The Wall-Mount CO2 Room Transmitter provides dependable, multi-variable indoor air quality monitoring, precision carbon dioxide sensing, and continuous climate feedback engineered for commercial buildings, educational institutions, cleanrooms, and automated HVAC facilities.

Demand-Controlled Ventilation with the Wall-Mount CO2 Room Transmitter

Designed to optimize building energy performance and indoor environmental health, the Wall-Mount CO2 Room Transmitter consolidates non-dispersive infrared (NDIR) gas detection with solid-state temperature and capacitive humidity sensing elements. By integrating three critical air quality metrics into a single compact wall-mount instrument, it eliminates the architectural clutter, wiring complexity, and hardware expense of deploying separate single-function field probes.

The unit features three independent, fully linear 0–10 V DC analog outputs corresponding to carbon dioxide levels, room temperature, and relative humidity. These standardized low-impedance voltage loops wire directly into programmable logic controllers, direct digital control (DDC) panels, variable air volume (VAV) terminal boxes, and central building management systems (BMS). An integrated automatic baseline calibration algorithm continuously corrects for optical component aging and thermal drift, preserving high measurement accuracy without requiring routine field re-zeroing with calibration gas canisters.

The low-profile enclosure is molded from flame-retardant ABS and polycarbonate polymer, incorporating passive convective aeration louvers that promote continuous ambient air exchange across the sensing core while shielding sensitive internal electronics against mechanical damage and dust settling.

Key Features and Engineering Advantages

• Triple Parameter Integration: Measures carbon dioxide concentration, ambient air temperature, and relative humidity simultaneously within one low-profile wall housing.
• Dual-Wavelength NDIR Technology: High-stability optical infrared measurement delivers rapid response kinetics, high gas selectivity, and resistance to chemical interference.
• Automatic Baseline Calibration: Internal background tracking routine automatically recalculates the clean-air baseline, eliminating routine manual span adjustments.
• Three Independent 0–10V Outputs: Provides separate linear analog signals for each variable, allowing simultaneous modulation of ventilation dampers, reheat coils, and humidifiers.
• Simplified Field Installation: Detachable baseplate with standardized mounting patterns fits standard wall junction boxes or mounts flush against drywall via screw terminals.

Technical Specifications

Industrial Applications and Process Integration

The Wall-Mount CO2 Room Transmitter provides vital indoor climate feedback across commercial, institutional, and industrial facilities:

• Demand-Controlled Ventilation (DCV) loops in corporate office towers, conference centers, and high-density commercial spaces.
• Indoor air quality and occupancy monitoring across schools, university lecture auditoriums, and training complexes.
• Environmental compliance, humidity tracking, and ventilation regulation in cleanrooms, pharmaceutical laboratories, and clinics.
• Air Handling Unit (AHU) economizer damper control and fresh air intake sequencing in centralized BMS systems.

Frequently Asked Questions

How does automatic baseline calibration maintain CO2 measurement accuracy?
The internal NDIR module utilizes an automated self-calibration routine that logs the lowest CO2 levels recorded over continuous operational intervals (typically during unoccupied periods at night). It recalculates the clean ambient air reference against an outdoor baseline of 400 ppm, preventing sensor drift without requiring manual calibration gases.

Can the three 0–10V output channels be wired to separate controller cards?
Yes. While the three 0–10 V DC output channels share a common signal ground reference, each voltage signal is generated independently. They can terminate into distinct analog input cards on a single DDC unit or route to separate PLC nodes.

Where should the transmitter be positioned for optimal room air monitoring?
The transmitter should be installed vertically on an interior wall approximately 1.5 meters (5 feet) above the finished floor in an area with representative convective air circulation, away from direct sunlight, radiant heating equipment, drafty doors, and supply air diffuser discharge paths.