Turnkey Instruments Ltd

An important aspect of Turnkey Instruments' work is our range of environmental monitors. These are primarily for measuring levels of dust and other airborne particulates, though also record ambient temperature and relative humidity, and wind speed and direction using an attachable anemometer. The Topas and Osiris's external inputs in principle allow anything to be recorded along with dust measurements, given an appropriate detector. Commonly, these can be sound meters, gas sensors, rainfall gauges and traffic counters.

The monitors use a light scattering technique to measure different dust particle sizes simultaneously, recording TSP, PM₁₀, PM_2.5 and PM₁ fractions. Both the Topas and Osiris monitors have been awarded the Environment Agency's MCERTS certification, which ensures reliable and accurate recording of PM₁₀ data. More information on how they work can be found in our Air Particle Monitor FAQs document.

The instruments can be operated either directly, or via a computer using our AirQ software. This can communicate with an instrument connected locally, or over a radio or GSM phone link, and also enables collection, manipulation and presentation of the instrument data. Additionally, alerts can be sent by SMS when measured levels exceed a set limit.

• Fixed station monitor housed in a stainless steel wall box.
• Inputs for wind and external sensors.
• Accessible by radio or GSM modems for remote sites.

• Portable or semi-permanent installation.
• Inputs for wind and external sensors.
• Accessible by radio or GSM modems for remote sites.

• Portable, hand-held monitor.
• Can be used to locate workplace dust sources.
• Can identify high pollution vehicles at road side.

• Wind measurement and additional detector inputs.
• GSM and radio modems.
• Power packs and connectors.
• SMS alert service.

• Download data from Topas, Osiris and DustMate.
• Control instruments remotely.
• Search database of results – create graphs and reports.