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MNS-QT221
Manorshi
14*16mm
UART/0.4～2V
pin
3.3~5V
Product Description
This CO2 gas sensor uses infrared absorption technology for carbon dioxide concentration measurement. It supports multiple measurement ranges and provides UART and analog voltage output for system integration. With temperature compensation, stable performance and fast response, it is suitable for CO2 detection and monitoring equipment.
Excellent stability,resistance to water vapor interference
Non-poisoning,high sensitivity,high resolution
Low power consumption,and fast response time
Temperature compensation
Target Gas | Carbon Dioxide (CO2) |
Detection Principle | Infrared Absorption |
Measurement Range | 0–2000 ppm / 0–5000 ppm / 0–1%vol / 0–2%vol / 0–5%vol / 0–100%vol |
Accuracy | ±5%FS |
Operating Voltage | 3.3–5 VDC |
Average Current | <85 mA |
Interface Level | DC 3.0 V |
Output Signal | UART / 0.4–2 V |
Warm-up Time | 180 s |
Response Time | T90 <30 s |
Temperature Compensation | Yes |
Operating Temperature | -20°C to +60°C |
Operating Humidity | 0–95% RH, Non-condensing |
Lifespan | >5 Years |
Protection Level | IP65 |
Weight | 25 g |
Intrinsic Safety Parameters | Ui=7.5 VDC, Ii=265 mA, Pi=0.5 W, Ci=10 μF, Li=0 mH |
Pin | Description |
|---|---|
Pin 1 | GND |
Pin 2 | Vin Voltage Input |
Pin 3 | UART RXD Data Input, 0-3.0V |
Pin 4 | Vout, 0.4-2V |
Pin 5 | UART TXD Data Output, 0-3.0V |
The dual-output design allows OEM manufacturers to integrate the sensor into embedded controllers, gas detectors and intelligent monitoring equipment.
CO2 gas detectors
Indoor air quality monitoring equipment
Environmental monitoring equipment
Industrial CO2 monitoring systems
OEM gas sensing equipment
The MNS-QT221 is an NDIR carbon dioxide sensor. It measures CO2 concentration using infrared absorption technology.
Available measurement ranges include 0–2000 ppm, 0–5000 ppm, 0–1% vol, 0–2% vol, 0–5% vol, and 0–100% vol.
The sensor supports UART digital communication and a 0.4–2 V analog voltage output.
The MNS-QT221 operates from a 3.3–5 VDC power supply.
The specified response time is T90 <30 seconds.
Yes. The sensor includes temperature compensation to improve measurement stability under changing environmental temperatures.
The operating temperature range is -20°C to +60°C.
The MNS-QT221 has an IP65 protection level.
The expected service life is more than five years under suitable operating conditions.
Yes. Its compact design, multiple CO2 measurement ranges, UART interface, analog output, and long service life make it suitable for integration into OEM gas detection and monitoring equipment.
