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Novel infrared measuring system for CO2
With an infrared sensor (IR sensor) specifically for carbon dioxide.
The infrared measuring system detects the carbon dioxide content of the ambient air fast and precisely. It contains a novel infrared measuring system functioning basically like a conventional two-beam photometer.
However, since material and construction of the sample cell are novel, and the measured signals are evaluated and processed according to a new digital algorithm, the infrared measuring system is light-weight, compact, in normal applications maintenance-free and long-term stable but nevertheless affordable.
The infrared measuring system detects the absolute carbon dioxide content of the ambient air (partial pressure), monitors itself constantly and signals malfunctions of its hard and software. The whole measuring range is linear.
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The GMT220 transmitter series is designed for a wide range of industrial carbon dioxide applications including greenhouses, fruit storages, safety alerts and demand-controlled ventilation in mushroom farms, livestock husbandry and parking garages.
The GMT220 transmitters measure carbon dioxide in harsh and humid environments. The housing is dust and waterproof to IP65/NEMA4. The materials have been chosen for extended corrosion resistance.
The GMT220 transmitters are easy to use and install. The transmitters have a modular structure which includes a separate mounting plate for easy installation.
Interchangeable probes facilitate field maintenance. The probes can simply be replaced with newly calibrated ones, or with separate probes that are only used as a reference for calibration checking. This minimizes downtime and eliminates the need for expensive calibration equipment.
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The GasAlertMicro 5 IR, is a portable gas detector that simultaneously monitors atmospheric levels of up to five gases including carbon dioxide (CO2), oxygen (O2), hydrogen sulphide (H2S), combustibles (%LEL) and a range of toxic gases. Compact and lightweight, the GasAlertMicro 5 IR activates audible, visual and vibrating alarms in the event of a low, high, TWA or STEL alarm condition.
Utilizing a non-dispersive infrared (NDIR) CO2 sensor, the GasAlertMicro 5 IR offers premium accuracy and reliability. Suitable for personal protection in a wide range of applications, the GasAlertMicro 5 IR can dependably detect CO2 hazards in wineries and breweries, agriculture, food processing or any confined space entry application. |
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Series 200ACE Acetaldehyde Analyzer
Meets ISBT Method 11 criteria for selective measurement of acetaldehyde in CO2
- Rugged, low cost, low maintenance, turn-key system
- Capable of PC-based control and data logging
- Batch or continuous stream monitoring
- Detector: Flame Ionization Detector (FID)
- Automatic, hands-free calibration, flow setting and analysis
- Detection limits for acetaldehyde of < 30 part-per-billion (ppb)
- Instrument operating temperature: ambient
- Detector temperature: factory set; adjustable
- Oven temperature regulation: factory set with software controlled conditioning
- Tested against virtually all of the potential alcohol and oxygenate impurities that could be present and determined to be interference-free
- Acetaldehyde is captured by the software system, with results displayed digitally on the instrument's front panel
- On-board software package contained in the Series 200ACE allows complete unattended operation
- Installation: bench or 19" rack
- Power: 115-230 V, 50-60 Hz
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Series 200AHC Aromatic Hydrocarbon Analyzer
Specific detection of benzene within beverage-grade carbon dioxide.
Trace aromatic impurity monitoring is of critical importance to carbon dioxide manufacturers and the carbonated beverage industry. The Series 200 AHC meets all ISBT Method 12.0 criteria for selective measurement of benzene in carbon dioxide. Continuous stream or batch sampling operations are readily performed.
The Series 200 AHC is specifically designed as a rugged, low cost, low maintenance, simple to operate, turn-key system. No cylinder support gases are needed. Calibration and sample introduction are totally automated. A newly designed photo-ionization detector (PID) and proprietary technology are used for the specific measurement of benzene without interference from other potential impurities in beverage-grade carbon dioxide. Detector response is linear over three orders of magnitude. The detectable limit for benzene is 3 ppb, which is far below the ISBT guideline limit of 20 ppb. GOW-MAC’s Series 200 AHC system is also capable of PC-based control and data logging. Full documentation is provided, along with optional customer training and support services.
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Series 200BTEX Gas Analyzer
Meets all ISBT Method 12 criteria for selective measurement of BTEX (benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene) in CO2
- Rugged, low cost, low maintenance, turn-key system
- Features: Auto-Calibration, Auto-Calibration Validation, Process/Manual mode, As Found/As Left function, Sample stream selection, and six 4-20 mA outputs
- Capable of PC-based control and data logging
- Batch or continuous stream monitoring
- Detector: Photo Ionization Detector (PID)
- Automatic, hands-free calibration, flow setting and analysis
- Detection limits for benzene of < 5 ppb
- Instrument operating temperature: ambient
- Detector temperature: factory set; adjustable
- Oven temperature: factory set with software controlled conditioning
- Tested against virtually all of the potential alcohol and oxygenate impurities that could be present and determined to be interference-free
- Benzene is captured by the software system, with results displayed digitally on the instrument's front panel
- On-board software package contained in the Series 200AHC allows complete unattended operation
- Installation: bench or 19" rack
- Power: 115-230 V, 50-60 Hz
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NDIR Carbon Dioxide - Infared Sensors
Alphasense contemporary designed miniature CO2 infra-red sensors are self-contained, plug in sensors with integrated optics contained within standard sized miniature (20.0 mm) gas sensor housings. There are no moving parts within the sensors. An internal temperature sensor is included to enable the temperature to be monitored at the detectors, thereby providing the best means of compensating for temperature effects, including ideal gas law corrections.
CO2 Gas Ranges
IR-CO2-A1 Carbon Dioxide 0 to 5,000-ppm
IR-CO2-A1 Carbon Dioxide 0 to 5% Volume
IR-CO2-A1 Carbon Dioxide 0 to 20% Volume
IR-CO2-A1 Carbon Dioxide 0 to 100% Volume |
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The LED based CO2 NDIR sensor is a fast response, low power NDIR CO2 sensor. It uses patented Indium Antimonide technology to produce a solid state source/detector pair. This gives a fast response to changes in gas concentration, and high immunity to ambient light/heat sources.
Carbon Dioxide (CO2) is measured by recording changes in the transmission of mid IR wavelengths around the carbon dioxide absorption peak at 4.26um.
The C20 is fully solid state, using an advanced mid IR LED and photodiode pair.
This eliminates the need for heated filaments entirely.
This sensor produces a temperature compensated, linearised output via a serial line, and is extremely simple to integrate into microcontroller based instruments.
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The Alphasense patented carbon dioxide sensor is a world first in CO2 monitoring:
Requires no power
Operates at room temperature
One sensor measures from 500ppm to 95% CO2
Small size
Low cost
Simple interfacing
Using the potentiometric measuring principle with our patented silver halide solid state electrolyte, this sensor does not have the high power requirement or high price tag of NDIR technology. This sensor is ideal where low cost and low power are critical for CO2 measurement.
This sensor is the result of seven years of research and development, and this work continues. While not as accurate as NDIR, and not suitable for IAQ measurements, this sensor is ideal for safety alarms, combustion gas monitoring and high CO2 process monitoring.
Contact us with your application. Evaluation boards are available. |
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Figaro Pre-calibrated CO2 sensor modules combine Figaro's CO2 sensor TGS4160/ 4161 with a microcomputer and Figaro's proprietary signal processing technique.
With simple user-defined settings, this module generates a control signal for ventilation and/or air conditioning systems. The result is economic, long-lived, and maintenance free air quality control. When compared with traditional CO2 sensor modules using infrared sensors, Figaro's CO2 module is much more cost effective.
CDM4160 - Pre-calibrated CO2 modules
Suitable for indoor ventilation control and CO2 monitoring in factories, agriculture, and automobiles where conditions are more severe than in residential applications. Based on the specific needs of each user, models are available in three sensitivity ranges: 400-4000ppm, 400-8000ppm, and 400-40000ppm.
CDM4161 - Pre-calibrated CO2 module
Suitable for indoor ventilation control in residences and high occupancy buildings. Models with detection ranges of 400-4000ppm or 400-8000ppm are available to meet the specific requirements of your application.
* pre-calibrated
* maintenance-free
* linear voltage output corresponding to CO2 concentration
* control signal
* malfunction signal |
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