GAS DETECTION 37
Cost effective, flame sensors offer rapid response with improved detection range
Laser Components has specialised in IR sensors for use in flame detection instruments, since opening their doors for business back in 1982. They manufacture lead sulphide detectors at their assembly plant in Arizona and pyroelectric detectors in Florida. A flame
will flicker randomly at a rate between 1 and 20Hz when it is burned naturally, modulating any IR signal generated. Pyroelectric and lead sulphide detectors sense this modulated IR light and so can provide a warning of the presence of a flame.
Laser Components’ PB25 PbS detector is a cost effective sensor for this application and generates a response to the presence of a flame in 30ms at ranges of up to 65 metres. The signal to noise characteristic of the IR sensor determines the range and sensitivity of the flame detection instrument and Laser Components have recently added a differential pyroelectric detector to their portfolio of sensors with improved signal to noise performance. This new product provides flame detection appliance manufacturers with an innovative detector with improved range and immunity to electromagnetic interference.
Exclusive, global distribution agreement for award winning piezoelectric gas detection, monitoring and analysis pump
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ION Science has confirmed an exclusive agreement with TTP Ventus to distribute its award-winning Disc Pump™ to the global gas detection market. The micropump platform offers a wide range of innovative features designed to deliver ultrafast millisecond response and more sensitive detection of gases including volatile organic compounds (VOCs).
An excellent fit with Ion Science’s market-leading photoionisation detection sensors (PIDs), the lightweight TTP Ventus piezoelectric pump offers key features for
the gas detection, monitoring, analysis and sampling industries including silent, vibration-free operation, exceptional pressure and flow, true pulsation-free flow, fast response to set-point changes, high precision controllability and resistant to magnetic fields.
These benefit many applications by allowing, simpler instrument design – especially for chromatographic systems, lower limits of detection, real time capability to respond to trigger conditions, intermittent sampling against pressurised lines, and improved user experience in wearable applications.
The agreement between the two hi-tech businesses covers two Disc Pump product lines: the XP Series provides a combination of performance and efficiency benefits with a wide temperature range from -25 up to 55°C for supporting the most demanding applications whilst the BL Series is a lower cost, entry-level version.
Tom Harrison, Business Development Manager at TTP Ventus comments: “We are excited to partner with Ion Science to offer our Disc Pump to the global gas detection industry. It represents an opportunity to accelerate our growth in this previously untapped market by leveraging Ion Science’s extensive experience, worldwide presence and technological expertise.”
Duncan Johns, Managing Director at Ion Science adds: “The TTP Ventus Disc Pump is truly revolutionary making it an excellent fit with our well proven MiniPID sensor technology. Offering these complementary products under one roof helps us to respond to the ever increasing demand for rapid, sensitive detection of VOCs. We are confident the relationship will be a success and look forward to it further strengthening our position in the global gas detection market.”
The TTP Ventus Disc Pump is already widely used across a range of markets including medical, life science, environmental and defence. It offers two pumping chambers which are configured at the point of manufacture either in series for high pressure applications, or parallel for higher flow.
Most piezoelectric gas pumps rely on the movement of piezo actuator to compress the gas in a cavity which increases its pressure. Such ‘displacement’ pumps have limited performance because the movement of piezo actuators is very small.
By instead creating a standing wave TTP Ventus is able to deliver much greater pressure and flow than traditional piezo pumps. Further, Disc Pump operates at ultrasonic frequencies making it completely silent.
Turning an ultrasound standing wave into useful pumped flow requires a highly specialised valve, able to respond in a matter of microseconds. The patent-protected Disc Pump achieves this delivering unrivalled pneumatic performance.
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WWW.ENVIROTECH-ONLINE.COM AET ANNUAL BUYERS’ GUIDE 2020 We make a whole world of sense.
At Alphasense we are pledged to produce the safest, most reliable gas sensors in the world.
Every product is exhaustively tested and we consistently have the lowest warranty returns in our industry.
Our continuous investment programme puts us at the forefront of research and technology in our sphere.
Finally, our commitment to the environment extends across the manufacture and disposal of our entire range. So ask yourself: Would it really make sense to buy anything else?
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New series of single-gas monitors offer reliability even under harsh conditions
With Pac 6000, 6500, 8000 and 8500, Dräger now offers a new series of personal single-gas monitors. The monitors detect not only the standard gases carbon monoxide (CO), hydrogen sulphide (H2 (SO2
S), sulphur dioxide ) and oxygen (O2 ) (Pac 6000 and 6500), but also special gases such as
ozone, phosgene and nitrogen dioxide (Pac 8000 and 8500). In addition, Pac 8500 is also available with a dual sensor for H2
S/CO or O2 /CO, and a
hydrogen-compensated CO sensor. This significantly reduces the influence of hydrogen on the indication of carbon monoxide.
As quick and reliable gas measurement is extremely important in an industrial environment, the monitors of the Pac series provid e quick, precise and reliable results, and are very easy to use. Users can choose between 18 long-life sensors for up to 33 gases. The industrial battery used in the monitors enables a service life of two years without a battery change. Existing accessories can also be used with the new monitors.
The integrated “D-Light” shows the user whether the monitor is functional and ready for operation. In addition to the current gas concentration, the large display also provides other important information, such as battery capacity, target gas or remaining service life.
The Pac series withstands even harsh operating conditions. The sensors can be used in a temperature range from -40 to +55°C. An easily replaceable membrane filter protects the sensor against foreign substances such as dust or liquids. The impact and chemical-resistant housing meets the requirements of IP68. Each sensor variant is identified by a colour code. This means that mix-ups are practically impossible.
Pac series monitors display the respective highest concentration measured. Alarms are issued acoustically, optically and with a perceptible vibration, and users can access acknowledged alarms at a later time.
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