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Alphasense Sulfur Dioxide SO2 B series sensors are supplied in leakproof housing with clearly colour coded red mouldings. They have an operating range suitable for personal safety monitoring applications. Additional sensors with significantly higher operating and overload ranges are available to satisfy the needs of the Stack Gas Analyser market. These provide linear outputs to 5000ppm (parts per million) with overgas capacity to 10,000ppm.
The Sulfur Dioxide sensors provide OEM's with a good, reliable sensor for use in a number of high volume applications. The sensors are designed for use in both fixed head and portable instrumentation.
As with all Alphasense sensors, the use of stabilisation racks to continuously monitor every sensor during initial conditioning ensures that only sensors operating within specification are passed to the Company's unique ATAV (Alphasense Test and Validation) system. The key operating characteristics for every sensor are recorded against the sensor serial number, which is bar coded onto the sensor. This data can be released at the time of despatch so that full traceability is maintained.
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Electrochemical Sensors
Design does matter: a bigger sensor means bigger electrodes and more electrolyte, hence
faster response
higher accuracy
more stability
longer life
The smart DraegerSensor with embedded micro-chip and temperature element supports sensor recognition, numerous selftest functions, remote calibration and signal compensation over the entire temperature range of typically -40 to +65 ºC.
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Ocean Optics sensor systems are ushering in a new generation of low-cost, portable chemical-sensing devices. Thanks to innovation in the development of chemical-sensing complexes -- particularly those with fluorescing properties -- products such as our Oxygen Sensor systems will continue to provide viable alternatives to traditional chemical-sensing devices such as electrodes. The use of optical-sensing methods lessens the reliance on the electrochemical technologies that have dominated the field of oxygen sensing.
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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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Advanced Gasmitter
NDIR-Dual Wavelenth Principle
Type AGM 1010 for CO2 and CH4
OEM-Gastransmitter with improved characteristics
• NDIR-Dual wavelength sensor for gas measurement
• Low-grade drift characteristics
• Dual gas version or additional measurement range
• Fast response time
• Improved signal-to-noise ratio
• USB and RS485 interface
• Linearized analogue output: 4...20mA / 0...8V
• Display for measurement range deviation: 2...22mA output
• Temperature compensated
• Pressure compensation option
• Web based communication software
• Simple integration into analyzers and measurement systems • Versions for gas diffusion operation available
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The GasCheck infrared gas sensor is a series of low CO2 sensors which features high accuracy, good long term stability, negligible cross sensitivity, small size and low power requirement.
The basic GasCheck is available in three ranges 3000 ppm, 3% and 10% with a 0 to 1 V non-linear output. A linearisation board can be added as an option to give linear 4 to 20 mA output.
The option of a diffusion assembly is available for the 3000 ppm unit.
Originally developed for measuring CO2 concentrations in laboratory incubators, the GasCheck range has now also been adopted for a wide range of applications where accurate measurement of CO2 is required, but with the benefits of low cost and compact design.
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CO2 Sensor
The CO2 LC is a microprocessor controlled gas analyzer using non diffractive IR detection (NDIR) for determination of CO2 concentration. This low price CO2 sensor is characterized by low power consumption, a wide supply voltage range of 8 V . 15 V and simultaneous integration of current and voltage interface.
A microprocessor controls all necessary functions and performs calculations which allow fast customer specific adaptions by software variations. We offer different calibrations for varying concentrations of CO2: 10%, 11%, 30%, and 100%.
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The Gascard NG infrared gas sensor is designed for ease of integration with a wide range of gas detection systems requiring accurate and reliable measurement of Carbon Dioxide, Carbon Monoxide or Methane gas concentrations in a background of air or air-like atmospheres.
The Gascard NG replaces the Gascard II model and is in most respects backward compatible with it. The Gascard NG has a modernised and improved main PCB giving on-board pressure correction, full temperature correction, true RS232 communications, optional LAN/TCPIP connectivity and greater all round flexibility. The new main PCB has built in features for future expansion for multi gas and multi sensor operation.
Main Features:
New electronics platform with increased power and versatility of modern microprocessors.
Backward compatible with the older generation of Gascard detectors.
Onboard Barometric Pressure Correction in the range 800mbar to 1150mbar.
Extensive Temperature compensation.
Lower operating voltage (7V) and wider operating voltage range (7V to 30V).
True RS232 communications for control and data logging. Optional onboard LAN support.
Future expansion facilities to allow addition of on-board data logging and more gas detection channels for both NDIR & chemical sensors.
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The GS Oxygen Sensor KE series (KE-25 and KE-50) is a unique galvanic cell type oxygen sensor which was developed in Japan in 1985. Its most notable features are long life expectency, excellent chemical durability, and it is not influenced by CO2. The KE series oxygen sensor is ideal to meet the ever-increasing demand for oxygen monitoring in various fields such as combustion gas monitoring, the biochemical field, medical applications, domestic combustion appliances, etc.
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The ORBISPHERE M1100 optical sensor with the ORBISPHERE 410 controller offers a new way of monitoring oxygen in beer and de-aerated water. ORBISPHERE sensors set the industry standards for oxygen measurement by offering “peace of mind” to every brew-master and quality manager.
The new ORBISPHERE M1100 maintains this tradition and offers significant operating and cost benefits.
- Lowest drift, fastest response and annual calibration
- Accuracy in ppb oxygen measurement for effective process control
- Optical technology eliminates membrane and electrolyte
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HAMILTON is the first company to offer a self-contained oxygen measurement in the popular 12 mm format similar to standard process and pH electrodes and classical sterilizable oxygen sensors. VISIFERM DO optical sensors demonstrate a number of substantial advantages because of a symbiosis of sensor and measurement amplifier- an intelligent sensor.
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Alphasense Carbon Monoxide miniature sensors operate using well-known fuel cell technology. The Alphasense CO-D series offers our unique leak-free guarantee and superior detection performance all in a diameter of 14.5mm. Only its size is reduced, not its performance or guaranteed life. The leak proof housing is colour coded for ease of identification.
Our unique ATAV test and validation system enables us to perform customised testing to customer requirements. A record of each sensor's performance is stored in our database, accessible via the sensor barcode. This can provide hard copy evidence if required and serve as a powerful diagnostic tool.
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Alphasense Hydrogen Sulfide Miniature sensors operate using well known fuel-cell technology. The Alphasense H2S-D series offers our unique leak-free guarantee and superior detection performance all in a diameter of 14.5mm. Only its size is reduced, not its performance or guaranteed life. The leakproof housing is colour coded for ease of identification.
As with all other Alphasense sensors, the use of stabilisation racks to continuously monitor every sensor during initial conditioning ensures that only sensors operating within specification are passed to the companies unique ATAV (Alphasense Test and Validation) system. This also enables us to perform customised testing to customer requirements. The key operating characteristics for every sensor are recorded against the sensor serial number, which is bar coded onto the sensor. This data can be released at the time of despatch so that full traceability is maintained.
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The Alphasense Nitrogen Dioxide range of sensors are available in both the Company's A and B series sizes and are clearly colour coded in blue moulded bodies. They provide OEM's with an alternative for use in a number of high volume applications. The sensors incorporate innovative catalyst technology, which reduces the effects of a number of common cross interference gases whilst ensuring batch to batch consistency and stable output. These sensors provide a significant improvement in stability of response with respect to transient relative humidity changes, compared to other available products. Physical robustness allows the sensors to be used in the most demanding environments.
As with all other Alphasense sensors, the use of stabilisation racks to continuously monitor every sensor during initial conditioning ensures that only sensors operating within specification are passed to the companies unique ATAV (Alphasense Test and Validation) system. The key operating characteristics or every sensor are recorded against the sensor serial number, which is bar coded onto the sensor. This data can be released at the time of despatch so that full traceability is maintained.
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Alphasense Sulfur Dioxide SO2 A series sensors are supplied in leakproof housing with clearly colour coded red mouldings. They have an operating range suitable for personal safety monitoring applications. Additional sensors with significantly higher operating and overload ranges are available to satisfy the needs of the Stack Gas Analyser market. These provide linear outputs to 5000ppm (parts per million) with overgas capacity to 10,000ppm.
The Sulfur Dioxide sensors provide OEM's with a good, reliable sensor for use in a number of high volume applications. The sensors are designed for use in both fixed head and portable instrumentation.
As with all Alphasense sensors, the use of stabilisation racks to continuously monitor every sensor during initial conditioning ensures that only sensors operating within specification are passed to the Company's unique ATAV (Alphasense Test and Validation) system. The key operating characteristics for every sensor are recorded against the sensor serial number, which is bar coded onto the sensor. This data can be released at the time of despatch so that full traceability is maintained.
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With a PID the sample gas is exposed to deep ultraviolet light from a lamp. The emitted light ionises targeted gases in the sample so they can be detected by the gas detector and reported as a concentration (ppb or ppm).
The Alphasense PID can be installed in portable and stationary gas monitors that accept either Alphasense Ltd CH-A3 or other manufactures compatible pellistor cells. Thus providing complete PID capability in a package that has the same dimensional and electrical profile as Pellistors (providing the electronics input circuit is designed to take the sensor’s output range). This opens up an incredible variety of environmental and safety applications in industrial, commercial and residential markets.
The Alphasense PID sensor is offered in two models. They are virtually insensitive to humidity changes, providing unparalleled performance in a variety of applications.
PID-A1 has a linear dynamic range of 100-ppb to 6,000-ppm (Isobutylene).
PID-AH has a linear dynamic range of 5-ppb to 50-ppm (Isobutylene).
The Sensors include a Detector with 10.6eV Lamp, Lamp Driver, Amplifier Circuitry, Removable Electrode Stack & Particulate Filter.
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The FCM6812 combustible gas sensor module is a new
unit which utilizes TGS6812, Figaro's catalytic pellistor
type gas sensor which features durability, stability, and
quick gas response. Calibrated under strictly controlled
environmental conditions at Figaro's factory, this module
provides analog output voltage proportional to hydrogen
gas concentration. FCM6812 is resin coated for
waterproofing and electrical insulation purposes, and also
is also capable of detecting sensor wire breakage. The
unit has a wide range of operating temperature from -10°
to +60°C.
Because the TGS6812 sensor can detect methane and
LP gas as well as hydrogen, this module is suitable for
gas leak detection in stationary fuel cells which use
hydrogen generated from combustible gases.
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LPM2610 - Pre-calibrated LP module
NGM2611- Pre-calibrated methane module
Figaro offers pre-calibrated gas sensor modules for residential applications using either TGS2610 (for LP gas) or TGS2611 (for methane gas) as described above. This module is calibrated in Figaro’s humidity and temperature controlled facility and includes a precisely adjusted load resistor and a temperature compensation circuit. By simply inserting this module into the mother board of a gas detector, a reliable alarm setting can be achieved while eliminating the costly gas calibration process.
* meets RoHS requirements
* maintenance free
* alarm threshold of 5~20% LEL
* meets UL1484, EN50194
* compact size (27mm x 12.5mm, 2.5g)
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Figaro has two semiconductor type air quality sensors. TGS2600 has high sensitivity to various gaseous air contaminents such as the gases found in cigarette smoke, while TGS2602 shows good sensitivity to volatile organic compounds (VOCs) and odorous gases (such as H2S). By combining these sensors with signal processing, the TGS260x series can be interfaced with ventilation and air conditioning systems to protect the air that you breathe.
TGS2600 - Gas sensor for general air contaminants
This sensor has high sensitivity to various gaseous air contaminents such as those found in cigarette smoke. It is ideally suited for the detection of the gases found in cigarette smoke and for usage in devices such as air purifiers and air conditioning systems. Compared with competing MOS sensors, TGS2600 has a longer useful life and is less costly.
TGS2602 - VOC sensor
With ultra high sensitivity to volatile organic compounds and odorous gases which can be noxious as well as presenting a variety of health hazards, TGS2602 is designed for usage in VOC monitors as well as devices for automating ventilation and air conditioning. Compared to photo ionization sensors, TGS2602 delivers higher sensitivity with longer life and lower cost.
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The sensing element is comprised of a metal oxide semiconductor layer formed on an alumina substrate of a sensing chip together with an integrated heater.
In the presence of a detectable gas, the sensor's conductivity increases depending on the gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.
The TGS 2620 has high sensitivity to the vapors of organic solvents as well as other volatile vapors. It also has sensitivity to a variety of combustible gases such as carbon monoxide, making it a good general purpose sensor.
Due to miniaturization of the sensing chip, TGS 2620 requires a heater current of only 42mA and the device is housed in a standard TO-5 package.
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The sensing element of TGS826 is a metal oxide semiconductor which has low conductivity in clean air. In the presence of a detectable gas, the sensor's conductivity increases depending on the gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.
The TGS826 has high sensitivity to ammonia gas. The sensor can detect concentrations as low as 30ppm in the air and is ideally suited to critical safety-related applications such as the detection of ammonia leaks in refrigeration systems and ammonia detection in the agricultural field.
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Features:
- Detection range of <25 to 10,000 ppm ammonia (NH3).
- High selectivity to ammonia.
- Minimal response to changing environmental humidity.
- Response is unaffected by prolonged exposures to, or high concentrations of ammonia.
- Sensor response is not affected by H2S.
Circuitry
A transducer is available from Synkera to operate the sensor. This circuit,
packaged on a 2" x 1.5" printed circuit board, is powered with 9 - 24 VDC. The transducer provides a 0 - 5 VDC output which can be adjusted for sensor offset and gain. The heater voltage is also adjustable. The circuit is set to the
recommended values at the factory.
Basic Measuring Circuit
The sensor can be operated using a simple voltage divider. This requires two voltage supplies: heater voltage (VH) and circuit voltage (VC). VH is applied to the heater in order to maintain a constant, elevated temperature, for optimum sensing.
VC is applied to allow a measurement of the output voltage (Vout) across a load resistor (RL).
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TGS 3870 is Figaro's new metal oxide semiconductor gas sensor for the detection of both methane and carbon monoxide. Using a micro-bead gas sensing structure, both methane and carbon monoxide can be detected with a single sensor element by periodic application of two different heater voltages (high and low). Miniaturization of the gas sensing bead results in a heater power consumption of only 38mW (average).
TGS 3870 has low sensitivity to alcohol vapors (a typical interference gas in the residential environment) and has high durability, making the sensor ideal for consumer market gas alarms.
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TGS2610 - LP gas sensor
TGS2610 has been widely used for more than 10 years for LP gas detection in residential and industrial gas detectors. Unlike catalytic type sensors, TGS2610 is also suitable for portable leak detectors due to its high sensitivity to very low concentrations of LP gas and its low power requirements. In addition, the sensor also has wide application in recreational vehicle and marine applications where durability against severe environmental conditions is required.
TGS2611 - Methane gas sensor
TGS2611 has established itself in the methane detection marketplace for more than 10 years. With superior durability against poisons and interferent gases when compared to competing pellistor type sensors, this sensor has found wide application in gas detectors for residential and industrial usage, portable leak detectors, as well as in natural gas vehicles where severe environmental conditions are encountered.
* UL recognized component
* compact size (TO-5 can)
* long life
* pre-sorted for easy calibration
* meets RoHS requirements
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SENSOR FEATURES:
- High sensitivity to a wide range of flammable gases.
- Non-specific response, calibration factors available upon request.
- Typical response time <1 minute to 90% full scale.
- Environmental temperature range of - 20 to 50°C.
- Minimal response to environmental humidity over the range of 0 - 95%, non-condensing
- Rugged, reliable sensor based on Synkera's exclusive technology.
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The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductor which has low conductivity in clean air. In the presence of a detectable gas, the sensor's conductivity increases depending on the gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.
The TGS 832 has high sensitivity to R-134a, the most promising alternative to R-12, commonly used in air conditioning systems and refrigerators. R-12 and R-22 are also detectable by TGS 832. With its good long term stability, TGS 832 is an excellent, low-cost sensor for CFC detection.
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TGS821 Semiconductor type
Figaro semiconductor type sensor TGS821 has high sensitivity to low concentrations of hydrogen. Even at 100ppm of hydrogen, the sensor can detect the target gas with good repeatability and long term stability. Figaro's unique sensor technology makes this sensor highly selective to hydrogen. TGS821 utilizes a durable ceramic housing that makes it ideal for industrial applications which involve transformer maintenance or usage of batteries. This sensor is also appropriate for checking gas leakage within a fuel cell system.
TGS6812 Catalytic type
Figaro's catalytic type sensor TGS6812 can detect levels of hydrogen up to 100%LEL. This sensor features high accuracy, good durability and stability, quick response, and linear output. This sensor can detect not only hydrogen but also methane and LP gas, making it an excellent solution for monitoring gas leakage from stationary fuel cell systems which use hydrogen that is transformed by combustible gases. Due to an adsorbent inside its sensor cap, the cross sensitivity of TGS6812 to alcohol is much smaller than can be found in traditional catalytic type sensors. In addition, TGS6812 is more durable against silicone compounds than the traditional catalytic type sensors.
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SENSOR FEATURES:
- High selectivity to hydrogen
- Low power operation LEL hydrogen detection (1000 ppm - 2%)
- Can be operated at room temperature (no heater power consumption)
- Can be used for ppm hydrogen detection (50 - 1000 ppm) at higher operating
temperature and power (150°C/275 mW)
- Environmental humidity range of 0 - 90%, non-condensing
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SENSOR FEATURES:
- Sensor designed to reliably detect H2S at concentrations from 1-100 ppm.
- Rugged sensor undamaged by exposure to temperature and humidity extremes.
- Fast response and complete recovery after H2S exposure.
- Large, stable, easy to measure resistance change on exposure to H2S.
- Preliminary studies indicate sensor response is stable (does not go to sleep).
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Gas sensors
