NodOn Zigbee Multifunction Relay Switch with Metering
Last updated November 2026

NodOn Zigbee Multifunction Relay Switch with Metering

A compact 14A Zigbee module with a potential-free output plus power and energy metering, built to automate and monitor a water heater, boiler, socket or gate.

4.7
15 ratings

4.7 vs the 4.4 average of 47 relays we track

£41.86
Buy on Amazon UK
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Launch Year: 2024

Model: SIN-4-1-21

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Our review

NodOn Zigbee Multifunction Relay Switch with Metering Review: An In-Wall Relay That Measures What It Switches

The verdict

The NodOn Zigbee Multifunction Relay Switch with Metering (SIN-4-1-21) is a concealed 14A relay that switches one 230 V circuit and reports its instantaneous power and cumulative energy. Its potential-free output works as a held dry contact for a boiler or water heater, a pulsed one for gates, garage doors and electric latches, or a wet contact for a socket or lighting line, and an optional wired switch on its input keeps manual control. It carries all four protections, acts as a Zigbee router and runs locally through Home Assistant, but it needs a Zigbee coordinator and has no Matter, Apple Home or Google Home support.

Best for
  • Metering a water heater or boiler circuit
  • Home Assistant and Zigbee2MQTT households
  • Gates, garage doors and electric latches
  • Retrofitting a socket or lighting line
Buy on Amazon UK

Pros

  • Switches and measures one 230 V circuit up to 14A and 3000W
  • Instantaneous power (W) and cumulative energy (Wh) metering
  • Potential-free output, held or pulsed, for boilers, gates and latches
  • Optional wired switch input with monostable or bistable detection
  • Overheating, overvoltage, overcurrent and overpower protection
  • Acts as a Zigbee router, with over-the-air updates
  • Local control through Home Assistant via ZHA or Zigbee2MQTT
  • Compact 44 x 40 x 16.9 mm module, under 1W idle

Cons

  • Needs a Zigbee hub, no Wi-Fi radio
  • Requires a neutral wire
  • No metering when wired as a dry contact
  • No Matter, Apple Home or Google Home support
  • Alexa control is on/off only
  • No on/off button on the module
  • DIN-rail mounting needs an optional accessory

Who is the NodOn Zigbee Multifunction Relay Switch with Metering for?

It suits anyone who wants smart control and energy data on a circuit a plain smart switch cannot handle. The potential-free output is the right tool for equipment that is not a simple light: a boiler or water heater call, a gate or garage door operator, an electric latch, or a socket to switch and monitor. It is a flush-mount module that hides behind a wall switch or in a junction box, and the optional NodOn DIN Rail Box moves it into the electrical panel. It joins a Zigbee network, so it fits a home that already has a coordinator.

What the NodOn Zigbee Multifunction Relay Switch with Metering offers

It switches and measures in the same unit: an output rated up to 14A and 3000W at 230 V for resistive loads, with inductive and capacitive loads also supported, plus instantaneous power (W) and cumulative energy (Wh) that Zigbee2MQTT exposes as power and energy. It can be wired as a dry contact, held or pulsed, or as a wet contact that passes the input's potential to the load. A wired switch on the input is optional and the module detects whether it is monostable or bistable, so an existing wall switch keeps working and can drive automations. Overheating, overvoltage, overcurrent and overpower protection are all built in, power-off memory restores its state after an outage, it draws under 1W idle, it takes over-the-air updates, and being mains-powered it acts as a Zigbee router that strengthens the mesh. At 44 x 40 x 16.9 mm and 34 g it fits a standard flush box, with a 2 year warranty.

What to know before you buy

It needs a Zigbee hub and has no Wi-Fi radio. A neutral wire is required. Metering comes with a condition: the measurement is not available when the module is wired as a dry contact. Platform support is narrow outside Home Assistant: Alexa can only switch it on and off with no energy data, SmartThings support may be limited, and there is no Google Home, Apple Home or Matter. There is no on/off button on the module, so manual control relies on a wired switch at the input, and DIN-rail mounting needs the separate DIN Rail Box. It has a single relay channel and no shutter or interlock mode.

Is the NodOn Zigbee Multifunction Relay Switch with Metering worth it?

For one hard-to-automate circuit it packs a potential-free output, a 14A rating, full protections and energy metering into a module small enough to disappear into a flush box. In a home running Home Assistant or Zigbee2MQTT it is a practical pick for water heaters, boilers, gates and switched sockets. Anyone who needs Matter, Apple Home or Google Home, or who will wire it as a dry contact and still wants metering, should look elsewhere.

Frequently asked questions

Does the NodOn Zigbee Multifunction Relay Switch with Metering need a hub?

Yes. It is a Zigbee device with no Wi-Fi, so it needs a Zigbee coordinator such as Home Assistant with ZHA or Zigbee2MQTT.

Does it measure energy use?

Yes. It reports instantaneous power in watts and cumulative energy in watt-hours. The measurement is not available when the module is wired as a dry contact.

Does it need a neutral wire?

Yes. A neutral wire is required at the installation point.

Can it control a gate, garage door or electric latch?

Yes. Its potential-free output works as a pulsed dry contact for gates, garage doors and electric latches, and as a held dry contact for a boiler or water heater.

Does it work with Alexa, Google Home or Apple Home?

Alexa can switch it on and off but does not show energy data, and SmartThings support may be limited. It does not work with Google Home, Apple Home or Matter. Home Assistant exposes both switching and metering.

Company
NodOn logo

NodOn

4.4/ 5 avg ratingFrance flagHeadquartered in France

NodOn is a French manufacturer of Zigbee and EnOcean sensors and actuators for smart homes and buildings, part of the Altyor group and focused on energy efficiency, metering and battery-free devices. Its Zigbee range covers relays, energy monitors, radiator valves, temperature and door sensors and an air-conditioner infrared controller, all Zigbee 3.0 certified. The devices work with Amazon Alexa, SmartThings, Home Assistant, Homey, Jeedom and Zigbee2MQTT gateways.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Dimensions

1.7 × 1.6 × 0.7 in 44 × 40 × 16.9 mm

Weight

1.2 oz 34 g

AC Power

YES

AC Load Voltage

230 V

Resistive Load

YES

Max Resistive Load Power (Per Channel)

3000W

NodOn technical data: max. power 3000W, integrated zero crossing.

Max Resistive Load Current (Per Channel)

14A

NodOn technical data: switching capabilities 230V AC - 14A.

Inductive Load

YES

Max Inductive Load Power (Per Channel)

?

Max Inductive Load Current (Per Channel)

?

Capacitive Load

YES

Max Capacitive Load Power (Per Channel)

?

Max Capacitive Load Current (Per Channel)

?

DC Power

?

Max DC Load Power (Per Channel)

?

Max DC Load Current (Per Channel)

?

DC Load Voltage

?

Neutral Required

YES

Idle Consumption

<1W

Minimum Load (No Neutral)

-

Overheating protection

YES

Overvoltage protection

YES

Overcurrent protection

YES

Overpower protection

YES

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

Zigbee Hub required

Thread Protocol

NO

Radio Frequency

NO

Google Home

NO

Not compatible with Google Home.

Alexa

Partially

On/off control only. Energy consumption is not available through Alexa.

Apple HomeKit

NO

Samsung SmartThings

Partially

Compatible with Samsung SmartThings, though support may be limited.

Home Assistant

YES

Works with Home Assistant through ZHA and through Zigbee2MQTT.

Matter

NO

Relay Channels

1

Energy Monitoring

YES

Measures instantaneous power (W) and cumulative energy (Wh), which Zigbee2MQTT exposes as the power and energy properties. The measurement is not available when the module is wired as a dry contact.

Power Off Memory

YES

Wireless Switch Mode

YES

A wired switch is optional on the input terminal, and the module auto-detects a monostable or bistable switch, so an existing wall switch keeps working and can drive automations.

Dry Contact Mode

YES

The output is potential-free, used as a held dry contact for a boiler or water heater and as a pulsed dry contact for gates, garage doors and electric latches.

Wet Contact Mode

YES

The potential applied to the input terminal passes through to the output, so it can switch a live load such as a socket or a lighting circuit.

Interlock/Cover/Roller mode

NO

DIN rail mount

NO

A flush-mount module; panel installation needs the optional NodOn DIN Rail Box accessory.

On/Off Button

NO

Automations

YES

Zigbee Router

YES

Mains-powered. Every NodOn SIN micromodule acts as a Zigbee router.

OTA

YES

Local Control

YES

Shutter Mode

NO

NodOn lists one potential-free relay output and sells a separate Roller Shutter Relay Switch for shutters.

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Required to work

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Why it needs a Zigbee coordinator

The NodOn Zigbee Multifunction Relay Switch with Metering speaks Zigbee, not Wi-Fi. On its own it cannot reach your phone, your voice assistant or any automation: it needs a Zigbee coordinator to join. These are the ones in our catalog that can run it.

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