Environmental monitor device with database

An apparatus comprising:

• a. a data bus;
• b. at least one processing unit connected to the data bus;
• c. an input/output interface;
• d. a communications interface connected to the data bus configured to communicate with at least one environmental sensor device comprising:
• i. at least one particle counter;
• and
• ii. at least one differential pressure sensor;
• and
• e. a memory comprising:
• i. a data segment comprising at least one database;
• ii. a computer readable instructions segment, the computer readable instructions configured to cause the at least one processing unit to:
• 1. collect sensor data from at least one environmental sensor device;
• 2. store at least some of the sensor data in at least one database;
• and
• 3. generate a report of sensor data that exceeds at least one threshold;
• and
• wherein the at least one processing unit employs, at least in part, sensor data from at least one particle counter and sensor data from at least one differential pressure sensor to determine an estimated flow of particles between two locations.