top of page

Topas Airborne Particulate Monitor

Topas Dust Monitor
Topas Dust Monitor
Topas Dust Monitor

Topas (Turnkey Optical Particle Analysis System) is a fixed station monitor designed to continuously record environmental   TSP, PM10, PM2.5 and PM1 particles. Topas has achieved the Environment Agency's MCERTS certification, ensuring its accuracy in recording data.

The instrument is housed in a compact, unobtrusive stainless steel wall box with IP66protection. Inlet heating is fitted as standard. All controls and displays are located behind a lockable door.

Several sites can be networked together to form a city wide monitoring system. Sites can be connected by radio, telephone or GSM modems, internet connection or fixed wiring and controlled by one PC using AirQ software.

Product Information

  • ​Topas will continuously indicate the concentration of TSP, PM10, PM2.5 and PM1 particles with a resolution of 0.1 micrograms per cubic metre. In its workplace mode, it will indicate inhalable, thoracic and respirable concentrations. Osiris has achieved the Environment Agency's MCERTS certification, ensuring its accuracy in recording data.

  • Real time air quality monitoring

  • Simultaneous TSP, PM10, PM2.5 & PM1

  • Multi-monitor networks

  • Spot monitoring, portable or permanent installations

  • Meteorological instruments 

  • Environmental Monitoring Software

  • AirQ the user friendly and quick reporting PC software, designed in-house will manage and display results from our range of environment sensors.

  • AirQ can be used to control sensors and record measurements in real time

  • “Live” graphs and tables appearing on the PC screen.

  • Software automatically starts and stops sensors.

  • Change parameters and configurations.

  • Upload stored results.

  • Powerful database engine.

  • With AirQ a live “on-screen” pollution rose can be created which plots measurements against wind direction on a polar chart.


  • Standard Inlet with TSP 1mm stainless steel mesh

  • Heated Inlet to 60oC

  • Turnkey Laser Nephelometer

  • Environmental Mode: Measurement of TSP, PM10, PM2.5 and PM1.0

  • Workplace Mode: Measurement of inhalable, thoracic and respirable.

  • Detection limit of 0.01 micrograms per cubic metre

  • Indicator Range of 0 to 60mg/m3

  • Particle size range of 0.5 to 20 micron diameter

  • Particulate counting with three size channels in particle per cc

  • Flow rate of 600cc per minute

  • Reference filter of 25mm diameter GFA circle

  • Operating temperature of -5oC to +50oC

  • Security with password protection

  • Alarms with siren, text to cellular phone, email and visual beacon

  • Internal data storage with separate battery backup

  • Averaging period of 1 second to 4 hours

  • Sampling current drain with heated inlet and backlight of 1.2A

  • External power pack of 80 to 240v AC

  • Meteorologicla inputs for windspeed, direction, rainfall, temperature and humidity

  • Wall or lamp post mountable steel box

  • Instrument and enclosure weight of 12kg

  • Power options of solar, wind, mains and battery

Comes With

  • Topas including mounting brackets

  • Standard inlet

  • Spare filters

  • Allen keys

  • Filter container bracket mounting kit

  • Software Licence

  • Lamp Post Box

  • Operating Instructions

  • Maintenance Book.

bottom of page