part of a proper alarm system rather than a standalone noise
Triggers configured scenarios, not only the siren
From a manufacturer whose main business is physical security
Designed for windows, front doors and patio doors alike
Compromises
Smartvest Pro only — it does nothing with any other system
Only worth its price inside a Smartvest Pro system
No gap tolerance published on the listing
Sensors from established alarm makers cost several times generic ones
Specifications
Type
Wireless opening detector
System
ABUS Smartvest Pro
Function
Detects and reports unauthorized opening
Scenarios
Triggers configured actions on the panel
Applications
Windows, front doors, patio doors
Amazon reference
B0DW4CFDDH
EAN
4003318419089
The questions we are asked
Why does it cost several times a generic sensor?
Because it is part of a supervised system. The panel knows this sensor exists, notices when it stops reporting, and can act on it in ways a standalone alarm cannot. You are buying membership of a system rather than a switch and a magnet.
What are "scenarios"?
Actions configured on the panel: sound the siren, notify a phone, switch a light, start a camera recording. A contact that only makes a noise is limited to one response; one inside a system can produce several, and different ones by time of day.
What gap does it tolerate?
Not published on this listing. Where a manufacturer does not state a figure, this page does not supply one — the manual is where to check, and it matters most on windows that close onto a deep recess.
Our score
8.7/ 10
A component of a system rather than a device. Right if you own a Smartvest Pro, pointless otherwise.
What this one costs among door and window sensors
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom. Listed is not the same as in stock — availability changes daily.
Details checked on September 2, 2026.
The buyer this one serves, among security devices
An ABUS Smartvest Pro system being extended door by door.
Sources
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
90 dB standalone siren · 3.54 × 1.18 × 0.79 in and about 0.08 lb, both published · 2 AAA, NOT included · a three-step install written out · five units for ten dollars · no gap figure, no battery life, no tamper detection
Five alarms for ten dollars with their dimensions and weight published — two figures the cheapest sirens here usually leave out.
Best for: Five openings on a tight budget, where the body has to be measured against a shallow frame first
120 dB alarm or chime, switched on the side: OFF / chime / alarm · 4 LR44 cells SUPPLIED · a battery TEST BUTTON and a low-battery LED, the only test button on this shelf · double-sided tape included · no gap figure, no battery life, no tamper detection
The only sensor here with a button that tells you the battery is still good — which on an alarm nobody checks is worth more than it sounds.
Best for: A household that wants a chime for the back door in the day and an alarm on it at night
NO BASE STATION REQUIRED — connects over Amazon Sidewalk, the only named network on this shelf · six sensors · 24/7 professional monitoring on a subscription · no battery type, no battery life, no gap figure, no tamper detection
The only sensor on this shelf that needs no hub at all — and the only one that names the network it talks to.
Best for: A house with no alarm system that wants phone alerts on six openings and nothing else to buy
