CO2

Digital Control Systems, Inc

AirSenseTM

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Digital Control Systems

7401 SW Capitol Hwy. Portland, OR. 97219 USA

Toll Free: 1-877-468-6337

Phone: (503)246-8110

Fax: (503) 246-6747

AirSense Model 301

Model 301 Manual

The AirSense™ Model 301 combines state of the art microprocessor technology with the solid reliability of Digital Control Systems' industrial products to make this full-featured air quality monitoring subsystem less complex and more robust than previous generations of instrumentation. It is so reliable we back it up with an unprecedented two year warranty: twice the industry standard.

    Advanced design provides a highly stable, drift-free output requiring less-frequent calibration. Voltage and current outputs make the Model 301 easy to interface with most advanced HVAC facility management systems. The optional contact closure output can directly control the system's fresh air damper to maintain C02 levels within preset limits.

    The Model 301 with Type-2 sensor is designed for demanding industrial and commercial applications that require reliable performance. With its broad range of input voltages, low power consumption and sturdy metal enclosures for either wall or duct mounting, this flexible monitor is easily incorporated into a broad range of applications.

    The simple one-point calibration procedure makes the Model 301 easy to maintain in the field. An optional digital readout showing C02 concentration in parts per million is also available.

Operating principle	Non-dispersive iinfrared (NDIR)
Gas sampling method	Diffusion or sample draw
Measurement range	0-2000 ppm C02
Maximum drift per year	± 75 ppm
Accuracy	± 5% of reading or ± 75 ppm, (the greater)
Repeatability	± 20 ppm
Minimum calibration interval	One year
Operating temperature range	10 to 45⁰ C
Power requirements	10-30VDC or 20-30VRMS AC
Power consumption	Less than 1.5 W
Calibration adjustments	Span only (offset electronically nulled)
Dimensions	6" x 5" x 2.5"
Voltage output (linear)	0 - 1VDC standard
Current output (linear)	4 - 20mA
Weight	Less than 2 lbs.
Enclosure material	Metal
Optional relay	8A at 220VAC/normally open or normally closed
Optional digital display	4-digit, .56" 7-segment LED
Operating life expectancy	10 years typical
Warranty	Two years, parts and labor through repair or exchange

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.