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Digital Control Systems

6475 SW Fallbrook Place Beaverton, OR 97008 USA

Toll Free: 1-877-468-6337

Phone: (503)246-8110

Fax: (503) 246-6747 


Model 308

Dual Beam


AirSense 308

PDF logo M308 Brochure

PDF logo M308Wall Installation

PDF logo M308 Duct Installation

All AirSense CO2 sensor are equiped with Dual Beam Bullet-Proof Performance!

Digital Control Systems’ AirSense™ Model 308 CO2 Sensor sets a new standard of affordability, ease of installation, and
user-friendly operation.
The Model 308 employs our patented single button calibration, which makes fi eld calibration a snap... but please do not
be disappointed if you never need to use this easy calibration feature, because the Model 308 is engineered to give you
the very best stability available in a low-cost PPM CO2 sensor!

About 15% lower cost! Reliability! Energy-Efficiency!

The AirSense Model 308 seamlessly
interact with your economizer to heat
and cool air, only when needed. Thus
it will save energy and reduces your
carbon footprint!

The AirSense Model 308 CO2 is our
lowest cost NDIR CO2 Sensor. With
the Model 308, you do not pay for
features that you do not need! Save
money, and save energy! This control
will pay for itself in no time!

All of our AirSense CO2 sensors feature
our exclusive new patented AdaptiveSense Technology (AST), ensuring unprecedented accuracy and stability.

It’s not just for CO2 sensing any more!
The AirSense™ Model 308 is the successor to our tried-and-true Model 310e. This next generation product allows you to order only those features you need, saving you money!

All these sensors are now available for very little cost!  Win more bids with the versatile and inexpensive Model 308!

Made in America
AirSense always has been, and always will be made in America!

18 months



Operating Principle

Non-dispersive infrared (NDIR)

Gas Sampling Method


Measurement Range

0-2000 ppm Standard (Other ranges available by request)


± 20 ppm CO2

Measurement Accuracy

± 30 ppm ± 2% of reading

Recommended Calibration Interval

Not required with AST

Warm Up Time

Less than 1 minute

Power Requirements

18 - 30 VDC or 20 - 28 VRMS AC

Power Consumption

Less than 1 watt

Operating Temperature Range

0 - 50° Celsius

Operating Humidity Range

5 - 95% RH, non-condensing

Voltage Output (linear)

0 - 10 VDC full scale

Optional Current Output (linear)

4-20 mA (Rloop : 400 ohms maximum)


Single button

Case Dimensions

4.5" x 2.8" x 1" (116 x 72 x 25 mm) Wall mounting

Enclosure Material

White Satin Finish, ABS UL 94 V-O
Flammability Rated Plastic


Indoor Air Quality:
A guide for building owners and facility managers. Provides information about diagnosing indoor air quality problems. "Provides information about diagnosing indoor air quality problems."

IAQ for Schools:
Download a complete, practical plan to improve the air quality in schools.

Improve IAQ, While Saving Energy.
The use of CO2 sensors can save more than $1 per square foot of energy cost annually.

HVAC CO2 Sensors
  AirSense 310e
New AirSense 350
OEM CO2 Sensors
  AirSense 300
  AirSense 305
  AirSense 400