Indoor Air Quality Monitor

An indoor air quality monitor (“IAQ monitor”) comprising:

• a housing providing an air intake and an air outlet which communicate via a flow chamber;
• a fan arranged to propel air from the air intake to the air outlet via the flow chamber;
• at least one sensor for sensing at least one air pollutant, the sensor being exposed to air in the flow chamber and being configured to provide a sensor output indicative of air quality in the flow chamber;
• a microprocessor configured to receive and process the sensor output;
• and
• at least one wired or wireless interface device for outputting sensor data in digital form, and
• wherein the sensor is mounted on a carrier which is removably mountable within the housing, enabling the carrier to be withdrawn from the housing for replacement, servicing and/or calibration of the sensor.

An indoor air quality monitor (“IAQ monitor”) comprising:

• a housing providing an air intake and an air outlet which communicate via a flow chamber;
• a fan arranged to propel air from the air intake to the air outlet via the flow chamber;
• at least one sensor for sensing at least one air pollutant, the sensor being exposed to air in the flow chamber and being configured to provide a sensor output indicative of air quality in the flow chamber;
• a microprocessor configured to receive and process the sensor output;
• and
• at least one wired or wireless interface device for outputting sensor data in digital form, and
• wherein an interior of the housing is divided by an arrangement of air guides into (a) a first zone forming an air flow path from the air intake to the air outlet, the first zone including the flow chamber and containing the at least one sensor;
• and (b) a second zone which is isolated from the flow path, the second zone containing the microprocessor and the interface device.

An indoor air quality monitor (“IAQ monitor”) comprising:

• a housing providing an air intake and an air outlet which communicate via a flow chamber;
• a fan arranged to propel air from the air intake to the air outlet via the flow chamber;
• at least one sensor for sensing at least one air pollutant, the sensor being exposed to air in the flow chamber and being configured to provide a sensor output indicative of air quality in the flow chamber;
• a microprocessor configured to receive and process the sensor output;
• and
• an illuminable signal panel;
• and
• at least one electrically driven light source for illuminating the signal panel, wherein the hue and/or other visible quality of the light emitted by the light source is adjustable by the microprocessor, and
• wherein the signal panel comprising a panel of transparent of translucent material which is edge lit by the light source, and
• the microprocessor being further configured to adjust the quality of the light emitted by the light source in dependence on the categorisation of the air quality.