Residential · AMF20

Single-phase meter

The first smart meter with long-range radio communication.

Bidirectional, Class 1 and with a 60 A disconnect relay. It installs like a conventional meter and communicates over the Mesh network, with no SIM card or cellular signal.

60 Adisconnect and reconnect relay

Class 1active and reactive

90days of load profile in memory

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How it measures

A standalone instrument, always connected

The meter works on its own, as certification requires, and also reports everything to the platform. If it loses communication, the data stays stored.

Measures every 2 seconds

Continuous sampling of voltage, current and power.

Logs every 5 minutes

Stores the interval measurement with maximum voltage, minimum voltage and maximum current.

Stores 90 days

The complete load profile stays in internal memory, even without communication.

Sends over the Mesh network

Data reaches CLOUD AMIAR through other meters and the gateway.

Features

Much more than a reading

Combines metering of imported and exported, active and reactive energy, with a design that protects the meter and its communications against fraud.

Four-quadrant bidirectional meteringEnergy consumed and generated: ready for customers with solar panels.
Complete electrical variablesActive, reactive and apparent power; voltage, current, frequency and power factor, instantaneous and historical.
Remote disconnect and reconnectInternal relay up to 60 A, with no external contactors.
Fraud detectionAlarm on cover opening and device tampering.
Last gaspA supercapacitor gives it enough autonomy to report that it has lost power.
Event log and audit trailEverything is recorded in the meter and on the platform.
Display fixed on active energyThe value that matters is always on screen: prevents reading errors.
Local readingIrDA optical port with DLMS protocol and active and reactive energy LEDs.

Versions

Urban or rural, the same meter

The difference is the antenna. In a rural network, fitting an outdoor antenna on the first meters is enough: they provide coverage to the rest.

Internal antenna

Urban version

Integrated PCB antenna. The meter is installed inside the meter pillar or meter box.

300 to 700 m between meters in the city
Up to 400 m in dense indoor environments

Outdoor antenna

Rural version

Antenna with a 5 m cable routed through the service entrance conduit up to the weatherhead or the pole.

Conservative planning: 6 km per hop
Up to 10 km line of sight

Datasheet

Specifications

Data from the official datasheet of the AMIAR AMF20 single-phase meter.

Download datasheet (PDF)

Electrical

Metering mode: Single-phase, 2-wire
Accuracy class: Class 1 active and reactive
Rated voltage: 220 V
Rated / maximum current: 5 A / 60 A
Starting current: 0.1% of In
Frequency: 50 – 60 Hz

Remote communication

Frequency band: 918 to 924 MHz (configurable)
Indoor / urban range: Up to 400 m
Outdoor / line-of-sight range: Up to 10 km
Transmit power: Up to 29.5 dBm (900 mW)
Receiver sensitivity: −109 dBm
Topology and modulation: Mesh · OFDM · 500 kHz channel

Local communication and display

Optical: IrDA DLMS/COSEM (IEC 62056-21)
Serial: RS485 DLMS/COSEM, Modbus RTU (optional)
Display: 2-line LCD: 6 + 3 digits
Indicator LEDs: Power, communication, alarms and no load
Pulse output: IEC 62053-31, active and reactive
Clock: RTC with backup battery, 10 years

Environmental and mechanical

Protection: IP51 · Class II insulation · indoor use
Operating temperature: −25 °C to +55 °C (class 3K6)
Storage: −40 °C to +85 °C
Electromagnetic compatibility: Burst 4 kV · ESD 8 kV contact / 15 kV air · surge 6 kV
Interference: CISPR 22, class B equipment
Dimensions: 118 × 160 × 71 mm