Barometric pressure changes can affect the output of CO2 sensors, even putting them outside of their specified accuracy.
The BAPI unithas a built-in Barometric sensor that continuously compensates the output for accurate readings despite the weather or altitude of the installation.

For 0 to 2000 ppm units, the CO2 level is indicated as “Good, Fair or Poor” by three LEDs on the front of the unit.
If it reaches the top of the ppm range, the red LED will begin to flash.
A 60mm mounting base is also available to fit European style junction boxes.

POWER:
12 to 24 VDC, 240 mA
18 to 24 VAC, 12 VA peak
SENSING ELEMENTS:
Dual Channel Non-Dispersive Infrared (NDIR)
FIELD SELECTABLE VOLTAGE OUTPUT:
0 to 5 or 0 to 10 VDC
TERMINATION:
3 Terminals, 16 to 22 AWG
ENVIRONMENTAL OPERATING RANGE:
Temperature: 0 to 50°C
Humidity: 0 to 95% RH, non-condensing
ENCLOSURE MATERIAL & RATING:
ABS Plastic, UL94 V-0
CO2 DETECTION RANGE:
0 to 2,000 ppm
START UP TIME:
Less than 2 minutes
RESPONSE TIME:
Less than 2 minutes for 90% step change typical (after start-up)
MOUNTING:
Universal backplate (screws provided)
CO2 DRIFT STABILITY:
<5% of full scale over life of product
CO2 ACCURACY:
400 to 1,000 ppm: ±75 ppm or >1,000 ppm: ±10% of reading
LED CO2 LEVEL INDICATOR:
Good, Green < 1,000 ppm
Fair, Yellow = 1,000 to 1,500 ppm
Poor, Red > 1,500 ppm