Series CDT Carbon Dioxide Transmitter

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General Specifications

Series CDT Wall Mount Available Now, Duct and OSA Available Summer 2011

Range: 0 to 2000 PPM or 0 to 5000 PPM

Accuracy: +/- 3 % of reading +/- 40 PPM

Output: Field Selectable 0 to 10(5) VDC / 4 to 20 mA for CO2 and Temperature

Optional Passive Temperature Outputs via Separate Terminal Board for Wall Mount

Optional Relay for CO2

General Specifications

Sensor Type: Non-Dispersive Infrared

Single Beam Dual Wavelength Technology

Self Corrects for Drift Due to Light Source

Aging

Field Calibration Using Calibration Kit

(Dwyer Calibration Gas Tanks Available For

Sale in Approved Countries)

NDIR Sensor Technology

NDIR Sensor Technology Single Beam – Single Wavelength

Telaire, Sense Air (ACI, Greystone, Thermokon, and Veris use Telaire or Sense Air Sensor Modules)

Single Light Source and Single Receiver with ABC Logic Self Calibration

Advantages: Lowest Cost Solution

Acceptable Accuracy For Most Applications

Disadvantages: Can’t Calibrate Itself in Buildings Occupied 24hrs / day

Additional Error from Logic 400 PPM Assumption

NDIR Sensor Technology

Dual Beam – Single Wavelength

E+E, Vulcain (Honeywell Owned), Siemens

Two Light Sources and Single Receiver Using

Second Light Source as Reference

Advantages:

Can Self Calibrate In Occupied Buildings

Less Expensive Sensor

Disadvantages:

Doesn’t Account for Aging of Second Light Source

NDIR Sensor Technology

Single Beam – Dual Wavelength Dwyer, Vaisala

Single Light Source With Two Wavelength Filters Where One Filter Monitors the Light and Other Measures CO2

Advantage: Self Calibrates in Occupied Buildings

Calibration Monitors Actual Light Aging Effect

Disadvantage: Most Expensive Of Sensor Technologies

Features and Benefits

Field Calibration with Jumper Lockout

Allows Qualified Users to Adjust Calibration to

Insure Most Accurate Sensor Possible

Eliminates Building Occupants from Mistakenly

Changing Calibration

Field Selectable Outputs

Eliminates Chance of Customer Ordering Incorrect

Models

Allows Transmitter to Work With Most BMS

Controllers

Features and Benefits

Terminal Block On Back Plate Customer Can Change Transmitter Without Requiring Electrician

Back Plate Can Be Installed Without Risk of Transmitter Being Damaged or Lost During Rough In

Local and Remote Display Allow Customer to Access Calibration and Set Up Menus

Can be Configured Not to Display CO2 for Daily Use

Same Remote Display for Whole BAS Wall Mount Family

Features and Benefits

On Board RTD Temperature Sensor Able to View Ambient Temperature on All Models

Large Vents in Housing Along With Placement of Sensor, Creates More Air Flow Across Sensor For Greater Accuracy

Optional Relay Can Turn On Fan In Case CO2 Level Too High

Field Selectable Engineering Units Universal Product Platform for US and Overseas Customers

Features and Benefits

Barometric Pressure Compensation Allows Users Above Sea Level to Correct For Barometric Pressure to Insure Most Accurate Reading

Output Scaling Allows Users to Achieve Greater Resolution by Using a More Custom Temperature and CO2 Range

Push Button Calibration Reduces Time it Takes to Calibrate Transmitters

Low Price

Applications

Carbon Dioxide

Transmitters are

used as an

indication of the

level of

occupancy in a

multiuse room

such as a

conference room

Application

Carbon Dioxide

Transmitters are

commonly used in

schools to insure

enough fresh air is

being supplied to the

classrooms

Applications

Carbon Dioxide

Transmitters are

used in underground

parking Garages in

areas where diesel

engine vehicles are

prevalent

Questions

To order a free catalog or for more information contact;

Dwyer Instruments, Inc., P.O. Box 373,

Michigan City, IN., 46361

Telephone: (800) 872-9141 or (219) 879-8000

Fax: (219) 872-9057

Internet address: www.dwyer-inst.com

E-mail: info@dwyer-inst.com