Accessories & Sensors. Everything that isn’t a relay or dimmer: temperature, humidity, water leak, motion, door/window and gas sensors; the Shelly Pill modular sensor system and its add-ons; wall switches, frames and touchscreen displays for physical control; current-clamp and CT accessories for energy monitoring; BLU-series Bluetooth buttons, remotes and the BLU Gateway; and the TRV radiator valve. Sensors are split across WiFi, Bluetooth (BLU) and Z-Wave (Wave) connectivity — check which hub or app ecosystem you’re already running before choosing, since these aren’t interchangeable at the protocol level.
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A small accessory required for no-neutral installations of the Shelly 1L, Shelly Dimmer 2 and Shelly Dimmer Gen3, allowing low-wattage loads such as LED bulbs to switch and dim correctly without flickering or failing to turn off fully.
The Shelly Flood is a battery-powered Wi-Fi leak sensor with a built-in temperature sensor, described as the world's first Wi-Fi flood and rain sensor with temperature measurement. It runs on a single CR123A battery for up to 18 months and alerts you the moment water is detected on the floor.
The Shelly 3EM is a Wi-Fi three-phase energy meter with built-in contactor control, letting you individually monitor consumption of appliances, circuits, or a whole home installation including solar generation. It measures three channels simultaneously and pairs relay-style load switching with metering in one device.
The Shelly Gas CNG is a mains-powered Wi-Fi gas detector with a sensitive module specifically for compressed natural gas leaks, giving a flashing LED and sound alarm when triggered. It includes a jack output for connecting an automatic shut-off valve manipulator, so a detected leak can cut gas supply as well as alert you.
A photoelectric smart smoke alarm designed to catch slow, smouldering fires before they take hold, sending instant phone notifications and letting you build safety scenes around an alert. Runs on a CR123A/CR17335 battery for up to 5 years and connects over WiFi and Bluetooth with MQTT support.
The DS18B20 is a temperature probe designed to add temperature sensing to compatible Shelly relays that support an external sensor addon. It plugs into the Shelly 1/1PM temperature addon or a Shelly Uni, letting you trigger automations or logging based on measured temperature rather than relying on the relay alone.
A Wi-Fi energy meter for monitoring the consumption of individual appliances, circuits or a whole home, including solar generation, with two independent measurement channels up to 120A each. It also includes built-in contactor control functionality and stores 365 days of energy history on the device.
The Shelly EM with 120A clamp is a Wi-Fi energy meter for monitoring individual appliances, circuits or whole-home and solar consumption across two channels, each rated up to 120A. It includes contactor control for switching loads and stores 365 days of energy history on-device, with overpower shutdown and consumption limit features built in.
This 120A current transformer clamp is an accessory for the Shelly Pro 3EM-120A and Shelly EM Gen4, letting you monitor circuits rated up to 120A. It has a 16mm internal core diameter and a ferrite core with 1% accuracy.
The Shelly EM Gen3 is a compact energy meter using up to two current transformers for contactless metering of appliances or circuits, with a single dry contact for switching an external load. It stores readings internally, works standalone over Wi-Fi or via cloud services, and fits into standard wall boxes behind sockets or switches.
The Shelly BLU RC Button 4 ZB is a wire-free remote with four physical buttons and multi-click support, giving up to 16 customisable commands from single, double, triple, and long presses. It connects via Bluetooth and Zigbee, mounts with built-in magnets or a 3M adhesive patch, and runs up to two years on a single CR2032 battery.
Shelly Flood Gen4 is a leak detection sensor for basements, kitchens and utility rooms, using an extendable sensor cable to monitor along a surface rather than a single point. It's Matter certified with Wi-Fi, Bluetooth and Zigbee, offers both Flood and Rain detection modes, and runs on AA batteries with a local buzzer.
Shelly EM Gen4 is a dual-channel smart energy meter for single-phase installations, giving real-time and historical monitoring of two separate circuits or appliances via clip-on current transformers. It includes a built-in dry contact relay for automating high-power loads like EV chargers or heat pumps, over Wi-Fi 6, Bluetooth, Zigbee or Matter.
The Shelly BLU Motion is a battery-powered PIR sensor that reports motion instantly over Bluetooth using the BTHome protocol, with a built-in light sensor for brightness-based automations. It runs up to 5 years on a single CR2477 battery and needs a gateway — a Shelly BLU Gateway or any mains-powered Plus, Pro or Gen3 device — to reach the Shelly app.
The Shelly Button Add-on is a surface-mounted enclosure that houses a compatible Shelly relay or dimmer, letting you add smart control to lights or fans without opening walls or fitting a new back box. It comes with pre-installed, colour-coded wiring and works with a wide range of Shelly Gen1, Plus, Gen3, Gen4, and Mini devices.
This is a Shelly EM energy meter bundled with two 120A current clamps, for individually monitoring the consumption of appliances, circuits, or a whole home including solar generation. It's a Wi-Fi energy meter with contactor control functionality, storing 365 days of built-in energy history, in the larger-clamp configuration for higher-current circuits.