Gas Sensors – NDIR & Electrochemical Gas Detection Solutions
MANORSHI supplies gas sensors for equipment manufacturers, distributors and professional users developing gas detection and monitoring systems. Our catalog includes non-dispersive infrared (NDIR) sensors for carbon dioxide (CO2) and methane (CH4), along with electrochemical sensors for carbon monoxide (CO), hydrogen sulfide (H2S), ozone (O3), chlorine (Cl2), sulfur dioxide (SO2), nitrogen dioxide (NO2), ammonia (NH3) and nitric oxide (NO).
Select a sensor according to the target gas, required measurement range, electrical interface, environmental conditions and intended equipment design. For product availability, detailed performance specifications, evaluation samples and OEM inquiries, contact MANORSHI with your application requirements.
Gas Sensor Models and Detection Ranges
The following overview summarizes models shown in the MANORSHI gas sensor catalog. A measurement range is included only when it is stated in the product listing; confirm all other technical parameters using the current model datasheet.
Model | Target Gas | Sensing Technology | Detection Range |
MNS-QT221 | Carbon Dioxide (CO2) | NDIR | Confirm by datasheet |
MNS-QT331 | Methane (CH4) | NDIR | 0–100% LEL |
MNS-4CO-1000 | Carbon Monoxide (CO) | Electrochemical | 0–1000 ppm |
MNS-4H2S-100 | Hydrogen Sulfide (H2S) | Electrochemical | 0–100 ppm |
MNS-4O3-10 | Ozone (O3) | Electrochemical | 0–10 ppm |
MNS-4CL2-10 | Chlorine (Cl2) | Electrochemical | 0–10 ppm |
MNS-4SO2-20 | Sulfur Dioxide (SO2) | Electrochemical | Confirm by datasheet |
MNS-4NO2-20 | Nitrogen Dioxide (NO2) | Electrochemical | Confirm by datasheet |
MNS-4NH3-100 | Ammonia (NH3) | Electrochemical | Confirm by datasheet |
MNS-4NO-250 | Nitric Oxide (NO) | Electrochemical | Confirm by datasheet |
NDIR vs. Electrochemical Gas Sensors
NDIR Infrared Gas Sensors
NDIR sensors determine gas concentration by measuring the absorption of infrared light at selected wavelengths. This technology is widely used for infrared-active gases such as CO2 and methane. MANORSHI lists the MNS-QT221 CO2 sensor and MNS-QT331 methane sensor in this category. The MNS-QT331 listing specifies a 0–100% LEL measurement range and UART output; electrical and environmental requirements should be verified against the latest datasheet.
Electrochemical Gas Sensors
Electrochemical sensors detect particular gases through an electrochemical reaction that produces a measurable electrical signal. They are commonly selected for low-concentration monitoring of gases such as CO, H2S, O3, Cl2, SO2, NO2, NH3 and NO. Selection requires attention to measuring range, expected sensor life, operating temperature and humidity, cross-sensitivity, calibration and signal-conditioning requirements.
Selection Factor | NDIR Gas Sensor | Electrochemical Gas Sensor |
Operating Principle | Infrared light absorption | Electrode reaction and electrical signal |
Available Target Gases | CO2, CH4 | CO, H2S, O3, Cl2, SO2, NO2, NH3, NO |
Typical Integration Considerations | Power, interface, optical measurement range and environmental compensation | Signal conditioning, calibration, cross-sensitivity and replacement interval |
Industrial Gas Sensor Applications
Indoor Air Quality and Ventilation: CO2 sensors can be integrated into air quality monitors, HVAC equipment and ventilation control systems when their specified range and performance meet the application requirements.
Combustible Gas Monitoring: CH4 sensors can be evaluated for methane detection equipment. For safety-critical installations, confirm alarms, system-level testing and applicable certification requirements independently of the sensing element.
Industrial Safety Instruments: CO and H2S sensors may be used in portable or fixed gas monitoring devices, subject to suitable calibration, sampling design and system validation.
Environmental and Process Monitoring: O3, Cl2, SO2, NO2, NH3 and NO sensors can be considered for specialized monitoring instruments after verifying measurement range, cross-sensitivity and exposure conditions.
How to Choose a Gas Sensor for Your Equipment
1. Identify the Target Gas. Specify the gas name and chemical formula, and list any other gases that may be present during operation.
2. Define the Measurement Range. Provide normal and maximum concentrations in ppm, % volume or % LEL, along with the required resolution and alarm threshold where applicable.
3. Review Electrical and Mechanical Integration. Confirm the required supply voltage, signal type, interface, dimensions, connector and available space in your device.
4. Describe the Operating Conditions. Include temperature, humidity, atmospheric conditions, potential interfering gases, exposure frequency and any relevant regulatory requirements.
5. Request the Current Datasheet and Evaluation Details. Check response time, accuracy, drift, calibration procedures, service life, lead time and expected purchase volume before approving a model for production.
Frequently Asked Questions About Gas Sensors
What gases can MANORSHI gas sensors detect?
The listed models cover carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), hydrogen sulfide (H2S), ozone (O3), chlorine (Cl2), sulfur dioxide (SO2), nitrogen dioxide (NO2), ammonia (NH3) and nitric oxide (NO). Model availability and specifications should be confirmed when placing an inquiry.
What is the difference between NDIR and electrochemical gas sensors?
NDIR technology measures infrared absorption and is suited to certain infrared-active gases, including CO2 and methane. Electrochemical technology measures gas-related reactions at electrodes and is commonly used for specific toxic or reactive gases. The appropriate option depends on the gas, operating environment and measurement requirements.
Which gas sensors are suitable for CO2 and methane detection?
MANORSHI lists the MNS-QT221 NDIR CO2 sensor and MNS-QT331 NDIR CH4 sensor. The MNS-QT331 product listing specifies 0–100% LEL and UART output. Request the latest datasheets to verify the range, interface and operating conditions for your design.
What measurement ranges are available for electrochemical sensors?
The listed MNS-4CO-1000 measures 0–1000 ppm CO, MNS-4H2S-100 measures 0–100 ppm H2S, MNS-4O3-10 measures 0–10 ppm O3, and MNS-4CL2-10 measures 0–10 ppm Cl2. Contact MANORSHI for confirmed ranges for other models.
Can I integrate these sensors into OEM gas detection equipment?
These products can be evaluated for OEM equipment integration. Provide your target gas, range, required signal interface, supply voltage, mechanical constraints and operating conditions so that MANORSHI can review model suitability and available documentation.
How often do electrochemical gas sensors require calibration or replacement?
Calibration frequency and replacement intervals depend on the sensor model, gas exposure, operating environment and performance requirements. Follow the current datasheet and the finished equipment manufacturer's maintenance procedure.
What should I include when requesting a quotation or sample?
Include the model or target gas, required range, application, signal interface, order quantity, project timeline and destination country. If you require evaluation samples, state your planned test conditions and expected production volume.
Looking for a gas sensor supplier for a new instrument or existing production line? Send MANORSHI your target gas, technical requirements and estimated quantity to discuss available models, datasheets, samples and quotation details.
Email: norr@manorshi.com Phone: +86-519-89185720
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