Milesight AM319

Compatibility

Compatible with EpiSensor Edge over LoRaWAN.

Register it on your LoRaWAN network server with its DevEUI and keys. Edge, on the Gateway, reads its decoded uplinks from that server.

Edge reads 14 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The AM319 is the fullest model in Milesight's AM300 series. Beside the AM307's temperature, humidity, CO₂, TVOC, barometric pressure, light level and PIR occupancy, it adds laser-scattering particulate matter and an electrochemical formaldehyde or ozone cell. A 4.2-inch E-ink screen shows the readings in the room, and a traffic-light LED and buzzer warn when a pollutant passes the thresholds you set.^1, 2

Power

DC supply. 5 V 1 A through the USB-C port, with a 1.2 m cable and power adapter in the box. There is no battery option.¹

CO₂

Photoacoustic, 400 to 2,000 ppm, ±(50 ppm + 5 % of reading) at -10 to 60 °C, 1 ppm resolution¹

PM2.5 and PM10

Laser scattering, 0 to 1,000 µg/m³, ±10 µg/m³ (0 to 100) and ±10 % (100 to 500), 1 µg/m³ resolution (O3 and HCHO-IR)¹

PM2.5, HCHO-IR-W

0 to 1,000 µg/m³, ±(5 µg/m³ + 5 % of reading) to 100, ±10 % of reading to 1,000¹

Formaldehyde

Electrochemical, ±10 %; 0 to 1.25 mg/m³ at 0.01 mg/m³ (HCHO-IR), 0 to 1 ppm at 0.001 ppm (HCHO-IR-W); 6-year cell life¹

Ozone

Electrochemical, 0 to 10 ppm, ±5 % FS, 0.01 ppm resolution; 2-year cell life (O3 version)¹

TVOC

Metal-oxide, IAQ rating 1.00 to 5.00 (±1), or 0 to 2,000 µg/m³ (±(20 µg/m³ + 15 %) from 1 to 500 µg/m³)¹

Temperature

-20 to 60 °C, typical ±0.3 °C (-20 to 0 °C), ±0.2 °C (0 to 60 °C)¹

Humidity

0 to 100 % RH, typical ±2 % RH at 25 °C, 0.5 % RH resolution¹

Barometric pressure

260 to 1,260 hPa, ±0.5 hPa¹

Light and occupancy

Photodiode, 0 to 60,000 lux in six levels; PIR, 80° × 55°, up to 5 m¹

LoRaWAN

Class C, OTAA or ABP, versions 1.0.2 and 1.0.3²

Frequency plans

CN470, RU864, IN865, EU868, US915, AU915, KR920, AS923-1 to AS923-4¹

Transmit power

16 dBm (868 MHz), 22 dBm (915 MHz), 19 dBm (470 MHz)¹

Local storage

18,000 records, retransmission and retrieval¹

Operating conditions

-20 to 60 °C (screen 0 to 40 °C), 10 to 90 % RH non-condensing, IP30¹

Dimensions

100.8 × 114 × 22 mm, 148 g¹

Approvals

CE, CE (RED), FCC, ISED, RoHS, Works with WELL¹

Where it is used

• Offices, schools and hospitals that report indoor air quality against a building standard, where CO₂, PM2.5 and formaldehyde come from one device.

  Indoor environmental monitoring

• Checking that ventilation changes made to save energy keep CO₂ and particulates within limits.

  HVAC energy monitoring for commercial buildings

• Newly fitted-out spaces, where formaldehyde from furniture and finishes is the concern.

Interface

Device class

Class C²

Regional plans

EU868, US915, AU915, AS923, KR920, IN865, RU864, CN470

Activation

OTAA or ABP

LoRaWAN version

1.0.2 or 1.0.3

Default uplink interval

10 minutes (1 to 1,080 minutes)

Ports

Decoded fields

Readings and settings, with units and ranges where Milesight publishes them. R readable, W writable only.²

Each uplink is a run of channel, type and value fields, with multi-byte values in little-endian order. The HCHO-IR sends formaldehyde as channel 0A, type 7D in mg/m³; the HCHO-IR-W sends it as channel 0F, type 7D in ppm and has no PM10 field; the O3 version sends ozone as channel 0D, type 7D in ppm. Set up the decoder for the version you have.^2, 3

CO₂ needs calibrating. Either calibrate manually outdoors to 400 ppm before installing, or enable automatic background calibration, which takes the lowest level over 7 days as 400 ppm and suits rooms that are well or partly ventilated.²

When CO₂, TVOC, PM2.5, PM10 or formaldehyde or ozone passes its Bad threshold, the device sends that value at once as an alarm uplink with the buzzer state.²

Setup

1. Register it on the network server

   Add the AM319 as a Class C device using OTAA, with the device EUI from its label, the join EUI 24E124C0002A0001 and its application key. Use the decoder for your version: HCHO-IR, HCHO-IR-W or O3.²

2. Power it on

   Remove the rear cover, plug in the USB-C cable, pass it through the opening in the side and refit the cover. Hold the power button for more than 3 seconds until the LED lights.²

3. Calibrate CO₂ and match the frequency plan

   Read the sensor over NFC with the Milesight ToolBox app. Leave it outdoors for more than 10 minutes and run manual CO₂ calibration to 400 ppm, or enable automatic background calibration. Set the frequency plan to match the network; for US915 or AU915 with Milesight gateway defaults, enable channels 8 to 15.²

4. Mount it where people breathe

   Fix the bracket with the 3M tape or screws at least 1.5 m above the floor, away from windows, doors, vents and heat sources, and do not cover the air inlets.²

5. Check the decode

   Confirm the network server decodes CO₂, particulate matter and the formaldehyde or ozone field from the next uplink on port 85 before you connect it to Edge. After storage, leave it powered in clean air so the TVOC reading settles: at least 2 days after under a month, 3 days after up to 6 months, 7 days after longer.²

Common questions

Which AM319 version should I choose?

The HCHO-IR for formaldehyde in mg/m³ with PM2.5 and PM10, the O3 for ozone with PM2.5 and PM10, or the HCHO-IR-W for formaldehyde in ppm at finer resolution with PM2.5 only.¹

Can it run on batteries?

No. The AM319 is powered only by 5 V 1 A through USB-C. The battery models in the series are the AM307 and AM308.¹

How long do the gas sensors last?

Milesight gives the formaldehyde cell a working life of 6 years and the ozone cell 2 years. Both can be replaced with chips from Milesight.^1, 2

Why is it a Class C device?

It is powered from USB-C rather than a battery, so it can keep its receiver open between uplinks, which is what Class C means. Configuration downlinks then reach it without waiting for its next report.^1, 5

Does the CO₂ sensor need calibrating?

Yes. Use manual calibration outdoors to 400 ppm before installing, or enable automatic background calibration over 7 days. The device reports 400 ppm for any value below 400 after calibration.²