Wired Smoke Detector with Sound and Light Alarm, 40 m²
In a hotel corridor or an office block, detectors usually hang on a wired loop rather than standing alone. This one is wired for networking, runs on DC 9 to 28 V, and states a 40 m² monitoring area with a sound alarm and red LED. For premises being fitted out.
Wired into the building's alarm loop
✅ Joins the building system The unit is wired for networking, so it can be linked to a building intercom or a security alarm panel.
✅ Runs on a DC line It draws 9 to 28 V from the wired supply, and the pack contains no battery that needs replacing.
✅ One room per unit The stated monitoring area is 40 m², which is one large room, a corridor stretch or a small office.
✅ Sound plus a red LED Alarm sound pressure is given as at least 85 dB, and a red LED indicator lights with the sound.
✅ Fixings in the box Two screws, two expansion tubes, a terminal line and a manual come with the detector, so installation starts with the parcel.
The settings named are residences, shops, hotels, restaurants, offices, teaching buildings, banks, libraries, computer rooms and warehouses: the kind of rooms where a detector is part of a building's wiring rather than a stand-alone unit on a shelf.
Fixing is by the two screws and expansion tubes, with the terminal line supplied for the connection. No mounting height or cable length is given, so the position and the length of the run are for whoever installs it to set.
The working range is -10 to +50 C at up to 95% relative humidity without condensation, which covers unheated halls and plant rooms but not a room where steam gathers on the surfaces. No certification or standard number is stated, so check what your insurer or building code asks for.
The link to an intercom or alarm system is named, but the protocol and the number of units per loop are not, so an electrician should confirm how the detector sits on the existing system before a batch is ordered.
Technical details
- Type: smoke detector with sound and light alarm
- Model: 820, model number YW
- Material: ABS
- Supply: DC 9-28 V, wired
- Current: 70 mA quiescent or less, 90 mA or less in alarm
- Alarm output: 85 dB or more, red LED indicator
- Monitoring area: 40 m²
- Working temperature: -10 to +50 C
- Humidity: 95% RH or less, non-condensing
- Pack contents: detector, terminal line, 2 screws, 2 expansion tubes, manual
Check the room size and the DC line, then fix the detector and wire it into the loop.
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