Table 1.

Sensor package components

Item	Model name	Manufacturer	Range	Accuracy	Power Consumption	Weight (grams)	Dimensions (mm)
CO2	DX6220 OEM Model	RMT Ltd, Moscow, Russia	0 – 20%	20 (ppm) / 1%b	700 mA (max) @ 8–15V	180	42×73×92
CO	EC4–500-CO	SGX Sensortech Ltd., High Wycombe, Buckinghamshire, UK	0–500(ppm)	0.5 (ppm) / 4.9%a	3 mA @ 5Vc	5	20×73×21
PM2.5 Pump	Micro air pump (C120CNSN)	Sensidyne LP, St. Petersburg, FL, USA	0–11 (L/min)	N/A	550 mA (max) @ 12 V	290	88×54×52
Tenax Pump	Micro air pump (3A120CNSN)	Sensidyne LP, St. Petersburg, FL, USA	0–625 (cc/min)	N/A	26 mA (max) @ 12V	30	28×15×41
PM2.5	Personal environmental monitor (761–203B)	SKC, Inc., Eighty Four, PA, USA	N/A	N/A	N/A	53	64×64×22
VOC	Tenax TA 35/60 (29530-U)	Supelco, Inc., Bellefonte, PA, USA	N/A	N/A	N/A	1	6×6×89
Temperature	K-type thermocouple with amplifier	Adafruit, New Y ork, NY, USA	−25–400 (°C)	±2 (°C)b	<0.2 mA @ 5V	1.1	20×16×2
Pressure	HSC pressure sensor (HSCDRRN001ND2A5)	Honeywell International Inc., Morris Plains, NJ, USA	−1”−1” (H2O)	±0.25%b	3.5 mA @ 5V	2	10×13×11
Power	G8 Pro Lite+ 25C	Advance energy Inc., Las Vegas, NV, USA	N/A	N/A	1350 mAh @14.8V	126	26×34×102
Positioning	Ultimate GPS module	Adafruit, New Y ork, NY, USA	Global	< 3 (m)b	20 mA @ 2.2–5V	8.5	26×35×7
Communication	Xbee S1B	Digi International, Inc., Minnetonka, MN, USA	0–1,600 (m)d	N/A	250 mA @ 3.3V	4	24×33×4
Microcontroller	Teensy 3.1	PJRC LLC, Sherwood, OR, USA	N/A	N/A	12–50 mA @ 5V	4	36×18×5

^aLaboratory tested

^bManufacturer reported

^cIncluding the amplifying circuit.

^dOutdoor line-of-sight distance