Add time:08/09/2019         Source:sciencedirect.com

We report the development of a distribution feedback (DFB (cas 15332-10-2)) laser sensor for high precision and high sensitivity detection of the early fire gas carbon monoxide (CO). This system relied on a continuous wave (CW), distributed feedback laser emitting at a wavelength of around 2.33 μm as excitation source. A 2f/1f wavelength modulation spectroscopy (WMS) strategy was adopted to isolate complex, overlapping spectral absorption features typical of ambient pressures and to achieve excellent specificity and high detection sensitivity. Allan-Werle deviation analysis was used to evaluate the long-term performance of the CO sensor system, and limit of detection (LoD) of 1.18 parts per million by volume (ppmv) was achieved while a measurement precision of 0.08 ppmv was observed with an optimal integration time of ∼205-s. As a field measurement, early fire detection of paper, cotton and pine wood were conducted, which verified the reliable and robust operation of the developed sensor.

We also recommend Trading Suppliers and Manufacturers of DFB (cas 15332-10-2). Pls Click Website Link as below: cas 15332-10-2 suppliers