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Model-CDSN
CO2 Transmitter with Temp Monitoring, LEED® Certified, Universal Output
- Minimize inventory and save time by combining CO2 and temperature measurement, as well as DIP switch selectable current/voltage outputs
- Integral passive temperature reduces the number of devices mounted in the space
- Requires minimal maintenance with Automatic Baseline Correction (ABC) to account for sensor drift
- Reduce operation costs using a low energy, reliable, and repeatable CO2 sensor
- Simplify installation with backplate electrical connections
Model-CDSN
From
AUD
375.03
Product Overview
- Applications HVAC
- Carbon Dioxide Accuracy ± 40 PPM + 3% rdg
- Carbon Dioxide Concentration, Max 2000 ppm
- Carbon Dioxide Concentration, Min 0 ppm
- Carbon Dioxide Response Time 120 s (τ90)
- Display Type N/A
- Electrical Connection Screw Terminal
- Electrical Output 0 to 20 mA
- Enclosure Ratings IP30, NEMA Type 1
- Materials ABS
- Mounting Orientation N/A
- Operating Temperature, Max 122 °F
- Operating Temperature, Min 32 °F
- Output Detail Field selectable; Current: 4-20 mA or 0-20 mA; Voltage: 0-5 V, 1-5 V, 0-10 V, or 2-10 V
- Output Signal Current, Voltage
- Relative Humidity 0 to 85% RH Non-Condensing
- Sensor Life 15 Years
- Sensor Type NDIR
- Series ID Model-CDSN
- Storage Temperature, Max 158 °F
- Storage Temperature, Min -22 °F
- Supply Power Note ± 20%, 50/60 Hz
- Supply Power Type AC/DC
- Supply Voltage 24 Vac/Vdc
- Switch Type N/A
- Temperature Accuracy ± 1 °C
- Temperature Output Range N/A
- Voltage Output Range 0 to 5 V, 1 to 5 V, 0 to 10 V, 2 to 10 V
- Warm Up Time <2 mins Operational; 10 mins Max Accuracy
Supported Applications
The Dwyer Model CDSN Carbon Dioxide Transmitter monitors CO2 concentration and temperature in schools, office buildings, and other indoor environments. The series is designed to support LEED® certification efforts and energy savings initiatives through accurate environmental monitoring.
Operating Conditions & Performance
The Model CDSN utilizes a Non-Dispersive Infrared (NDIR) sensor with a documented life expectancy of 15 years. It measures CO2 concentration in the range of 0 to 2000 PPM and includes temperature monitoring capabilities.
Performance Specifications:
- CO2 Accuracy: ±40 PPM ±3% of reading (guaranteed after three weeks of continuous operation in intermittently occupied environments).
- Temperature Accuracy: ±1°C @ 25°C.
- Response Time: < 120 s (τ90).
- Warm-Up Time: Less than 2 minutes for operational status; up to 10 minutes required for maximum accuracy.
The transmitter operates in ambient temperatures from 32 to 122°F (0 to 50°C) and humidity levels of 0 to 85%, non-condensing. Storage temperature limits are -22 to 158°F (-30 to 70°C). The device includes digital barometric pressure adjustment.
Configuration Options
The Model CDSN features a universal output selectable via DIP switches, allowing configuration for various building management controllers. Electrical connections are made through screw terminals.
- Selectable Output Signals:
- Current: 4-20 mA or 0-20 mA
- Voltage: 0-5 V, 1-5 V, 0-10 V, or 2-10 V
- Power Supply: 24 VAC/VDC ± 20%, 50/60 Hz.
- Housing & Enclosure: ABS material with NEMA 1 (IP30) rating. The housing includes a security feature to reduce the likelihood of physical tampering.
The series supports passive temperature sensor options including Sensor A (10K Ω type 3 NTC thermistor), Sensor B (10K Ω type 2 NTC thermistor), and Sensor F (20K Ω NTC thermistor). Self-calibration requires exposure to normal, outdoor-equivalent carbon dioxide levels once every 30 days.
Key Product Differences
The Model CDSN is identified as a Carbon Dioxide Transmitter. The series includes CE approval and complies with California Proposition 65 requirements regarding cancer and reproductive harm warnings. Dimensions for the enclosure are listed as 4-1/2 in [114.30] height, 2-51/64 in [71.12] width (diameter), and 1-3/32 in [27.69] depth.
PDFs & Manuals
