Overview
NT-B20M NDIR infrared gas module is a common type, small size sensor, pins type or terminal type, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
Key Features
- High sensitivity
- Low power consumption
- Good stability
- Temperature compensation, excellent linear output
- Multiple output modes: UART, PWM
- Long life span
- Anti-water vapor interference, anti-poison
Applications
- Smart home
- Air cleaner device
- Indoor air quality monitoring
- Ventilation system
Technical Specifications
| Model No. | NT-B20M |
| Detection gas | CO2 |
| Working Voltage | 5.0±0.1V DC |
| Average Current | <40mA (@5V power supply) |
| Peak Current | 125mA (@5V power supply) |
| Interface Level | 3.3V (Compatible with 5V) |
| Detection range | 400~10000ppm (optional, see table 2.) |
| Output Signal | Serial Port (UART) (TTL level 3.3V) |
| PWM | |
| Preheat Time | 1 min |
| Response Time | T90 <120s |
| Working Temperature | 0 ~ 50°C |
| Working Humidity | 0 ~95% RH (No condensation) |
| Storage Temperature | -20~60 °C |
| Weight | 5g |
| Life Span | > 5 years |
