The PolySense team has just published a new article on Sensors MPDI journal (IF 3.5) reporting on the development of compact electronic modules for a QEPAS sensor. A very low-noise, fully differential preamplifier for the quartz tuning fork, with digital output and
programmable gain, has been designed and realized. A compact FPGA board hosts both an accurate function generation module, which synthesizes the signals needed to modulate the laser source, and an innovative lock-in amplifier based on the CORDIC algorithm. QEPAS
sensors based on the designed electronics have been used for the detection of H2O and CO2 in ambient air, proving the full functionality of all the blocks. These results highlight the potential of compact electronics to promote portable and cost-effective QEPAS applications.
The following link provides access to the article:
http://polysense.poliba.it/wp-content/uploads/2025/11/sensors-25-06718.pdf
