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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 350

Dual Beam


AirSense 350

PDF logo M350 Series Brochure

PDF logo M350Wall Installation

PDF logo M350 Duct Installation

PDF logo M351-M355 Wall Installation

PDF logo M351-M356 Duct Installation

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

The new AirSense™ Model 350 delivers reliable and hassle-free carbon dioxide (CO2) sensing. You know us as a leader in CO2-sensing, but the Model 350 is the strongest, most reliable, and most versatile product we have ever offered! 

This unit can be used in LEED applications!

The Model 350 employs our patented single button calibration, which makes field calibration a snap... but please do not be disappointed if you never need to use this easy calibration feature, because the Model 350 is engineered to give you the best stability available in a low-cost PPM CO2 sensor!

About 15% lower cost! Reliability! Industry-leading

The AirSense™ Model 350 CO2 sensor does more for less! Priced far below the cost of its predecessor, the Model 350 offers expanded versatility for a lower price!

The AirSense™ Model 350 draws less energy than previous generations of CO2 sensors! This is thanks to our integrated Power Management Software, which operates with such efficiency that you will save money and reduce your carbon footprint!

The AirSense™ Model 350 comes standard with our AdaptiveSense Technology (AST), which reduces the long term drift that has characterized NDIR sensors up to now. Specifically designed to reduce service calls, the Model 350 sets a new standard for quality!

It’s not just for CO2 sensing any more!
The AirSense™ Model 350 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!

In addition, new features such as an:

  1. audible alarm,  
  2. humidity (RH) sensor, 
  3. carbon monoxide (CO) sensor, 
  4. volatile organic compound (VOC) sensor 

All these sensors are now available for very little cost!  Win more bids with the versatile and inexpensive Model 350!

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

Diffusion Only

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.

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