CDT2000

Multifunctional CO2 transmitters for building automation systems

CDT series air quality transmitters are engineered for building automation systems in the HVAC/R industry. The CDT series measures carbon dioxide (CO2) utilizing the industry standard NDIR measurement principle, and temperature (T). Optional relative humidity (rH) measurement is also available in the same device. CDT series devices are available with large touchscreen display making configuration of the device quick and easy.

The CDT2000 series transmitters calibrate themselves automatically using ABCTM logic. The ABCTM logic requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT2000-DC is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT2000-DC is also suitable for buildings that are continuously occupied.

CDT series devices include:
• Separate field configurable output for each measurement parameter (CO2, rH, T)
• Proportional output options including: voltage (0–10 V, 2–10 V) and current (4–20 mA)

CDT series device options offer:
• 2” x 3” touchscreen display
• Field configurable relay for any of the three parameters
• Modbus configuration

 

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Applications

CDT series devices are commonly used to monitor:

• CO2 and humidity levels in offices, public spaces, meeting rooms and classrooms
• CO2 levels of return air in ventilation systems
• incoming air and return air humidity levels in ventilation system
• humidity in various industrial applications
• temperatures in HVAC/R environment
• CDT2000-DC series devices can also be used in applications where there is a constant source of carbon dioxide present (for example hospitals and greenhouses)

Specifications

Performance

Measurement range:
CO2: 400–2,000 ppm
Temperature: 32−122 °F
Relative Humidity: 0–90 %
Accuracy:
CO2: ±40 ppm + 2 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater)
Temperature: <0.9 °F
Relative Humidity: ±4 % max @32−122 °F and 0–90 % rH
Total error band includes accuracy, hysteresis and temperature effect over 41–122 °F and
10–90 % rH.

Technical Specifications

Media compatibility:
Dry air or non-aggressive gases
Measuring units:
ppm, °F and %
Measuring element:
CO2: Non Dispersive Infrared (NDIR)
Temperature: Pt1000
Relative Humidity: Thermoset polymer capacitive
sensing element
Environment:
Operating Temperature: 32−122 °F (0−50 °C)
Storage Temperature: -4−158 °F (-20−70 °C)
Humidity: 0 to 95 % rH, non condensing

Physical

Case:
Dimensions: 3.93” x 3.57” x 1.26” (99.87 x 90.75 x 31.99 mm)
Weight: 4.82 oz (150 g)
Mounting:
3 screw holes slotted, 11/64” ø (3.8 mm)
Materials:
Case: ABS (UL 94 V-0 Approved)
Protection standard: IP20
Display (Optional)
Touchscreen
Size: 3.05” W x 2.06” H (77.4 x 52.4 mm)
Electrical Connections:
Power Supply: 5-screw terminal block
(24 V, GND, CO2, rH, Temp)
12–24 AWG (0.2–1.5 mm2)
Relay Out: 3-screw terminal block
(NC, COM, NO)
12–24 AWG (0.2–1.5 mm2)

Electrical

Input: 24 VAC or VDC, ±10 %
Current consumption: max 90 mA (at 24 V) + 10 mA for each voltage output or 20 mA for each current output
CO2 Output signal:
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
4–20mA, R<500 Ω
Temperature Output signal:
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
4–20 mA, R<500 Ω
Relative Humidity Output Signal:
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
4–20 mA, R<500 Ω
Relay Out:
3-screw terminal block
(NC, COM, NO)
12–24 AWG (0.2–1.5 mm2)
SPDT Relay, 250 VAC / 30 VDC / 6 A

Conformance

Meets requirements for CE marking:
EMC Directive: 2014/30/EU
RoHS Directive: 2011/65/EU
LVD Directive: 2014/35/EU
WEEE Directive: 2012/19/EU

Model summary

CDT2000 CDT2000-rH
Description Model# Part# Description Model# Part#
Carbon dioxide transmitter for room CDT2000 10001 Carbon dioxide and humidity transmitter for room CDT2000-rH 10009
– with display CDT2000-D 10002 – with display CDT2000-rH-D 10010
– with relay and display CDT2000-1R-D 10003 – with relay and display CDT2000-1R -rH-D 10011
– with Modbus configuration and display CDT-MOD-2000-D 10004 – with Modbus configuration and display CDT-MOD-2000-rH-D 10012
-with Modbus configuration, relay and display CDT-MOD-2000-1R-D 10005 -with Modbus configuration, relay and display CDT-MOD-2000-1R-rH-D 10013
– with dual channel sensor CDT2000-DC 10207 – with dual channel sensor CDT2000-DC-rH  10212
– with dual channel sensor, and display CDT2000-DC-D 10208 – with dual channel sensor, and display CDT2000-DC-rH-D  10213
– with dual channel sensor, relay and display CDT2000-DC-1R-D 10209 – with dual channel sensor, relay and display CDT2000-DC-1R-D  10214
– with Modbus configuration, dual channel sensor and display CDT-MOD-2000-DC-D 10210 – with Modbus configuration, dual channel sensor and display CDT-MOD-2000-DC-rH-D  10215
– with Modbus configuration, dual channel sensor, relay and display CDT-MOD-2000-DC-1R-D 10211 – with Modbus configuration, dual channel sensor, relay and display CDT-MOD-2000-DC-1R-rH-D  10216