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

MSE Supplies is an authorized distributor of Gasera Products in the US. Please fill out the application questionnaire and contact us to discuss the application and configurations.

Introduction

The photoacoustic detector 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 and the depth profiling capabilities 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’s novel cantilever sensor, 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 this product a must-have accessory for every lab.
Photoacoustic spectroscopy directly measures a sample’s infrared absorption. The absorption of infrared radiation in the sample creates heat which is transferred into the surrounding gas and a photoacoustic signal is generated via thermal expansion. Thus the measurement is non-destructive and the signal is independent of the surface roughness. The measurement depth can be controlled by varying the mirror velocity or phase angle of detection, and thus depth-varying information can be obtained.
The heart of the system is the patented optical microphone comprising of a MEMS cantilever coupled with a laser readout interferometer that can digitally measure microscopic movements of the cantilever sensor, having a dynamic range greater that any analog circuitry can ever obtain.

Features

Measures solid, semi-solid and liquid samples.
Insensitive to sample morphology – hard crystalline materials or powders can be easily measured.
Highly absorbing “black” samples are well suited for the instrument due to the photoacoustic measurement principle.
Spectral range from UV to far-infrared.
Capability for depth profiling.
Sample space with the maximum sample size of 10 mm and 9 mm in diameter and height.
Automated purge gas control for nitrogen or helium.
Photoacoustic detector with cantilever enhanced optical microphone.
Patented ultra-sensitive optical microphone based on a MEMS cantilever sensor coupled with a laser interferometer to measure microscopic movement of the cantilever sensor.
Complies with the following standards or other standardization documents under the Low Voltage Directive 2006/95/EC and EMC Directive 2004/108/EC: EN 61326-1:2005, EN 61010-1: 2001.
12 months warranty

Applications

Dark samples
Pharma quality control
Soil samples
Paper and wood analysis
Oil analysis
Tissue and hair samples
Food analysis
Forensics
Cosmetics
Art conservation
Polymers
Paint and pigment analysis
Gemstones

Specifications

Product number	PA301
Dimensions (baseplate and fitting parts to FTIR not included)	17 cm W x 9,5 cm H x 18 cm D (6,7 in W x 3,8 in H x 7,1 in D)
Weight (baseplate and fitting parts to FTIR not included)	3.0 kg
Operational conditions	Temperature range: 15 °C – +35 °C
	Humidity range: Below 90% RH, non-condensing
	Pressure range: Ambient level
	Dust/water resistance: IP20 (IEC 529)
	Shock/vibration endurance: Strong vibrations can affect the measurement results
	Acoustic sensitivity: Loud sounds can affect the measurement results
Storage conditions	Temperature range: 0 °C – +60 °C
Sample requirements	Max size: 10 mm and 9 mm in diameter and height
	Sample cups available in two different sizes
	Sample cup material is aluminum

Purge gas connection	Connector type: Tube connector for 2,4 mm (i.d.) tube
Electrical connections	Power supply unit:
	Input voltage: 100 - 240 Vac, 50 - 60 Hz
	Input power max: 30W
Analog outputs	Output connectors: BNC
	Output signal voltage span: ± 3.3 V
	Output signal frequency band: Low pass filtered, 0-10kHz
	Output load: >2k resistive
Measurement specifications	Repeatability: 5% of measured value in operational conditions
	FTIR scan speed range: ~5 Hz – 30 kHz (HeNe frequency)
	Spectral range defined by window material, all common window materials are available
	Noise level of the detector: 2 µPa/sqrt(Hz)
	Microphone sensitivity: Approx. 10 V/Pa
Fits to following FTIRs	Bruker Tensor and Vertex series
	Thermo Nicolet 6700/8700, Nexus series, iS10 and iS50
	Perkin-Elmer Frontier, Spectrum One, Spectrum 100
	Varian/Bio-Rad 3000/4000/6000/7000
	Agilent/Varian 640/660/670/680
	Jasco FT/IR-4000/6000
	Shimadzu IRAffinity-1 /IRPrestige-21

Included in the package:

Gasera PA301 photoacoustic FTIR accessory
Optical microphone DSP unit
Required cables and parts for connecting to a specified FTIR instrument
Power supply unit
Accessory box (sample cups, sample holders, reference carbon black, tweezers, etc.)
User Manual
Storage case

Related Publications

J. Lehtinen, C. B. Hirchmann, R.L. Keiski, T. Kuusela, “Human Hair in the Identification of Cocaine Abuse with Cantilever-Enhanced Photoacoustic Spectroscopy and Principal Component Analysis”, Appl. Spectrosc. 67, 846-850, (2013)

J. Lehtinen, “Spectroscopic Studies of Human Hair, Nail, and Saliva Samples Using a Cantilever-Based Photoacoustic Detection”, Int. J. Thermophys., DOI 10.1007/s10765-013-1488-x, (2013)

J. Lehtinen, T. Kuusela, “Broadly tunable quantum cascade laser in cantilever-enhanced photoacoustic infrared spectroscopy of solids”, Appl. Phys. B, DOI 10.1007/s00340-013-5617-9, (2013)

FTIR Accessory

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

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