CDT-MOD-2000 Duct CO2 transmitters with temperature output for duct that use Modbus serial communication protocol

Product Details:

Equipment Type Duct CO2 Transmitter
Temperature Range -20 to +60C
Protection IP54
Connectivity Type RS485, Modbus RTU
Humidity % 0 to 85% RH (non-condensing)
Measurement Range CO2: 0~2000 ppm; Temperature: -20~+60C
Resolution 1 ppm (CO2); 0.1C (temperature)
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CDT-MOD-2000 Duct CO2 transmitters with temperature output for duct that use Modbus serial communication protocol Product Specifications

Power Consumption Max 1.2 VA
Sensor Type Non-dispersive infrared (NDIR)
Material ABS/PC plastic
Display Type LCD (Optional)
Diameter Probe diameter 19 mm
Accuracy 40 ppm +3% of reading (CO2); 0.4C (temperature)
Measurement Range CO2: 0~2000 ppm; Temperature: -20~+60C
Application Media Duct Air
Resolution 1 ppm (CO2); 0.1C (temperature)
Equipment Type Duct CO2 Transmitter
Temperature Range -20 to +60C
Power Supply 24 V AC/DC
Range 0 to 2000 ppm (CO2)
Protection IP54
Connectivity Type RS485, Modbus RTU
Humidity % 0 to 85% RH (non-condensing)

Product Description

CDT-MOD-2000 Duct series devices include:

Separate Modbus output for each measurement parameter (CO₂ and T)
Offset feature enabling field calibration for each measurement parameter (CO₂ and T)
Mounting flange
Clear backlit display

Specification

Communication:	RS-485 Modbus (RTU)
Accuracy:	CO2: 40 ppm + 2 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater) Temperature: <0.5 C
Measurement elements:	NTC10k temperature sensor, Non Dispersive Infrared (NDIR) CO2 sensor
Measuring units:	ppm, C
Calibration:	Automatic self-calibration, ABC LogicTM or continuous comparison (DC)
Supply voltage:	24 VDC/VAC 10 %
Current consumption:	max 230 mA (at 24 V) + 10 mA for each voltage output
Output signal 1:	0/25/10 V (linear to CO2), L min 1 k
Output signal 2:	0/25/10 V (linear to T), L min 1 k
Operating temperature:	0+50 C
Protection standard:	IP54

Advanced CO2 and Temperature Monitoring for Ducts

CDT-MOD-2000 provides precise CO2 and temperature readings directly within duct air systems, making it ideal for centralized building management. Its NDIR sensor technology ensures accurate long-term monitoring, while the optional LCD display enables quick status checks right at the installation site. With a protective flange-mount for easy duct integration, this device delivers seamless measurements to enhance indoor air quality and energy efficiency.

Flexible Communication & Output Options

Integrating CDT-MOD-2000 is simple, thanks to its Modbus RTU (RS485) connectivity, which allows real-time data exchange with control panels. The transmitter also supports optional analog outputs, including 0-10V or 4-20mA for temperature, making it suitable for diverse HVAC systems. Clearly marked screw terminals accept up to 1.5 mm2 wires for secure electrical connections during installation.

Reliable and Robust Construction

With an IP54-rated ABS/PC plastic housing, the CDT-MOD-2000 withstands challenging duct environments. It operates across wide temperature and humidity ranges, remaining stable even in fluctuating conditions. Its low power consumption and rapid response times reduce maintenance requirements, while its compact design enables installation in confined spaces.

FAQ's of CDT-MOD-2000 Duct CO2 transmitters with temperature output for duct that use Modbus serial communication protocol:

Q: How is the CDT-MOD-2000 duct CO2 transmitter installed in a duct system?

A: The CDT-MOD-2000 is designed for direct duct mounting using its integrated flange, ensuring secure placement and optimal exposure to duct air. The probe fits into a standard duct with a 19 mm diameter, simplifying installation for service providers and suppliers.

Q: What communication protocol does the CDT-MOD-2000 support?

A: This transmitter communicates using the Modbus RTU protocol over RS485 connectivity. This provides reliable serial data transmission, easy system integration, and compatibility with various building management systems common in the Indian market.

Q: When does the CDT-MOD-2000 reach optimal operational performance after power-on?

A: The device requires a warm-up time of less than three minutes after startup, after which it delivers accurate CO2 and temperature readings with a response time of under 60 seconds for changes in air quality within the duct.

Q: Where can the CDT-MOD-2000 be used?

A: It is suitable for installation in HVAC ventilation ducts across commercial, industrial, and institutional buildings. Its wide temperature range and IP54 protection ensure reliable operation in diverse Indian climates and environments.

Q: What is the process for connecting electrical wires to the CDT-MOD-2000?

A: Electrical connections are completed using screw terminals designed for wires up to 1.5 mm2. This method ensures firm attachment and straightforward wiring during installation or maintenance.

Q: How does using the CDT-MOD-2000 benefit building management systems?

A: Deploying the CDT-MOD-2000 enhances indoor air quality monitoring, providing accurate CO2 and temperature data for optimized ventilation and energy efficiency. Its robust outputs facilitate easy integration with automation panels, benefiting distributors, exporters, and building service providers.

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