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A/CO2-R2-3K

Automation Components, Inc.
Carbon Dioxide (CO2) Sensor 0V ~ 5V, 0V ~ 10V, 4mA ~ 20mA
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Overview

The A/CO2-R2-3K is a wall-mounted carbon dioxide sensor utilizing Non-Dispersive Infrared (NDIR) technology for accurate indoor air quality monitoring. It features a versatile triple-output design supporting 0-5V, 0-10V, and 4-20mA signals, making it compatible with nearly any building automation or industrial control system. The unit includes an Automatic Baseline Correction (ABC) algorithm to ensure long-term stability and reduce maintenance requirements in occupied spaces.

Why Choose This Part

This sensor offers flexible power options, accepting 24VAC or 16.5VDC to 40VDC, and provides polarity protection to prevent damage during installation. The NDIR sensing element delivers +/- 3 percent accuracy over a 0 to 2,000 ppm range, while the ABC algorithm automatically compensates for sensor drift without manual calibration.

Applications

Demand Control Ventilation (DCV)
Optimizing HVAC fan speeds in schools and office buildings based on occupancy levels to reduce energy consumption.
Indoor Air Quality Monitoring
Continuous tracking of CO2 concentrations in high-occupancy areas like auditoriums, gymnasiums, and theatres.
Greenhouse Climate Control
Managing CO2 enrichment or ventilation in controlled agricultural environments to optimize plant growth.
Smart Building Automation
Integrating with BAS/BMS systems via standard 0-10V or 4-20mA analog inputs for automated environmental regulation.

Key Specifications

Type Carbon Dioxide (CO2)
Output 0V ~ 5V, 0V ~ 10V, 4mA ~ 20mA
Voltage - Supply 24VAC, 16.5VDC ~ 40VDC
Operating Temperature 0degC ~ 50degC

Getting Started

Installation involves mounting the ABS plastic housing to a standard wall junction box and wiring the 2-pin interface to a 24V power source. Configuration of the output signal type is typically handled via internal jumpers or dip switches to select between voltage and current modes. Ensure the sensor is placed in an area with representative airflow for the room, avoiding direct placement near supply vents or exterior doors.

Also Consider

SCD41 SENSensirion AG - A surface-mount CO2 sensor module for engineers designing their own custom PCB-level monitoring solutions.