Mobile sensors are highly sought-after for multiple
applications. For example, in firefighting or CBRN disaster
control the presence of acidic and alkaline gases, such as
hydrogen chloride and ammonia, poses a significant threat to
personnel, demanding fast responding mobile sensors. However,
current gas sensors are often costly and react specifically to
individual analytes, making them unsuitable for non-specialized
first response units. This study presents a novel approach using
a cost-effective and user-friendly gas sensor with direct electrical
readout. It is based on a hygroscopic polyethylene glycol (PEG)
layer on miniaturized interdigitated electrodes. The adsorbed
water in the polymer rapidly undergoes pH changes upon
exposure to pH-changing vapors, leading to a drastic change in
conductivity of the PEG. The experimental results demonstrate
the sensor's ability to detect relevant concentrations of pHaltering
gases, with a response time comparable to commercial
sensors.
«Mobile sensors are highly sought-after for multiple
applications. For example, in firefighting or CBRN disaster
control the presence of acidic and alkaline gases, such as
hydrogen chloride and ammonia, poses a significant threat to
personnel, demanding fast responding mobile sensors. However,
current gas sensors are often costly and react specifically to
individual analytes, making them unsuitable for non-specialized
first response units. This study presents a novel approach using...
»