A sensor device, system and method can generate a profile of one or more detected substances in an environment, receive monitoring data from one or more of a group of sensors, and assess whether a heat-not-burn device activity event has been detected. In various embodiments, the sensor device includes a particle detection sensor and a gas detection sensor and a profile for heat-not-burn device activity is established with a threshold of detected particles and/or gases. In various embodiments, the profile for heat-not-burn activity is established with a threshold of gases that is not to be met or exceeded in order to generate a positive heat-not-burn detection.