Smart-home hazard detector providing useful follow up communications to detection events

A hazard detector, comprising:

• a hazard sensor that measures amounts of a hazardous condition present in an ambient environment of the hazard detector;
• an output device that outputs information into the ambient environment of the hazard detector;
• and
• a processing system that comprises one or more processors, the processing system being in communication with the output device and the hazard sensor, the processing system being configured to:
• receive a first measurement of the first amount of the hazard present in the ambient environment of the hazard detector;
• set a mode of the hazard detector to a state indicative of a hazardous condition being present in the ambient environment of the hazard detector;
• receive a second measurement of a second amount of the hazardous condition present in the ambient environment of the hazard detector, the second amount of the hazardous condition being less than the first amount of the hazardous condition;
• determine that the second amount of the hazardous condition present in the ambient environment of the hazard detector is below a threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• track a time period during which the amount of the hazardous condition present in the ambient environment of the hazard detector has remained below the threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• determine that the time period has reached at least a threshold duration, during such time period the amount of the hazardous condition present in the ambient environment of the hazard detector having remained below the threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• and
• cause the output device to output an indication of the hazardous condition easing in response to the time period being at least the threshold duration.

A non-transitory processor-readable medium for a hazard detector, comprising processor-readable instructions configured to cause one or more processors of the hazard detector to:

• receive a first measurement of a first amount of a hazardous condition present in an ambient environment of the hazard detector;
• set a mode of the hazard detector to a state indicative of a hazardous condition being present in the ambient environment of the hazard detector;
• receive a second measurement of a second amount the hazardous condition present in the ambient environment of the hazard detector, the second amount of the hazardous condition being indicative of less of the hazard than the first amount of the hazardous condition;
• determine that the second amount of the hazardous condition present in the ambient environment of the hazard detector is below a threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• track a time period during which the amount of the hazardous condition present in the ambient environment of the hazard detector has remained below the threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• determine that the time period has reached at least a threshold duration, during such time period the amount of the hazardous condition present in the ambient environment of the hazard detector having remained below the threshold hazardous condition level while the mode of the hazard detector is set to the state indicative of the hazardous condition being present;
• and
• cause an indication of the hazardous condition easing to be output into the ambient environment of the hazard detector in response to the time period being at least the threshold duration.