AM304L
AM305L
AM307
AM308/AM308L
AM319

AM300 Series
Indoor Air Quality Sensor

AM300 series IAQ sensors monitor up to 9 environmental parameters, providing intuitive visibility into indoor air quality and occupancy to support healthier, more comfortable, and
energy-efficient indoor environments.

Get Expert Advice Now Watch the Video
  • FEATURES
  • MODELS
  • ACCESSORIES
  • DOWNLOAD

Multiple Monitoring Options. Built Around Your Needs.

Sensorsam304l AM304Lam304l AM305Lam307 AM307am308 308l AM308/AM308Lam319 AM319
Temperature
Humidity
Light
PIR
CO₂
TVOC
Barometric Pressure
PM2.5 & PM10
HCHO/O₃

Indoor Air Quality at a Glance

Intuitive IAQ Status Indicators

Intuitive emotion icons and traffic light indicators help you instantly recognize indoor air quality levels.

Optional 4.2-inch E-ink Display

A larger 4.2-inch E-ink display on AM307, AM308, and AM319 supports more interactive features, offering multiple layouts and light/dark color themes for improved usability.

Emoticon Indication

emoticion excellent

Excellent

emoticon polluted

Polluted

emoticon bad

Bad

Traffic Light Status Indicator

indicator

Built-in Buzzer for Alarming

Available on AM307, AM308(L), AM319

Multiple Display Styles

multiple display style 1
multiple display style 2
multiple display style 3

Longer Operation, Less Effort

Battery or Type-C, Built to Last

Designed for Accuracy

Easy NFC Configuration

Secure & Reliable Data

Powered by battery or Type-C, the AM300 series delivers long-lasting operation with multi-year
battery life and a smart power-saving mode.

Stop updating when PIR value is 0 (Vacant)
and lasts for 20 minutes.

Resume updating when motion is detected.

  • Battery Life Up To 7 Years (AM304L)

  • Battery Life Up To 6 Years (AM305L)

  • Battery Life Up To 3 Years (AM307)

  • Battery Life Up To 1 Year (AM308),
    1.5 Year (AM308L)

  • Powered via USB Type-C (AM319)

The AM300 Series delivers reliable and accurate environmental measurements,
featuring an insulation design that minimizes heat impact during chip operation,
along with a dedicated HCHO sensor providing stable readings resistant to
alcohol interference (available on AM319).

Quick and effortless setup via NFC. Simply tap your
smartphone to configure the device. No complex steps or
tools required, significantly reducing deployment time.

Stores up to 18,000 historical records that cannot be
manually erased, ensuring complete data traceability, and
features data retransmission to guarantee full delivery to the
server even if the network is interrupted.

Our Certified IAQ Sensors
Your Helps in WELL and IWBI Community

well product

Milesight AM319 9-in-1 IAQ Sensor has officially earned the coveted Works with WELL mark.
“The Works with WELL program, introduced by IWBI earlier this year in response to the increasing demand for healthier building products and solutions, allows product manufacturers and service providers to validate and demonstrate how their offerings align with requirements in the WELL Building Standard (WELL).“ - IWBI

* WORKS WITH WELL is a trademark of International WELL Building Institute PBC and used by those product manufacturers granted permission by International WELL Building Institute (IWBI) following IWBI's license criteria validation process.

Check Milesight AM300 in Directory from Works with WELL Program

Connected Device, Unified Management

Milesight Development Platform

Provides enterprise-grade IoT device management and
deployment, enabling efficient large-scale IoT implementations.

  • Plug-and-play device setup for internet-enabled devices
  • Bulk device configuration
  • Over-the-air updates
  • Remote access and device sharing
  • Open API and Webhooks for external integrations and
    data exchange

Milesight IoT Cloud

Connect devices to the cloud with data visualization, remote monitoring, and control.

iot cloud

Better Indoor Environments via Connected Ecosystem

Milesight AM300 series indoor air quality sensors integrate seamlessly with HVAC systems, controllers, thermostats, LoRaWAN® gateways, and Building Automation Systems (BAS) to form a connected ecosystem. Through real-time environmental monitoring and automated control, they help create healthier, more comfortable, and more energy-efficient indoor spaces.

  • Healthier and More Comfortable Spaces
  • Better Energy Efficiency
  • Actionable Insights
Explore Full IAQ Solutions
topological graph

Proven IAQ Monitoring Success Across Industries

Education

Transportation

Residential

Commercial

canada Canada
See How We Did It

Milesight 47,000 IAQ Sensors Create a Healthier Learning Environment in Canadian Schools

47,000 Milesight IAQ sensors were deployed across school classrooms throughout the province of Quebec to continuously monitor temperature, humidity, and CO₂ levels. With real-time visibility into indoor conditions, ventilation issues can be detected early and addressed promptly to improve air circulation, helping create healthier, more comfortable learning environments that support student well-being and learning performance.

Location:

Quebec, Canada

Partner:

Assek Technologie

Devices Deployed:

AM107*47,000 Units (Now Upgraded to AM307), UG65

topological graph canadian school
canadian schools
turkey Turkey
See How We Did It

Real-Time Air Quality Monitoring Transforms Major Turkish Airports

Milesight AM308L IAQ sensors were deployed across terminals at major airports in Turkey to monitor essential air quality parameters. Through a fully wireless LoRaWAN® network, real-time monitoring enables faster responses and more effective ventilation management, helping create a healthier and more comfortable airport environment for millions of passengers.

Location:

Turkey

Partner:

Dvm

Devices Deployed:

AM308L*106 Units, UG63 & SG50*20

topological graph turkish airport
turkish airport
dubai Dubai
See How We Did It

Smart IAQ Monitoring Enhances Living Comfort in Dubai Villas

Milesight AM319 IAQ sensors were deployed in luxury villas in Dubai integrated with Sensgreen's Smart Building Platform. This solution reduced energy use by 16%, cut costs by 12%, and improved humidity control, enhancing guest comfort and speeding up HVAC issue resolution by 35%.

Location:

Dubai, UAE

Partner:

Sensgreen

Devices Deployed:

AM319*50 units

topological graph dubai villas
dubai villas
singapore Singapore
See How We Did It

IAQ Solution Empowers Sustainability of Smart Retail in Singapore NEX Shopping Mall

NEX Shopping Mall in Singapore has integrated Milesight AM319 IAQ sensors with the Honeywell platform and its HVAC system.
This solution enhances air quality for shoppers, tenants, and staff while optimizing energy savings.

Location:

Singapore

Partner:

UnaBiz, CLAPPIO

Devices Deployed:

AM319*35 units

topological graph singapore mall
singapore shopping mall

Essential IAQ Monitoring, Simplified

Milesight offers a comprehensive product portfolio for essential indoor air quality monitoring,
delivering the right capabilities in a compact, space-efficient design.

am102 1 am102 2

AM102/AM102L

2-in-1 IAQ Sensor

AM102/AM102L

2-in-1 IAQ Sensor

  • Monitors temperature and humidity, covering the most essential
    indoor environmental indicators. A compact design that fits everyday
    monitoring needs.
am103 1 am103 2

AM103/AM103L

3-in-1 IAQ Sensor

AM103/AM103L

3-in-1 IAQ Sensor

  • Monitors temperature, humidity, and CO₂ concentration to provide
    real-time visibility into indoor air quality and ventilation conditions. Delivers essential IAQ insights in a compact design.

Specifications

Wireless Transmission
TechnologyLoRaWAN®
AntennaInternal Antenna
FrequencyCN470/RU864/IN865/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power16dBm(868MHz)/22dBm(915MHz)/19dBm(470MHz)
Sensitivity-137dBm @300bps
Work ModeOTAA/ABP Class A
Sensors
Temperature
Operating PrincipleDigital CMOSens® technology (MEMS)
Range-20°C~60°C
Accuracy[1]Typ. ±0.3°C (-20°C ~ 0°C), ± 0.2°C (0°C ~ 60°C)
Resolution0.1°C
Humidity
Operating PrincipleDigital CMOSens® technology (MEMS)
Range0% ~ 100% RH
Accuracy[2][3]Typ. ± 2% RH (25°C)
Resolution0.5% RH
Motion
Operating PrinciplePassive infrared (PIR)
Detection Range80 ° Horizontal, 55 ° Vertical, 3m
StatusVacant/Trigger
Light
Operating PrinciplePhotodiode
Range0-60000 Lux
Report ModeIlluminance Value or
Illuminance Level (0-5)
Accuracy±30%
Resolution1 Lux
TVOC
Operating Principle/
Range[4]/
Accuracy/
Resolution/
Barometric Pressure
Operating Principle/
Range/
Accuracy/
Resolution/
Carbon Dioxide (CO2)
Operating Principle/
Range/
Accuracy/
Resolution/
PM2.5 & PM10
Operating Principle/
Range/
Accuracy/
Resolution/
Other Interfaces
DisplayAM307 & AM308: 4.2-inch Black & White E-Ink Screen
AM304L & AM305L & AM308L: Not Support
Button1 × Power Button + 1 × Reset Button
LED1 × Traffic Light Status Indicator
Buzzer/
USB1 × Type-C Port for Power Supply or
Console
Software
Configuration1. Mobile App via NFC
2. Downlink
Advanced FeaturesCalibration, Threshold Alarm, Data Storage (18, 000 entries for AM307 andAM308(L), 4320 entries for AM304L and AM305L), Data Retrievability, Data Retransmission, Smart Screen Mode, Button Lock
Physical Characteristics
Power Supply1. 4 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
2. 5V/1A by Type-C Port
Battery Life[5]
(10 min interval, 25°C)		Around 14 Years (SF7, EU868)
Around 12.5 Years (SF7, US915)
Around 7.5 Years (SF10, EU868)
Around 3.9 Years (SF10, US915)
Operating Temperature-20°C - 60°C (E-Ink Screen: 0°C - 40°C)
Relative Humidity10% - 90% (non-condensing)
Ingress ProtectionIP30
Housing&ColorPC+ABS (V0), White
Weight181.25g
Dimension100.8 × 114 × 22 mm (3.97 × 4.49 × 0.87 in)
InstallationWall Mounting via 3M Tape or Screws
Approvals
RegulatoryCE, CE (RED), FCC
EnvironmentalRoHS

Wireless Transmission
TechnologyLoRaWAN®
AntennaInternal Antenna
FrequencyCN470/RU864/IN865/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power16dBm(868MHz)/22dBm(915MHz)/19dBm(470MHz)
Sensitivity-137dBm @300bps
Work ModeOTAA/ABP Class A
Sensors
Temperature
Operating PrincipleDigital CMOSens® technology (MEMS)
Range-20°C~60°C
Accuracy[1]Typ. ±0.3°C (-20°C ~ 0°C), ± 0.2°C (0°C ~ 60°C)
Resolution0.1°C
Humidity
Operating PrincipleDigital CMOSens® technology (MEMS)
Range0% ~ 100% RH
Accuracy[2][3]Typ. ± 2% RH (25°C)
Resolution0.5% RH
Motion
Operating PrinciplePassive infrared (PIR)
Detection Range80 ° Horizontal, 55 ° Vertical, 3m
StatusVacant/Trigger
Light
Operating PrinciplePhotodiode
Range0-60000 Lux
Report ModeIlluminance Value or
Illuminance Level (0-5)
Accuracy±30%
Resolution1 Lux
TVOC
Operating Principle/
Range[4]/
Accuracy/
Resolution/
Barometric Pressure
Operating Principle/
Range/
Accuracy/
Resolution/
Carbon Dioxide (CO2)
Operating PrincipleNondispersive Infrared (NDIR)
Range400 ~ 5000 ppm
Accuracy± (30 ppm + 3 % of reading)
(0°C~ 50°C, 0% to 85%RH)
Resolution1 ppm
PM2.5 & PM10
Operating Principle/
Range/
Accuracy/
Resolution/
Other Interfaces
DisplayAM307 & AM308: 4.2-inch Black & White E-Ink Screen
AM304L & AM305L & AM308L: Not Support
Button1 × Power Button + 1 × Reset Button
LED1 × Traffic Light Status Indicator
Buzzer/
USB1 × Type-C Port for Power Supply or
Console
Software
Configuration1. Mobile App via NFC
2. PC software via NFC or USB Type-C port
3. Downlink
Advanced FeaturesCalibration, Threshold Alarm, Data Storage (18, 000 entries for AM307 andAM308(L), 4320 entries for AM304L and AM305L), Data Retrievability, Data Retransmission, Smart Screen Mode, Button Lock
Physical Characteristics
Power Supply1. 4 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
2. 5V/1A by Type-C Port
Battery Life[5]
(10 min interval, 25°C)		Around 11 Years (SF7, EU868&US915)
Around 6.3 Years (SF10, EU868)
Around 3.7 Years (SF10, US915)
Operating Temperature-20°C - 60°C (E-Ink Screen: 0°C - 40°C)
Relative Humidity10% - 90% (non-condensing)
Ingress ProtectionIP30
Housing&ColorPC+ABS (V0), White
Weight187.55g
Dimension100.8 × 114 × 22 mm (3.97 × 4.49 × 0.87 in)
InstallationWall Mounting via 3M Tape or Screws
Approvals
RegulatoryCE, CE (RED), FCC
EnvironmentalRoHS

Wireless Transmission
TechnologyLoRaWAN®
AntennaInternal Antenna
FrequencyCN470/RU864/IN865/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power16dBm(868MHz)/22dBm(915MHz)/19dBm(470MHz)
Sensitivity-137dBm @300bps
Work ModeOTAA/ABP Class A
Sensors
Temperature
Operating PrincipleDigital CMOSens® technology (MEMS)
Range-20°C~60°C
AccuracyTyp. ±0.3°C (-20°C ~ 0°C), ± 0.2°C (0°C ~ 60°C)
Resolution0.1°C
Humidity
Operating PrincipleDigital CMOSens® technology (MEMS)
Range0% ~ 100% RH
AccuracyTyp. ± 2% RH (25°C)
Resolution0.5% RH
Motion
Operating PrinciplePassive infrared (PIR)
Detection Range80 ° Horizontal, 55 ° Vertical, 5m
StatusVacant/Occupied
Light
Operating PrinciplePhotodiode
Range0-60000 Lux (Determine as 6 levels, 0-5)
TVOC
Operating PrincipleMOX (MEMS)
Range11.00 ~ 5.00 (IAQ Rating)
Accuracy±1
Resolution0.01
Barometric Pressure
Operating PrinciplePiezoresistive absolute pressure sensor (MEMS)
Range260 - 1260 hPa
Accuracy±0.5 hPa
Resolution0.1 hPa
Carbon Dioxide (CO2)
Operating PrincipleNondispersive Infrared (NDIR)
Range400 ~ 5000 ppm
Accuracy± (30 ppm + 3 % of reading)
(0°C~ 50°C, 0% to 85%RH)
Resolution1 ppm
PM2.5 & PM10
Operating Principle—
Range—
Accuracy—
Resolution—
Other Interfaces
DisplayAM307 & AM308: 4.2-inch Black & White E-Ink Screen
AM304L & AM305L & AM308L: Not Support
Button1 × Power Button + 1 × Reset Button
LED & Buzzer1 × Traffic Light Status Indicator + 1 × Buzzer
USB1 × Type-C Port for Power Supply, Configuration or Console
Software
Configuration1. Mobile App via NFC
2. PC software via NFC or USB Type-C port
3. Downlink
Advanced FeaturesCalibration, Threshold Alarm, Data Storage (18, 000 entries), Data Retrievability, Data Retransmission, Smart Screen Mode, Button Lock
Physical Characteristics
Power Supply1. 4 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
2. 5V/1A by Type-C Port
Battery Life2Around 3.9 Years (SF7, EU868 &US915)
(10 min interval, 25°C)Around 3.1 Years (SF10, EU868)
Around 2 Years (SF10, US915)
Operating Temperature-20°C - 60°C (E-Ink Screen: 0°C - 40°C)
Relative Humidity10% - 90% (non-condensing)
Ingress ProtectionIP30
Housing&ColorABS (UL94 HB), White
Weight182.5g (With Batteries)
Dimension100.8 × 114 × 22 mm (3.97 × 4.49 × 0.87 in)
InstallationWall Mounting via 3M Tape or Screws
Approvals
RegulatoryCE, FCC, ISED, RED
EnvironmentalRoHS

1Reference to IAQ rating guideline (conversion from mg/m3 to ppm by the factor is about 0.5):
22.The battery life is tested under laboratory conditions and for guideline purposes only.

Wireless Transmission
TechnologyLoRaWAN®
AntennaInternal Antenna
FrequencyCN470/RU864/IN865/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power16dBm(868MHz)/22dBm(915MHz)/19dBm(470MHz)
Sensitivity-137dBm @300bps
Work ModeOTAA/ABP Class A
Sensors
Temperature
Operating PrincipleDigital CMOSens® technology (MEMS)
Range-20°C~60°C
AccuracyTyp. ±0.3°C (-20°C ~ 0°C), ± 0.2°C (0°C ~ 60°C)
Resolution0.1°C
Humidity
Operating PrincipleDigital CMOSens® technology (MEMS)
Range0% ~ 100% RH
AccuracyTyp. ± 2% RH (25°C)
Resolution0.5% RH
Motion
Operating PrinciplePassive infrared (PIR)
Detection Range80 ° Horizontal, 55 ° Vertical, 5m
StatusVacant/Occupied
Light
Operating PrinciplePhotodiode
Range0-60000 Lux (Determine as 6 levels, 0-5)
TVOC
Operating PrincipleMOX (MEMS)
Range11.00 ~ 5.00 (IAQ Rating)
Accuracy±1
Resolution0.01
Barometric Pressure
Operating PrinciplePiezoresistive absolute pressure sensor (MEMS)
Range260 - 1260 hPa
Accuracy±0.5 hPa
Resolution0.1 hPa
Carbon Dioxide (CO2)
Operating PrincipleNondispersive Infrared (NDIR)
Range400 ~ 5000 ppm
Accuracy± (30 ppm + 3 % of reading)
(0°C~ 50°C, 0% to 85%RH)
Resolution1 ppm
PM2.5 & PM10
Operating PrincipleLaser Scattering
Range0 ~ 1000 μg/m3
Accuracy0~100(±10μg/m3), 100~1000(±10 %) (-10°C~ 60°C)
Resolution1 μg/m3
Other Interfaces
DisplayAM307 & AM308: 4.2-inch Black & White E-Ink Screen
AM304L & AM305L & AM308L: Not Support
Button1 × Power Button + 1 × Reset Button
LED & Buzzer1 × Traffic Light Status Indicator + 1 × Buzzer
USB1 × Type-C Port for Power Supply, Configuration or Console
Software
Configuration1. Mobile App via NFC
2. PC software via NFC or USB Type-C port
3. Downlink
Advanced FeaturesCalibration, Threshold Alarm, Data Storage (18, 000 entries), Data Retrievability, Data Retransmission, Smart Screen Mode, Button Lock
Physical Characteristics
Power Supply1. 4 × 2700 mAh ER14505 Li-SOCl2 Replaceable Batteries
2. 5V/1A by Type-C Port
Battery Life2Around 1.3 Years (SF7, EU868 & US915)
(10 min interval, 25°C)Around 1.2 Years (SF10, EU868)
Around 1 Year (SF10, US915)
Operating Temperature-20°C - 60°C (E-Ink Screen: 0°C - 40°C)
Relative Humidity10% - 90% (non-condensing)
Ingress ProtectionIP30
Housing&ColorABS (UL94 HB), White
Weight222.6g (With Batteries)
Dimension100.8 × 114 × 22 mm (3.97 × 4.49 × 0.87 in)
InstallationWall Mounting via 3M Tape or Screws
Approvals
RegulatoryCE, FCC, ISED, RED
EnvironmentalRoHS

1Reference to IAQ rating guideline (conversion from mg/m3 to ppm by the factor is about 0.5):
22.The battery life is tested under laboratory conditions and for guideline purposes only.

Wireless Transmission
TechnologyLoRaWAN®
AntennaInternal Antennas
FrequencyCN470/RU864/IN865/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power16dBm(868MHz)/22dBm(915MHz)/19dBm(470MHz)
Sensitivity-137dBm @300bps
Work ModeOTAA/ABP Class C
Sensors
Temperature
Operating PrincipleDigital CMOSens® technology (MEMS)
Range-20°C~60°C
AccuracyTyp. ±0.3°C (-20°C ~ 0°C), ± 0.2°C (0°C ~ 60°C)
Resolution0.1°C
Humidity
Operating PrincipleDigital CMOSens® technology (MEMS)
Range0% ~ 100% RH
AccuracyTyp. ± 2% RH (25°C)
Resolution0.5% RH
Motion
Operating PrinciplePassive infrared (PIR)
Detection Range80 ° Horizontal, 55 ° Vertical, Maximum 5m
StatusVacant/Occupied
Light
Operating PrinciplePhotodiode
Range0-60000 Lux (Determine as 6 levels, 0-5)
TVOC
Operating PrincipleMOX (MEMS)
Report Mode1IAQ Rating or Concentration Value
IAQ RatingRange: 1.00 - 5.00
Accuracy: ±1
Resolution: 0.01
ConcentrationRange: 0 - 2000 μg/m3
Accuracy: 20 μg/m3 ±15% of readings (1 - 500 μg/m3)
Resolution: 1 μg/m3
Barometric Pressure
Operating PrinciplePiezoresistive absolute pressure sensor (MEMS)
Range260 - 1260 hPa
Accuracy±0.5 hPa
Resolution0.1 hPa
Carbon Dioxide (CO2)
Operating PrinciplePhotoacoustic
Range400 ~ 2000 ppm
Accuracy± (50 ppm + 5 % of reading) (-10°C~ 60°C)
Resolution1 ppm
PM2.5 & PM10
Operating PrincipleLaser Scattering
Range0 ~ 1000 μg/m3
Accuracy0~100(±10μg/m3), 100~1000(±10 %) (-10°C~ 60°C)
Resolution1 μg/m3
Formaldehyde (HCHO)2
Operating PrincipleElectrochemical
Range30 ~ 1.25 mg/m3
Accuracy±10 %
Resolution0.01 mg/m3
Working Life6 Years
Ozone (O3)2
Operating PrincipleElectrochemical
Range0 ~ 10 ppm
Accuracy±5 % FS
Resolution0.01 ppm
Working Life2 Years
Other Interfaces
Display4.2-inch Black & White E-Ink Screen
Button1 × Power Button + 1 × Reset Button
LED & Buzzer1 × Traffic Light Status & Alarm Indicator + 1 × Buzzer
USB1 × Type-C Port for Power Supply, Configuration or Console
Software
Power On/Off1. Mobile App via NFC
2. PC software via NFC or USB Type-C port
3. Power Button
Configuration1. Mobile App via NFC
2. PC software via NFC or USB Type-C port
3. Downlink
Advanced FeaturesCalibration, Threshold Alarm, Data Storage (18,000 entries), Data Retrievability, Data Retransmission, Smart Screen Mode, Button Lock
Physical Characteristics
Power Supply5V/1A by Type-C Port
Operating Temperature-20°C - 60°C (E-Ink Screen: 0°C - 40°C)
Relative Humidity10% - 90% (non-condensing)
Ingress ProtectionIP30
Housing & ColorABS (UL94 HB), White
Weight148g
Dimension100.8 × 114 × 22 mm (3.97 × 4.49 × 0.87 in)
InstallationWall Mounting via 3M Tape or Screws
Approvals
RegulatoryCE, FCC, ISED, RED
EnvironmentalRoHS

1Reference to IAQ rating guideline (conversion from mg/m3 to ppm by the factor is about 0.5):
2HCHO or O3 sensor is alternative option and both support replacement.
3For HCHO at 760 mmHg and 20°C, 1 ppm = 1.25 mg/m3.

Documents

AM30x(L) Datasheet AM319 Datasheet AM304L & AM305L User Guide AM307 & AM308(L) & AM319 User Guide Payload Decoder

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