Carbon dioxide levels above 1,000 ppm reduce cognitive performance by 15%. IAQ Detectors manufactures wall-mount and duct-type CO₂ transmitters with Modbus RS485 and Wi-Fi, purpose-built for HVAC systems, commercial buildings, schools, and demand-controlled ventilation.
CO₂ level reference — ppm
.webp)
Carbon Dioxide Transmitter
Duct Carbon Dioxide Transmitter
CO₂ + Temperature / RH Monitor
CO₂ Controller
6-in-1 Indoor Air Quality Monitor
Wall mount vs duct type — quick specification reference
| Feature | CO₂ Transmitter | Duct CO₂ Transmitter | CO₂ + T/RH Monitor | CO₂ Controller | 6-in-1 IAQ Monitor |
|---|---|---|---|---|---|
| Mount type | Wall | Duct / In-line | Wall | Wall | Wall |
| CO₂ sensing | ✓ | ✓ | ✓ | ✓ | ✓ |
| Temperature | — | — | ✓ | — | ✓ |
| Humidity (RH) | — | — | ✓ | — | ✓ |
| VOC / PM sensing | — | — | — | — | ✓ |
| Relay output | — | — | — | ✓ | — |
| Modbus RS485 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Wi-Fi | ✓ | — | — | — | ✓ |
| Display | ✓ | ✓ | ✓ | ✓ | ✓ |
| Best for | Offices, schools | AHU, HVAC ducts | Comfort + CO₂ | Ventilation control | Complete IAQ |
Where CO₂ monitoring is critical
Commercial buildings
Monitor CO₂ in open-plan offices and meeting rooms for occupant productivity and ASHRAE 62.1 compliance.
Schools & classrooms
High CO₂ levels reduce student focus. Wall-mount transmitters enable automatic ventilation triggers.
Hospitals & clinics
Infection control and ventilation adequacy validated through continuous CO₂ monitoring in wards.
HVAC / AHU systems
Duct-type transmitters feed CO₂ data to building management systems for demand-controlled ventilation.
Hotels & hospitality
Ensure guest room air quality without energy waste. Occupancy-based ventilation via CO₂ setpoints.
Industrial environments
Safety monitoring in enclosed production areas, cold storage, and server rooms requiring ventilation control.
Expert guidance
Our application engineers will recommend the right product based on your duct dimensions, building type, BMS integration, and compliance requirements. Most enquiries answered within 24 hours.