A Wireless, Passive, Magnetically-soft Harmonic Sensor for Monitoring Sodium Hypochlorite Concentrations in Water

A Wireless, Passive, Magnetically-soft Harmonic Sensor for Monitoring Sodium Hypochlorite Concentrations in Water

Blog Article

A wireless, passive, remote-query sensor for monitoring sodium hypochlorite (bleach) solutions is reported.The sensor is comprised of a magnetically-soft ferromagnetic ribbon, coated with a layer of polyurethane and alumina, having a large and Finishes nonlinear permeability that supports higher-order harmonics in response to a time varying magnetic field.The hypochlorite ions induce swelling in the coating, with the resultant stress altering the harmonic signature of the sensor from which the sodium hypochlorite concentration can be determined.The wireless, passive nature of the sensor Needles and Syringes Accessories platform enables long-term monitoring of bleach concentrations in the environment.

The sensor platform can be extended to other chemical analytes of interest as desired.