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A/CO2-R2SO-20K-A03-G5 CO2 Room Sensor

MPN: A/CO2-R2SO-20K-A03-G5
Automation Components, Inc.
Carbon Dioxide (CO2) Sensor 0V ~ 5V, 0V ~ 10V, 4mA ~ 20mA
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Overview

The A/CO2-R2SO-20K-A03-G5 is a wall-mounted carbon dioxide sensor designed for monitoring indoor air quality in commercial and industrial HVAC environments. It features a measurement range of 0 to 2,000 ppm with an accuracy of +/- 3%, providing multiple analog output options including 0-5VDC, 0-10VDC, and 4-20mA. This specific variant includes a 20K thermistor, a slidepot for setpoint adjustments, and a bi-color LED indicator for visual status feedback.

Why Choose This Part

This sensor offers exceptional flexibility for installers by providing three field-selectable analog outputs and compatibility with both 24VAC and 16.5-40VDC power supplies. The inclusion of a 12-bit resolution ADC ensures precise signal processing, while the integrated setpoint slidepot and LED feedback reduce the need for external user-interface hardware.

Applications

Demand Controlled Ventilation
Optimizes HVAC energy consumption by adjusting fresh air intake based on real-time occupancy and CO2 levels.
Commercial Office Buildings
Monitors air quality to ensure occupant comfort and compliance with ASHRAE indoor air standards.
Classroom and Healthcare Monitoring
Provides high-accuracy CO2 tracking to maintain healthy environments in high-occupancy public spaces.
Industrial Automation
Integrates with PLC or BAS systems via 4-20mA or 0-10V signals for environmental safety monitoring.

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 requires mounting the R2 enclosure to a standard junction box and wiring the power supply and analog signals to the internal screw terminals. For 4-20mA current loop operation, ensure the receiver impedance is within the specified load limits for the 16.5-40VDC supply range. Calibration is typically factory-set, but periodic verification against a known CO2 standard is recommended for long-term accuracy.

Also Consider

SCD41 CO2 Sensor Sensirion - A high-performance photoacoustic CO2 sensor module for engineers designing their own custom PCBs.