Fibaro
Fibaro Flood Sensor (FGFS-101)
- Works with HA
- Local control
- Z-Wave
Prices verified November 2026
See more sensors picks on our Amazon storefront →Our verdict
The premium Z-Wave flood sensor: besides water it has a temperature sensor, a tilt sensor that alerts if it is moved, a built-in siren, a tamper switch and a dry-contact output, and it can run on a battery or on 12/24 V DC. Z-Wave JS has dedicated configs for both hardware generations, so it works with Home Assistant locally with no cloud. At £53.00 the extra features only matter if you will use the siren, tilt or temperature trigger. Buy the Z-Wave Plus (second generation) unit, not an old first-generation unit sold secondhand.
What can Home Assistant control on the Fibaro Flood Sensor (FGFS-101)?
| Control | Type | What it does |
|---|---|---|
| Water leak | Binary sensor | Flood alarm from the sensing contacts. |
| Temperature | Sensor | Built-in temperature, useful for a freeze or rapid-rise alert. |
| Tilt / tamper | Binary sensor | Alerts if the sensor is moved or opened. |
Supported by the built-in Z-Wave JS integration (Local Push) with separate device configs for the first-generation and Z-Wave Plus hardware, so inclusion identifies the correct one. It exposes the water alarm, temperature, tilt/tamper and battery as separate entities, (exact entity list not verified). Siren and parameter behaviour were not verified against the Z-Wave JS config. The sensor only alerts: it does not shut off water, so pair it with a motorised valve if you want that.
Specs
| tilt | Detects tilt and movement over 15 degrees — Vesternet |
|---|---|
| power | Battery powered or 12/24 V DC; one battery lasts about 2.5 years on default settings — Vesternet |
| radio | Z-Wave Plus, security S0 — Vesternet |
| outputs | Built-in alarm siren; dry contact output for an alarm system — Vesternet |
| sensors | Tamper, temperature, tilt, water — Vesternet |
| hardware generations | Z-Wave JS has separate configs for first-generation (productType 0x0b00) and Z-Wave Plus (0x0b01) units |
How does the Fibaro Flood Sensor (FGFS-101) compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| Fibaro Flood Sensor (FGFS-101) (this product) | £53 | Z-Wave | Yes | Works with HA |
| Aico Ei3016 (Mains Optical Smoke Alarm) | £53.89 | Wi-Fi | Cloud | HACS |
| Airthings View Plus | £259 | Wi-Fi, Bluetooth | Cloud | Native |
| Apollo Automation MSR-2 mmWave Multisensor | £38.7 | Wi-Fi, Bluetooth | Yes | Native |
Frequently asked questions
- Does the Fibaro Flood Sensor (FGFS-101) work with Home Assistant locally?
- Yes. The Fibaro Flood Sensor (FGFS-101) is controlled locally in Home Assistant through a certified "Works with Home Assistant" integration (zwave_js), so it keeps working if your internet connection or the Fibaro cloud goes down. Control and state updates stay on your own network.
- Which protocol does the Fibaro Flood Sensor (FGFS-101) use, and do I need a hub?
- The Fibaro Flood Sensor (FGFS-101) uses Z-Wave. To pair it with Home Assistant you need a Z-Wave controller stick attached to your Home Assistant host. Fibaro's own hub is not required when you integrate through a certified "Works with Home Assistant" integration (zwave_js).
- How much does the Fibaro Flood Sensor (FGFS-101) cost in the UK?
- The lowest price we have listed for the Fibaro Flood Sensor (FGFS-101) is £53 at Vesternet. Prices were last checked in November 2026 and change often, so confirm on the retailer's page before buying.