What is NDIR-GFC gas sensor technology? – A Pro Guide!

What is NDIR-GFC gas sensor technology? – A Pro Guide!

Sharon Ye
Sharon Ye

Technical Sales - Energy & Environment

Start a journey to understand NDIR-GFC gas sensor technology. Grasp what makes it special. Explore its various facets. By the end, a solid knowledge of this key technology will be yours.

Basic Understanding of Gas Sensors!

Gas Sensors

Definition And Functions Of A Gas Sensor

In simple terms, a gas sensor is a device that detects and quantifies the presence of gases in an area. A NDIR-GFC (Non-Dispersive Infrared – Gas Filter Correlation) gas sensor, for instance, leverages the principle of infrared absorption to monitor gas concentrations.

Its function involves taking in ambient air, measuring gas density, and outputting the value in appropriate units.

Different Types Of Gas Sensors

–   Electrochemical Sensors

Detect specific gases via a chemical reaction that produces an electrical signal. Primarily, it is used in environmental monitoring.

–   Metal Oxide Semiconductors

High sensitivity to gas change mostly used to identify harmful gases in the environment.

–   Catalytic Sensors

Operate via chemical reaction, primarily used for combustible gas detection.

–   Infrared Sensors

Utilize IR radiation to measure gas concentration, like the NDIR-GFC Gas Sensor. It is applicable in hazardous environment monitoring.

–   Photoionization Detectors

Use UV light to ionize gas, valuable for detecting volatile organic compounds.

–   Ultrasonic Sensors

Employ sound waves to detect gas leaks, used extensively in safety applications.

–   Zirconia Sensors

It measure oxygen concentration using zirconium oxide, crucial in automotive emissions control.

–   Paramagnetic Sensors

Rely on gas magnetic property for detection, typically used for oxygen detection.

–   Thermal Conductivity Sensors

Utilize the thermal properties of gases, helpful in detecting gas mixtures.

–   Optical Gas Imaging Sensors

These sensors use imaging techniques for visualizing gas leaks, primarily employed in oil and gas industries.

Working Principle Of A General Gas Sensor

The working principle of a general gas sensor revolves around detecting gas concentration changes. For a NDIR-GFC gas sensor, infrared light travels through the gas chamber.

The gas absorbs the IR light, and the sensor measures the remaining light. The less light detected, the higher the concentration of the gas.

Deep Dive into NDIR Technology!

Detailed Understanding Of NDIR (Non-Dispersive Infrared) Technology

NDIR technology, standing for Non-Dispersive Infrared, makes use of specific light frequencies. Each gas has a unique absorption coefficient at certain infrared frequencies.

The NDIR-GFC Gas Sensor measures this coefficient to detect and identify gases. Essential parts include an infrared source, a gas chamber, and a detector.

Gases inside the chamber absorb light at specific frequencies, which the sensor then measures.

How NDIR Sensors Work?

–   Infrared Source

The process starts here, where the sensor emits an infrared light.

–   Sample Chamber

The light then passes through a sample chamber. The chamber contains the gas to be measured.

–   Wavelength Filter

After the light passes through the sample, it goes through a filter. The filter lets only certain wavelengths through.

–   IR Detectors

The filtered light hits the infrared detectors. The detectors measure how much light was absorbed by the gas.

–   Gas Absorption

Each gas type absorbs different amounts of light. The more light absorbed, the more of that gas is present.

–   Electronic Circuit

The detectors send the data to the electronic circuit. This circuit prepares the data for processing.

–   Signal Processing

Algorithms in the sensor process the data. The processing determines the amount of light absorbed by the gas.

–   Concentration Calculation

The processed data provides the concentration of the gas. The more light absorbed, the higher the concentration.

–   Sensor Calibration

Calibration ensures the sensor provides accurate readings. Calibration is done in a controlled environment before the sensor is used.

–   Temperature Compensation

Temperature can affect gas concentration. The sensor accounts for temperature to ensure accurate readings.

Common Applications Of NDIR Sensors

–   Environmental Monitoring

NDIR sensors monitor air quality. They detect harmful gases in the environment.

–   Industrial Safety

In industries, NDIR sensors ensure worker safety. They detect gas leaks that could be hazardous.

–   Medical Diagnostics

In medicine, NDIR sensors detect gases in patient breath. This helps in diagnosing conditions like asthma.

–   Automotive Emissions

Cars use NDIR sensors to control and monitor exhaust emissions. They help reduce pollution from vehicles.

–   Home Appliances

At home, NDIR sensors detect gas leaks in appliances. This prevents accidents like gas explosions.

–   HVAC Systems

Heating, Ventilation, and Air Conditioning systems use NDIR sensors. They ensure optimal and safe operation.

–   Mining Operations

In mines, NDIR sensors detect harmful gases. This helps protect miners from hazards like gas leaks.

–   Leak Detection

NDIR sensors detect gas leaks in pipelines. Early detection prevents major incidents and damage.

–   Fire Detection

In fire detection, NDIR sensors detect smoke and fire gases. Early detection can save lives and property.

Introduction to GFC (Gas Filter Correlation) Technique!

Gas Filter Correlation

Detailed Explanation Of GFC Technique

Get to know the GFC technique – a key player in the world of gas sensors. The heart of the matter is NDIR-GFC Gas Sensor. This tool’s main task involves measuring gas concentration.

With its NDIR technology, non-dispersive infrared rays pass through the gas. Meanwhile, GFC technique adjusts the wavelength of the infrared rays. Yes, the job is tough.

However, NDIR-GFC handles it with precision. There’s more! This system excels in its filtering method, giving you high-quality results every time. Not forgetting the robustness that sets the device apart.

The Role Of GFC In Improving Gas Sensor Performance

–   Enhanced Sensitivity

NDIR-GFC Gas Sensor boosts sensitivity. With greater sensitivity, detection becomes a breeze, even at lower concentrations. Trust, accuracy, and ease make this an industry favorite.

–   Reduced Interference

NDIR-GFC limits other gases’ interference. The reduction in false alarms offers improved trust and reliability in measurements.

–   Improved Selectivity

The GFC technique provides a bonus – increased selectivity. Specific gas types detected with ease lead to better safety in industries.

–   Temperature Compensation

Fluctuations in temperature won’t bother NDIR-GFC. The sensor ensures stable readings despite temperature variations. So, you’ll get reliable data throughout.

–   Humidity Impact Minimization

High humidity? No issue for the NDIR-GFC Gas Sensor. Its built-in feature minimizes the impact of moisture, offering reliable gas readings.

–   Long-term Stability

Stability is a top feature of NDIR-GFC. The device assures consistent performance over long periods, ensuring confidence in its readings.

–   Improved Accuracy

NDIR-GFC offers improved accuracy in gas detection. With precise measurements, trust in data quality grows.

–   Response Time Reduction

Quick response times make NDIR-GFC stand out. The device detects changes in gas concentrations in record time, a feature much needed in critical situations.

–   Calibration Stability

The NDIR-GFC Gas Sensor holds calibration well. Even with constant use, the device maintains accurate readings, ensuring high-quality data.

–   Broad Wavelength Application

The broad wavelength range is another unique feature. It allows the NDIR-GFC Gas Sensor to measure different gas types, increasing its versatility.

Unpacking NDIR-GFC Gas Sensor Technology!

Comprehensive Understanding Of NDIR-GFC Gas Sensor Technology

In the gas detection industry, NDIR-GFC Gas Sensor technology stands out. A Non-Dispersive Infrared Gas Filter Correlation (NDIR-GFC) Gas Sensor uses light to detect gas levels.

Carbon dioxide, methane, and other gases absorb this light. Next, a special lens gathers light. Lastly, an infrared detector measures light. High light absorption signals high gas levels. Hence, gas presence and concentration get detected.

How NDIR-GFC Gas Sensors Work?

NDIR-GFC Gas Sensors work with infrared light. Once turned on, an infrared light source emits light. Then, the light travels through a gas chamber. Gas molecules in the chamber absorb light.

In fact, more gas molecules mean more light absorption. Afterward, a filter blocks certain wavelengths. Only light at specific wavelengths reaches the detector. Consequently, the sensor calculates gas levels based on light absorption.

Unique Features Of NDIR-GFC Gas Sensors

–   Low Maintenance

NDIR-GFC Gas Sensors need minimal care. Their sturdy build requires fewer repairs and replacements.

–   Long Life Span

Long-lasting sensors offer reliable service for years. In essence, NDIR-GFC Gas Sensors offer superior longevity.

–   High Accuracy

These sensors provide precise gas measurements. Their technology minimizes errors for high accuracy readings.

–   Wide Range Sensitivity

NDIR-GFC Gas Sensors detect a variety of gases. Moreover, their sensitivity spans a broad range of concentrations.

–   Stable Calibration

Calibration stays consistent over time. Therefore, these sensors give dependable results.

–   High Reliability

NDIR-GFC Gas Sensors are trusted by industry professionals. Their reliable performance ensures safety.

–   Fast Response Time

These sensors respond swiftly to changes in gas levels. Hence, they provide prompt alerts.

–   Specificity to Gas

NDIR-GFC Gas Sensors are particular about the gases they detect. Consequently, they offer more specific results.

–   Resistant to Poisoning

These sensors resist chemical poisoning. As a result, they continue to work well even in harsh environments.

–   Less Affected by Humidity

Humidity has minimal impact on NDIR-GFC Gas Sensors. Therefore, their performance remains consistent in diverse weather conditions.

FeatureNDIR-GFC Gas SensorsElectrochemical SensorsMOS Gas SensorsPID Gas SensorsOptical Gas SensorsUltrasonic Gas Sensors
Life Span (years)10+3-55-72-38-1010+
Sensitivity RangeWideNarrowWideWideNarrowWide
Calibration StabilityStableUnstableStableUnstableStableUnstable
Response Time (seconds)<30<60<30<20<60<30
Specificity to GasHighMediumLowHighHighMedium
Resistance to PoisoningYesNoYesNoYesNo
Effect of HumidityLessMoreMoreLessMoreLess
Table on Unique Features Of NDIR-GFC Gas Sensors!

Advantages of NDIR-GFC Technology!

–  Greater Sensitivity

NDIR-GFC gas sensor shines in its sensitivity. Detects even minute gas amounts with precision.

–  Enhanced Accuracy

High accuracy defines this technology. It reduces errors in measurement significantly.

–  Better Stability

Stable measurements form the core of NDIR-GFC. Sensor readings remain constant over time, ensuring consistency.

–  Wide Dynamic Range

NDIR-GFC technology displays a wide dynamic range. It measures low and high gas concentrations effectively.

–  Resistance to Contaminants

Contaminants pose less threat to NDIR-GFC. The sensor stays efficient in varied environments.

–  Long Sensor Life

The life span of NDIR-GFC sensors stands tall. It lasts longer, delivering consistent performance over time.

–  Low Power Requirement

Energy efficiency marks NDIR-GFC. The sensor operates at low power, thus saving energy.

–  Minimal Maintenance

It requires less maintenance, more convenience. The NDIR-GFC gas sensor requires minimal upkeep.

–  High Signal-to-Noise Ratio

NDIR-GFC technology ensures a high signal-to-noise ratio. It keeps useful signals intact while reducing unwanted noise.

–  Versatile Gas Detection

Not limited to specific gases. NDIR-GFC sensors detect a broad spectrum of gases.

Comparison between NDIR-GFC and Traditional NDIR Technology!

Comparison between NDIR-GFC and Traditional NDIR Technology!

–  Sensitivity Levels

NDIR-GFC surpasses traditional NDIR in sensitivity. The former detects even tiny gas concentrations, outdoing the latter.

–  Calibration Stability

Stability in calibration is more evident in NDIR-GFC. Traditional NDIR might require more frequent calibration checks.

–  Gas Specificity

Both technologies detect a wide range of gases. However, NDIR-GFC might prove more selective, enhancing specificity.

–  Resistance to Contaminants

NDIR-GFC shows higher resistance to contaminants. In contrast, traditional NDIR might be more susceptible.

–  Maintenance Requirements

NDIR-GFC requires less maintenance compared to traditional NDIR. Thus, reducing upkeep hassles.

–  Dynamic Range

NDIR-GFC flaunts a broader dynamic range. Traditional NDIR might not measure extreme gas concentrations as effectively.

–  Power Requirements

NDIR-GFC operates at lower power levels than traditional NDIR. Hence, it conserves more energy.

–  Response Times

The response times of NDIR-GFC surpass those of traditional NDIR ensuring faster, more efficient gas detection.

–  Signal-to-Noise Ratio

NDIR-GFC has a higher signal-to-noise ratio. Traditional NDIR might have more noise interference.

–  Cross-sensitivity

Cross-sensitivity is less in NDIR-GFC. Traditional NDIR might react more to gases other than the targeted one.

Troubleshooting and Maintenance of NDIR-GFC Gas Sensors!

Troubleshooting and Maintenance of NDIR-GFC Gas Sensors!

Common Issues And How To Solve Them?

Non-dispersive Infrared Gas Filter Correlation (NDIR-GFC) Gas Sensors hold critical functions. Each sensor features two infrared detectors.

One detects gas presence; the other serves as a reference. A problem arises when these detectors give false signals. A faulty sensor gives incorrect gas concentration readings. By replacing the faulty infrared detector, the sensor restores accurate measurements.

When the gas filter experiences wear and tear, sensor performance dwindles. A worn-out filter allows the gas to leak, causing inaccurate readings. In such cases, replace the gas filter promptly.

Moreover, incorrect temperature compensation causes sensor performance issues. Each NDIR-GFC Gas Sensor features a thermistor. The thermistor measures the sensor’s temperature. When temperature readings are incorrect, replace the thermistor.

Maintaining The Performance Of NDIR-GFC Sensors

Sensor performance depends on regular maintenance. All parts of the NDIR-GFC sensor need regular checks. Over time, dust and dirt can settle on the optical components. Hence, regular cleaning is necessary for efficient sensor operation.

Lenses and mirrors are integral parts of the NDIR-GFC sensor. The mirrors reflect the infrared beam onto the detectors. The lens focuses the beam.

Dust and dirt on these components will impede the infrared beam. So, cleaning these components with a soft cloth regularly keeps the sensor in good shape.

Importance Of Regular Calibration And Checks

Regular calibration of the NDIR-GFC sensor is paramount. Calibration checks the sensor’s performance against known gas concentrations. Regular calibration ensures accuracy in the sensor’s measurements.

NDIR-GFC sensors come with specific calibration intervals. Some need calibration every six months; others need annual calibration. Adhering to the manufacturer’s calibration intervals assures the sensor’s peak performance.

NDIR-GFC sensor calibration requires known gas concentrations. These are often provided in calibration gas cylinders. Sensor calibration with these cylinders ensures accurate measurements. Regular checks and calibrations keep the NDIR-GFC sensor working at optimal levels, ensuring accurate and reliable gas measurements.


So, a deep dive into NDIR-GFC gas sensor technology has been made. Now, understand the profound impact it can have. To take the next step, consider exploring the multitude of offerings at ESEGAS. Continue to learn, and harness the power of this advanced technology.


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