CO₂ and air quality meter | sensor | RS485/4-20mA/0-10V | 0-5000ppm | white

Technical Specifications

Measurement range (CO₂): 0 (400) ~ 2000 — 5000 ppm
Measurement principle: patented photoacoustic technology and NDIR dual-channel design
Accuracy: ±50 ppm + 5% of reading
Repeatability: ±20 ppm + 1% of reading
Response time: < 1 minute (natural gas diffusion)
Temperature range (operating): -10 °C ~ +50 °C
Temperature range (storage): -20 °C ~ +80 °C (non-condensing)
Humidity measurement: integrated, accurate display on LCD screen
Long-term stability: < 10 ppm per year
Sensor lifetime: up to 15 years
Calibration: manual via RS485 interface (according to communication protocol)
Power supply: 15–24 V AC/DC
Output signals:
• B/D type: 4–20 mA or 0–10 V (jumper selectable)
• M type: RS485 Modbus RTU

Output load: for current output ≤ 500 Ω, for voltage output ≥ 10 kΩ
Connection: wired terminals (5.0 mm pitch, suitable for ≥16 AWG wires)
Protection: surge protection
Display: LCD with real-time CO₂, temperature, and humidity readings
Warm-up time: 6 s
Mounting: wall or ceiling, also suitable for flat placement

Functions

Accurate CO₂, temperature, and humidity measurement system

Patented photoacoustic and NDIR dual-channel technology for durability

Fast response time and minimal warm-up period

Manual CO₂ calibration via RS485 interface

Multiple output signal types (4–20 mA, 0–10 V, RS485)

Clear LCD screen for real-time monitoring

Flexible mounting: wall, ceiling, or desktop

Applications

Smart buildings: air quality control, fire prevention, gyms, hospitals

Agriculture: greenhouse microclimate optimization, livestock ventilation control, controlled atmosphere storage rooms

Industry: air control in production facilities, combustion process optimization, metalworking safety solutions

Residential: ensuring comfort and health by monitoring indoor air quality

Pros

Highly accurate and stable measurement for long-term use

Universal output signals for integration into different systems

Quick start-up (only 6 seconds)

Long-lasting sensor – up to 15 years lifetime

Cons

Requires external power supply (15–24 V AC/DC)

Manual calibration requires RS485 communication experience