Aspirating pathogen detection system

A method of operating an aspirating detection system, the aspirating detection system comprising:

• a network of one or more pipes for sampling air from a plurality of locations monitored by the aspirating detection system;
• a plurality of sensor units, each sensor unit comprising a housing fluidly connected to the network of one or more pipes;
• and one or more aspirators configured to draw airflow through the network of one or more pipes and through the sensor units;
• wherein the plurality of sensor units comprises:
• a first sensor unit comprising a first housing fluidly connected to the network of one or more pipes, and a sensor mounted within the first housing;
• and a second sensor unit comprising a second housing fluidly connected to the network of one or more pipes, a biosensor mounted within the second housing, and an air control device mounted within the second housing;
• the method comprising:
• drawing a plurality of air samples from a plurality of locations into the network of one or more pipes that direct the air samples to the plurality of sensor units;
• monitoring for one or more of:
• the presence of smoke, the presence of carbon monoxide, the presence of ammonia gas, the presence of hydrogen gas, the presence of chlorine gas, the presence of oxygen, the presence of methane gas, and the presence of sulphides in the plurality of air samples using the sensor of the first sensor unit;
• and
• monitoring for the presence of a pathogen in the plurality of air samples using the biosensor of the second sensor unit, wherein monitoring for the presence of a pathogen in the plurality of air samples comprises using the air control device, mounted within the housing of the second sensor unit, to provide a separate regulated airflow to the biosensor, wherein the airflow speed of the airflow provided to the biosensor is slower or faster than the total airflow speed of the airflow through the second sensor unit;
• wherein the plurality of sensor units are arranged in series having an inlet of one of the plurality of sensor units connected to an outlet of an upstream and adjacent sensor unit.

A method of adapting an existing aspirating detection system to monitor for the presence of a pathogen, the existing aspirating detection system comprising a network of one or more pipes for sampling air from a plurality of locations monitored by the aspirating detection system;

• a first sensor unit comprising a first housing fluidly connected to the network of one or more pipes and a sensor mounted within the first housing and configured to monitor for one or more of:
• the presence of smoke, the presence of carbon monoxide, the presence of ammonia gas, the presence of hydrogen gas, the presence of chlorine gas, the presence of oxygen, the presence of methane gas, and the presence of sulphides;
• and one or more aspirators configured to draw airflow through the network of one or more pipes and through the first sensor unit, the method comprising:
• fluidly connecting a second housing of a second sensor unit to the network of one or more pipes of the aspirating detection system, the second sensor unit comprising:
• a biosensor mounted within the second housing and configured to monitor for the presence of a pathogen, and an air control device mounted within the second housing and arranged to provide a separate regulated airflow to the biosensor, wherein the airflow speed of the airflow provided to the biosensor is slower or faster than the total airflow speed of the airflow through the second sensor unit;
• wherein the first sensor unit and the second sensor unit are arranged in series having an inlet of one of the plurality of sensor units connected to an outlet of an upstream and adjacent sensor unit.