Group calibration of environmental sensors

A method of calibrating one or more candidate fine airborne particle sensors, the method comprising:

• placing a plurality of fine airborne particle sensors in a calibration chamber, wherein:
• the plurality of fine airborne particle sensors comprises:
• one or more candidate fine airborne particle sensors to be calibrated;
• and
• at least one reference fine airborne particle sensor, wherein the at least one reference fine airborne particle sensors is pre-calibrated;
• dispersing particles throughout the calibration chamber to expose the plurality of fine airborne particle sensors to known and measured fine airborne particle concentration states across a dynamic range, wherein the fine airborne article concentration states are measured by at least one of the plurality of fine airborne particle sensors;
• for each of the one or more candidate fine airborne particle sensors, classifying, by a calibration server that is in communication with the plurality of fine airborne particle sensors, the candidate fine airborne particle sensors into two or more classes based on fine airborne particle readings from at least the one or more candidate fine airborne particle sensors, wherein the two or more classes comprise an unacceptable class and an acceptable class;
• and
• for each of the one or more candidate fine airborne particle sensors classified as acceptable:
• determining, by the calibration server, calibration values for the one or more acceptable candidate fine airborne particle sensors, wherein the calibration values are determined based on the fine airborne particle readings from the one or more acceptable fine airborne particle sensors and the at least one reference fine airborne particle sensor;
• and
• transmitting, by the calibration server, the calibration values to the one or more acceptable candidate fine airborne particle sensors.

A method of manufacturing a candidate fine airborne particle sensor, the method comprising:

• placing the candidate fine airborne particle sensor and at least one reference fine airborne particle sensor in a calibration chamber, wherein the at least one reference fine airborne particle sensor is pre-calibrated;
• dispersing particles throughout the calibration chamber to expose the candidate fine airborne particle sensor and the at least one reference fine airborne particle sensor to known and measured particle concentration states across a dynamic range, wherein the fine airborne article concentration states are measured by at least one of the candidate fine airborne particle sensor or the at least one reference fine airborne particle sensor;
• determining, by a calibration server that is in communication with the candidate fine airborne particle sensor and the at least one reference sensor, whether the candidate fine airborne particle sensor is acceptable based on fine airborne particle readings from the candidate fine airborne particle sensor;
• and
• upon a determination that the candidate fine airborne particle sensor is acceptable:
• determining, by the calibration server, calibration values for the candidate fine airborne particle sensor, wherein the calibration values are determined based on the fine airborne particle readings from the candidate fine airborne particle sensor and the at least one reference fine airborne particle sensor;
• transmitting, by the calibration server, the calibration values to the candidate fine airborne particle sensor;
• and
• storing, by the candidate fine airborne particle sensor, the calibration values transmitted by the calibration server.