Abstract: A method for increasing the accuracy of a humidity sensor is disclosed. The method comprises: receiving one or more first sets of humidity measurements from a humidity sensor over a period of time, when the humidity sensor is exposed a to a first gas sample having a known humidity level; determining a calibrating humidity measurement from the first sets of humidity measurements; receiving one or more second sets of humidity measurements from the humidity sensor over a period of time, when the humidity sensor is exposed to a second gas sample having an unknown humidity level; and for each second set, subtracting the calibrating humidity measurement from the humidity measurements.

Abstract: A method of an in-situ calibration of a chemiresistor sensor is disclosed. The method comprising: heating and/or cooling at least one chemiresistor sensor in a ?T° C., wherein the at least one chemiresistor sensor is assembled in a sensing device; receiving a first temperature signal indicative of temperature measurement from a temperature sensor located in the sensing device to the chemiresistor sensor; receiving a first signal from the chemiresistor sensor, and determining a mathematical correlation between the first temperature signal and the first signal. In some embodiments, the heating and/or cooling induces changes in the signal indicative of temperature measurement and the signal received from the chemiresistor sensor.

Abstract: A nanoparticle characterized by sensitivity to an analyte of interest and comprising a conductive core in contact with a plurality of first ligands and of second ligands bound to the conductive core is disclosed. Additionally, a chemiresistor sensor comprising the nanoparticles of the invention and a method of using thereof such as for detection of an analyte of interest in a gaseous sample are disclosed.