hydrogen peroxide monitor
peroxide gas
http://www.rmprocesscontrol.co.uk/Electrochemical-sensors/Hydrogen-Peroxide-Probe.htm
http://www.rmprocesscontrol.co.uk/Electrochemical-sensors/Disinfection%20Probes.PDF
http://www.uwstout.edu/lib/thesis/2002/2002bostwicks.pdf
http://www.yesinc.com/products/data/al2021/index.html
http://guided-wave.com/products/peroxide/