Jul 10, 2015

PA301 - Ultra-high performance photoacoustic detector for solid, semi-solid, and liquid samples

PA301 - Ultra-high performance photoacoustic detector for solid, semi-solid, and liquid samples

The PA301 photoacoustic FTIR accessory improves laboratory productivity and safety by enabling extremely versatile and rapid analysis of solid, semi-solid, and liquid samples in any form without sample preparation.

The insensitivity to sample surface morphology, the depth profiling capabilities, and contactless measurement provide wide applicability in many areas of chemical and biological research which no other single accessory can match.


Due to the ultra-high sensitivity of the Gasera novel cantilever sensor, high quality spectra can be obtained in just seconds unlike in other available photoacoustic accessories. In fact the PA301 is over 100x faster that other competing PA solutions in the market. Furthermore, ambient air can be used as the carrier gas to obtain a signal-to-noise ratio (SNR) that is still significantly better compared to other commercial photoacoustic detectors used with helium carrier gas.


The quickness and the ease of use make the PA301 a must-have accessory for every lab!



  • Dark samples (eg. bitumen, rubber, etc. -> get app note)
  • Pharma quality control
  • Soil samples (-> get app note)
  • Paper and wood analysis
  • Oil analysis
  • Tissue samples
  • Food analysis
  • Forensics
  • Cosmetics
  • Art Conservation
  • Polymeers
  • Paint and pigment analysis
  • Gemstones

PA301 photoacoustic FTIR accessory consists of:

  • Photoacoustic detector with focusing mirror
  • Optical cantilever microphone with built-in laser readout interferometer
  • Removable sample cups for solid, semi-solid, and liquid samples
  • Carbon black reference
  • Vibration isolated detector mounting
  • Digital Signal Processing -module
  • Power supply (+12 VDC)
  • Cables to connect the modules and to connect to the FTIR instrument
  • Gas connector for purge gas with automatic valve contol and built in flow meter
  • Detector manual
  • Storage case


  • Minimum detectable pressure variation in the PA301 sample cell: 2 μPa/√Hz  (RMS)
  • Microphone sensitivity: Approx. 10 V/Pa
  • Rapid sample change without breaking the purge seal
  • Analog interface: BNC cable to detector input on the FTIR
  • Analog output: +/- 3.3 VDC interferogram signal
  • DSP analog output gain range: 0.02 - 20 in 10 step
  • Spectral range defined by window material (from UV to far-IR)
  • Maximum sample size: 10 mm diameter, 9 mm height
  • Helium purge with automatic purge valve operation


PA301 product brochure

Technical notes

Depth profiling with Photoacoustic Spectroscopy

Comparison of photoacoustic accessory PA301 with ATR and DRIFTS

Application notes

Widely scanning infrared lasers for photoacoustic detection of solids: This application note demonstrates the use
of a broadly tunable external cavity quantum
cascade laser (EC-QCL) source in place of a
typical FTIR spectrometer in photoacoustic
detection of solid samples.
Identification of cocaine abuse from human hair samples with Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS)
Dark samples
Soil and Mineral samples
Analysis of Carbon-Rich Polymers (Pittcon 2013 poster)
Analysis of Thin Multilayered Polymer Films (Pittcon 2013 poster)


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PA301 - Ultra-high performance photoacoustic detector for solid, semi-solid, and liquid samples

Digital brochure

Digital brochure - Photoacoustic accessory detector for FTIR


Application NoteS

Versatile and rapid analysis of solid and liquid samples with Gasera's new FTIR accessory PA301


Analysis of dark samples with PA301 photoacoustic detector for FTIR


Measurement of soil and mineral samples with PA301 photoacoustic detector fro FTIR