AirSense™ Model 307

M307 Brochure

M307 Installation

Digital Control Systems' AirSense™ Model 307 Carbon Dioxide Sensor sets a new standard of affordability and user-friendly installation and operation. A uniquely-plated CO2 sensing cell ensures flawless performance in the most demanding HVAC environment. The Model 307's ease of installation and classic finish were designed to meet the needs of the cost-conscious HVAC contractor.

The AirSense™ M307 was designed to be installed on a standard electrical junction box in new construction projects, or it can be directly wall mounted. Installation is now easier than ever! The Model 307 can be installed with just two screws and none of the sensitive electronics are exposed during installation, eliminating costly accidents. Another unique feature of the Model 307 is that it is designed so that components will not be harmed if the unit is accidentally wired incorrectly.

Technicians in the field can now easily calibrate the AirSense™ Model 307 using a simple one-step calibration procedure (patent pending): simply remove the port cap, attached the 2000 ppm calibration gas (available from the factory), and press a single button. A green LED indicates that the calibration process is complete.

The AirSense™ Model 307 provides ease of installation, built-in circuit protection, versatility, and the only one-point calibration system (patent pending) on the market. All of these cost-saving features are supplemented by a sleek design and flexible configurations, including and optional 4-20mA current loop module.

Measurement output is via a 0 to 10V interface.

Specifications
Operating Principle	Non-dispersive infrared (NDIR)
Gas Sampling Method	Diffusion Only
Measurement Range	0-2000 ppm Standard (0-5000ppm Range Optional by Request)
Repeatability	± 20 ppm
Measurement Accuracy	± 5% of reading or 75 ppm, (whichever is greater)
Recommended Calibration Interval	5 years
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)
Calibration	4-20 mA (Rloop : 400 ohms maximum) Single button
Case Dimensions	4.5 x 2.8 x 0.9 inches
Enclosure Material	White Satin Finish, ABS UL 94 V-O Flammablility Rated Plastic

Indoor Air Quality:
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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.