doi:10.1088/0957-0233/18/11/026engIzquierdo, D.Puyol,M.Salinas,I.Alonso,R.Alonso,J.Dominguez,C.Garces,I.Dual-Wavelength Measurement System for Absorbance Chemical SensingART-2007-65130A novel compact dual-wavelength measurement system for absorbance chemical sensing incorporating digital lock-in amplifiers is reported. Its main innovation is the introduction of a reference wavelength to correct the possible non-specific optical changes of the system. The performance of the instrumentation has been tested on a laboratory setup and with integrated optical absorbance sensors.2007http://zaguan.unizar.es/record/13123610.1088/0957-0233/18/11/026http://zaguan.unizar.es/record/131236oai:zaguan.unizar.es:131236MEASUREMENT SCIENCE & TECHNOLOGY 18, 11 (2007), 3443-3450by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess