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TSI isn’t just a company that makes research instruments, we’re built on research. Our scientists and engineers are actively involved in partnerships and projects to advance knowledge. We work with and serve universities, colleges, R&D departments, government agencies, and...

TSI offers robust SMPS™ solutions for continuous, remote ultrafine particle monitoring, with both butanol- and water-based options tailored for various air quality compliance needs.

The Apex2 Plus offers enhanced performance, ensuring it can handle even the most demanding personal monitoring applications. With a flow rate up to 5L/min, the Apex2 Plus models offers enhanced features like duration timers, Bluetooth connectivity, enabling real-time data and...

The Apex2 Pro version offers the highest level of monitoring with flows to 5L/min. Featuring all the capabilities of the Standard and Plus models, the Apex2 Pro adds datalogging of flow, pressure and motion, aswell as programmable on and off timers. Remotely monitor and...

Casella Air Sampling Pumps enable efficient and accurate air sampling for a variety of industrial and environmental applications.

TSI's filter test solutions are used to comply with various testing standards and regulations around the globe.

All TSI gas mass flow meters integrate flow, absolute pressure, and temperature sensors to deliver readings and compensate flow measurements.

When your application requires measuring particle sizes above a micrometer, TSI has four options for you to consider. Our ‘supermicron-capable’ family of instruments includes optical and aerodynamic techniques for measuring particles in this size range.

TSI cascade impactors can collect particles with aerodynamic diameters (cutpoints) from 10 nm to 10 µm, in 3 to 13 different size fractions, and at flow rates of 2, 10, 30 or 100 L/min.