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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 308T

Dual Beam


AirSense 308

PDF logo M308T Brochure

PDF logo M308T Wall Installation

PDF logo M308T Duct Installation

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

• On-board temperature sensor included
• AdaptiveSenseTM Technology (AST), lifetime maintenance free calibration
• Signal Output can be 0-5V, 0-10V, or 4-20mA

Digital Control Systems’ AirSense™ 308T CO2 Sensor sets a new standard of affordability, ease of installation, and user-friendly operation. Included in all AirSense 308T is a temperature sensor, available in three different confi gurations.
1. 1,000 ohm platinum RTD
2. 10,000 ohm type 2 thermistor
3. 10,000 ohm type 3 thermistor

AirSense conservation AirSense Efficiency AirSense Performance
Energy-saver Reliability Accuracy

The AirSenseTM Model 308T seamlessly interact with your economizer to heat and cool air, only when needed. Thus it will save energy and reduces your carbon footprint! The standard integrated thermistor or RTD temperature sensor allows for easy output and is compatible with most HVAC systems.

The AirSenseTM Model 308T CO2 is our lowest cost NDIR CO2 and temperature sensor, it is designed for economy and ease of installation. With the Model 308T, 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.

AirSenseTM CO2 sensors are equipped
with our exclusive patented AdaptiveSense Technology (AST), ensuring unprecedented precision, stability and lifetime maintenance free calibration. AST employs DCS’ automatic calibration software to self correct, ensuring long term accuracy. For 24-hours occupancy facilities, chose the AirSenseTM model with 24-hour occupancy capabilities.

Get more for less!
The AirSenseTM Model 308T is the successor to our popular Model 308. The Model 308T is our lowest cost CO2 sensor with integrated temperature sensor designed for HVAC applications.
This next generation has one huge bonus: it is now available in a LOW COST duct-mounting format!

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