Presentation Profile
Supercritical Fluid Cartridges for Calibration
Currently Scheduled: 10/14/2025 - 1:00 PM - 1:20 PM
Room: South Lobby
Main Author
Randall Shearer - Liquen Technologies
- Oscar Spichiger - Liquen Technologies
- Craig Williford - Liquen Technologies
- John Birks - Liquen Technologies
Abstract:
Liquen Technologies develops portable, affordable, and reliable tools for calibrating gas analyzers and sensors. Our patent pending technology takes advantage of the unique solvating and physical properties of supercritical fluids. When a cartridge is heated above its critical temperature of 31.1°C, CO2 becomes a supercritical fluid having a uniform density (single phase), making it possible to deliver constant concentrations of pollutant gases at trace (ppb and ppm) levels. CO2 cartridges produce ~4 times more gas volume than a pressurized cylinder of the same physical volume and pressure. Notably, nano and micron sized polystyrene latex microspheres are well dispersed and dynamically delivered.
