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Orion Air Quality Monitoring Systems

Orion Air Quality Monitor (AQM Plus)

Orion AQM-Complete measures gaseous pollutants, met parameters, and particulates.

Purpose of Air Quality Monitoring:

Make your environment a healthier and safer place by measuring, analyzing, and understanding the data of air pollution with this outdoor air quality monitor.


Urban air quality networks, air pollution monitor, industrial emission monitoring, building automation, and air quality research.

  • Monitor both air quality and met data with near reference measurement performance
  • All-in-one units sensor modules for easy installation
  • MicroServer-based monitoring also offers individual sensor options
  • Additional meteorological sensors can be integrated such as wind, precipitation, and solar radiation
  • Cost-effective, compact sensor solution

Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making. Choose from three models, all of which include the basic meteorological parameters of temperature, humidity, and barometric pressure.

Orion AQM Complete:

  • Particulate measurement with PM1, PM2.5 and PM10 sensor
  • Common gaseous pollutants: nitrogen dioxide (NO2), nitrogen monoxide (NO), carbon monoxide (CO) and ozone (O3)
  • Met parameters of temperature, humidity, barometric pressure

Orion AQM - PM:

  • Particulate measurement with PM1, PM2.5 and PM10 sensor
  • Met parameters of temperature, humidity, barometric pressure

Orion AQM - Gas:

  • Common gaseous pollutants: nitrogen dioxide (NO2), nitrogen monoxide (NO), carbon monoxide (CO) and ozone (O3)
  • Met parameters of temperature, humidity, barometric pressure

Air quality measurement device (aka air pollution monitor) integrates with the Weather MicroServer for monitoring via Cloud Server, any Internet Browser, SCADA systems and/or various industrial protocols.

Call or email for personal assistance in selecting the right configuration for your application.

Orion AQM Environmental Monitoring System Diagram

Orion Air Quality Monitoring System Diagram

Sensor Measurement & Specification 

Choose from three professional air quality monitoring system models, all of which include the basic meteorological parameters of temperature, humidity, and barometric pressure. Click on the tabs below for more information on each model.


The Orion AQM-Gas measures the most common gaseous pollutants nitrogen dioxide (NO2), nitrogen monoxide (NO), carbon monoxide (CO) and ozone (O3), with near-reference measurement performance. Includes the basic meteorological parameters of temperature, humidity, and barometric pressure.

With an enclosure made of anodized aluminum and stainless steel, and a protective rating of IP65, the AQM sensors are built to withstand industrial environments.

Gas Measurement Performance

Gas Range Detection Limit Field Accuracy
NO2 2000 ppb 5 ppb ±20 ppb
NO 2000 ppb 5 ppb ±60 ppb
CO 10000 ppb 10 ppb ±350 ppb
O3 2000 ppb 5 ppb ±30 ppb

*90 % confidence interval in comparing with reference instrument, includes T and %RH dependence in typical field conditions and sensor drift during calibration interval. Electrochemical cell replacement interval 12–24 months, depending on local conditions.

Meteorological Measurement Performance Specs

Humidity Accuracy:0 - 90 %RH: ±3 %RH; 90 - 100 %RH: ±5 %RH

Humidity Resolution: 0.1 %RH

Temperature accuracy (at +68°F/20°C): ±0.5 °F (0.3 °C)

Temperature resolution: 0.1 °C / 0.1 °F

Pressure accuracy: ±15 hPa

Pressure resolution: 1 hP

The Orion AQM-PM measures PM1, PM2.5, and PM10 particulates. Includes the basic meteorological parameters of temperature, humidity, and barometric pressure.

Particle counter channels: PM1, PM2.5, PM10

Particle diameter range: 0.6 - 2.5 μm: PM 2.5

0.6 - 10 μm: PM 10

Sampling time: 1 min

Sampling interval: 10 min

Sample flow rate: 0.9 SLM

Measurement range: PM2.5: 0 - 1000 µg/m3

PM10: 0-2500 µg/m3

Resolution: 0.1 μg/m3

The Orion AQM-Complete measures:

  • Met parameters temperature, humidity, and barometric pressure
  • Gaseous pollutants
  • PM1, PM2.5, and PM10 particulates

See Gas and PM tabs above for detailed specs.

Data Viewing & Monitoring

Monitoring is accomplished via the MicroServer which offers a variety of Internet and industrial protocols, datalogging capability, and ports for additional sensors such as wind, solar radiation, and/or precipitation sensors. Data can be downloaded for archival and analysis.

FTP output (XML and CSV) • XML web service • Internet browser user interface

SNMP, Modbus/OPC and RTU communication protocols are standard for Industrial Management applications.

Compatible with CWOP (Citizen Weather Observer Program) and Weather Underground, the MicroServer can automatically post data from your weather station to these network websites.

Open MicroServer Page

AQM Plus MicroServer

Free with the Weather MicroServer, the Cloud-based Weather Server features real-time weather data monitoring that is easily accessible on the Internet. Users can view the display screen remotely from any device using a web browser.

Open Cloud-based Server Page

Air Quality Monitor RT Screen

Cloud Server AQM Plus Screen

Air Quality with Wind/Rain

Cloud Server AQM Plus with additional wind and rain sensors

Weather Master™ is our proprietary software optimized for CWS environmental monitoring stations. It provides computer monitoring, calculated parameters, graphing and trend displays, as well as automatic archiving of data, alarm notification, and web page updates.

Open WeatherMaster Software Page

Environmental Monitoring Software

Connection between sensor module and monitoring device

Included with the Orion AQM is a 50-foot section of sensor cable which connects to the Interface Module. Extra length RS-485 cable is available up to 1000 feet.

A standard 7-foot serial communication cable connects the Interface Module to the Weather MicroServer.

Catalog Number 8403-1

Utilizes a Sierra Wireless AirLink RV50 Industrial modem, shown in optional weatherproof enclosure (Catalog Number 88163). CWS configures to customer-provided cell service.

  • Ethernet interface.
  • Supported frequency bands: LTE, GSM/GPRS/Edge: Quad-band
  • Provides LTE broadband connectivity to remote locations and in harsh environments.
  • Ultra-low power consumption, ideal for solar or battery powered installations.
  • Built-in, class leading voltage transient protection provides superior reliability and continuous operation.
  • North American and International models available.
  • Carrier Approvals: Verizon, AT&T, Sprint, T-Mobile USA, US Cellular, Rogers, Bell, Telus
Cell Modem in Enclosure

Optional Weatherproof Enclosure (Catalog Number 88163) houses MicroServer, Interface Module, and Cell Modem.

Masts & Mounting Hardware

Due to the wide variety of installations, masts and mounting hardware are sold separately. The following items are available from Columbia Weather Systems. Click to expand for details.

10-ft steel mast comes in two five-foot sections that pressure-fit together, galvanized with a polymer clear coating. Catalog Number: 88005

(May be used with Roof or Wall Mount Kit below.)

Includes universal mast mount, guy wire clamp, guy wire, lag screws, and eye bolt screws.
Catalog Number: 88002

(Does not include mast - User supplied or select steel mast above)

Open Hardware Kit PDF including diagrams

Mount weather station mast on a roof

Roof Mount Hardware Kit
(Catalog Number 88002)

Includes 4" wall mounts with lag screws..
Catalog Number: 88003

(Does not include mast - User supplied or select steel mast above)

Open Hardware Kit PDF including diagrams

Mount weather station mast on side of building

Wall Mount Hardware Kit
(Catalog Number 88003)

This tripod mast is designed to provide 8 to 10 feet of stable, secure support for sensors or other instrumentation. Set up takes less than five minutes.

Competitively priced and sturdy, the tripod is constructed from welded aluminum and anodized for appearance and longevity. The 15-pound tripod can support up to 60 pounds of equipment on a 1" (outside diameter) vertical pipe stub.

Operational Features

  • Sturdy construction supports up to 60 pounds of equipment.
  • Legs insert easily into body and fasten securely with stainless steel retainer pins.
  • Guy wires clip quickly to feet for increased stability.
  • Includes tiedown kit for optional optimized stability.

Tripod Specifications

Capacity: Supports up to 60 lbs.
Diameter: 1" OD
Shipping Weight: 17lbs
Shipping Box Dimensions: 70" x 8" x 8"

Order Information

Tripod with Tiedown Kit, Catalog Number: 88019
Tripod Tote for storage and transportation, Catalog Number: 88009

Open Tripod Data Bulletin PDF

Weather Station Tripod Mast
Tripod Leg Joint
Tripod TieDown Kit

Universal mounting adapter to attach sensor module to existing towers or alternate masts, even those with multiple instruments. Can be used vertically or horizontally. Aluminum construction. Includes two clamps for mast of up to 3” diameter.

Catalog Number: 88022-1

(Does not include mast - User supplied)

Open Diagram PDF

Sensor Mount
Weather Station Mounting Adapter

Universal Mount for Tower/Mast (Catalog Number 88022-1) shown above with Orion Weather Station sensor head.


The following accessories are available. Surge protection with the Lightning Arrestor is highly recommended. Click a title to expand text for additional information.

Three-stage surge protector, for data and power signals.

A nearby lightning strike may induce a high voltage surge which the internal suppressor of your instrument may not be able to withstand, causing significant damage. Protect your investment with a Lightning Arrestor.

This compact transient overvoltage suppressor is designed for weather stations in areas with an elevated risk of lightning strike.

  • Superior 3-stage surge protection
  • Tolerates up to 10kA surge currents
  • Both differential and common mode protection on each channel
  • Filtering against HF and RF noise
  • Two power channels and two data channels
  • Environmental protection class IP66

Catalog Number: 8355-1

Includes adjustable mounting clamp.

Download Lightning Arrestor PDF

Lightning Arrestor

Plugs directly into the Ethernet Port on the Weather MicroServer.

Catalog Number: 8356

A weatherproof enclosure is available to house the Weather MicroServer and protect it from the elements.

Designed for use in indoor and outdoor settings, the enclosure can be used in highly corrosive environments typically found in oil refineries, chemical processing plants, waste water treatment, and marine installations.

Cables are routed through liquid tight strain relief fittings.


  • Molded fiberglass polyester has outstanding chemical and temperature resistance and exhibits excellent weatherability and physical properties.
  • Seamless foam-in-place gasket assures watertight and dust-tight seal
  • Polyester mounting feet and stainless steel attachment screws are provided with each enclosure.
  • The quick-release, corrosion-resistant polyester latches are located in corners which allow unobstructed access to enclosure.

Overall Size:
L 10 x W 8 x H 6 inches (254 x 203 x 152mm)

To fully power monitoring stations in applications that do not have access to electricity, we offer solar panels. These are custom per installation based on geographical location. Most common are 20 and 40-watt systems.

Catalog Number: 83000


  • solar panel
  • controller
  • mounting adapter
  • battery and battery enclosure
Solar Power Panels

In addition to the standard one-year warranty, which is included with the purchase price, we offer standard factory warranty extensions on all weather station components in additional one-year increments up to a maximum of five years.

The Free One-Year Standard Factory Warranty and the Extended Standard Factory Warranty do not cover damage due to normal wear and tear, exceptional operating conditions, negligent handling or installation, or unauthorized modifications.

Warranty options can only be purchased with new orders.

Catalog Number: 85110

The battery back-up option provides continuous power to the monitoring system in the event of an electrical outage. The 12VDC battery comes in a NEMA enclosure and can power a non-heated system for up to three days.

Catalog Number: 8395-1
Enclosure Size: 12" x 10" x 6"
Enclosure: 16 gauge galvanized steel with polyester power finish
Industry Standards: NEMA/EEMAC Type 3R
Battery: 28 AHr Sealed Lead Acid Rechargeable
Power Input: 88 - 264VAC
Power Output: 12VDC

Battery Backup

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