Monitoring & metering
ROBUST MAGNETIC ENCODERS OFFER INCREASED FLEXIBILITY
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for this application included features such as high selectivity for ammonia, fast response time, low maintenance/ calibration requirement, long-term reliability, and the ability to measure a hot/wet gas continuously. Stephane Canadas says: “TDLS meets all of these requirements, so we built the analyser into our Series 4 range, which provides customers with a host of other advantages. Not least of which is the provision of a detachable Tablet, that enables users to operate the analyser wirelessly from a convenient location nearby, using the instrument’s built-in Wi- Fi. This is an extremely popular feature with engine developers.” In addition to wireless connectivity
between the analyser and the Tablet, all Series 4 instruments are supplied with software providing simple and secure access via RS232 or Ethernet at any time, from anywhere. “This means that engine developers can check the progress of their work, without having to be physically present in their workplace,” Canadas adds.
AMMONIA COMBUSTION Ammonia has different combustion properties to most traditional fuels, which is why research is necessary to develop a suitable combustion method. For example, ammonia burns more slowly, so it is important to ensure that significant amounts of ammonia are not emitted in the exhaust. Not only is ammonia toxic, but it also has an unpleasant odour.
The combustion of ammonia should
ideally produce harmless emissions containing just nitrogen and water. However, it will be necessary for engine developers to continuously monitor the ammonia content of prototype engines’ emissions to ensure that ammonia
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combustion is complete. In addition, it is necessary to measure NOx gases, because these gases are harmful to the environment and human health. For example, the combustion of ammonia
can generate nitrous oxide (N2O), a GHG even more potent than CO2. Signal Group’s customers therefore
also operate the S4 Quasar Heated vacuum Chemiluminescence NOx analyser, or the S4 Pulsar NDIR Multi-gas analyser if a broader spectrum of gases needs to be measured.
SUMMARY Green hydrogen provides an opportunity to harness excess renewable energy, and when converted to ammonia, it can be easily stored and transported. Similarly, blue ammonia may represent a viable alternative. Technically, it is possible to reform ammonia into hydrogen, but it may be more efficient to develop engines that are able to run on ammonia. Global ammonia distribution and storage infrastructure is already in place; to meet the needs of agriculture and industry, but significant upscaling will be necessary if ammonia is to become a sustainable fuel. In addition, new regulations will be necessary in order to protect safety, prevent harmful emissions, and optimise reductions in GHG emissions.
Ammonia is one of the most promising clean energy sources; reducing reliance on fossil fuels, whilst requiring less storage space and energy than hydrogen. The development of engines that can run on ammonia is therefore vitally important, so the availability of an ammonia analyser designed specifically for this application, is a major advantage for researchers and engine developers.
Signal Group
www.signal-group.com With its freely definable pulse count, Wachendorff’s
new WDGP series encoder offers users a convenient alternative against standard output options that may lead to more complex control electronics or software calculation. Application flexibility is also aided with an input power requirement from 4.75 to 32V DC, which is reverse polarity and short circuit protected. The maximum pulse frequency is 600kHz for the HTL version whilst the TTL option offers 1MHz. The HTL variant also offers inverted output signals. The 36mm diameter model is available with a choice of servo flange, round flange, and screw flange mountings – a special servo flange version includes IP67 + IP69K protection rating for use in high pressure washdown/steam cleaning applications. A version with an elevated radial and axial shaft loading to 300N is also offered. The 58mm diameter model is currently available with servo flange or clamping flange options. Both sizes offer a choice of shaft diameters; a custom design service can be made available for OEM applications. The new WDGP encoder is based on the same
robust and durable mechanical design used across Wachendorff’s wide range of rotary encoders. Generous axial and radial shaft loading and a wide operating temperature range of -40°C to +85°C combine for durability, high reliability, and long life for the most extreme rotary position feedback tasks in heavy engineering, off road vehicles, agricultural machinery and more.
Variohm EuroSensor
www.variohm.com April 2022 Instrumentation Monthly
achendorff Automation, the encoder and measurement systems manufacturer, has launched a new variant of its well-proven
industrial grade rotary encoders that feature a freely definable pulse count. The new WDGP series, available in the UK from Variohm EuroSensor, offers any number of output pulses from 1 to 16,384 PPR as TTL or HTL quadrature A and B channels, plus a freely configurable zero pulse (N). Utilising IP67 protection class stainless-steel housings in a choice of 36mm and 58mm diameters with industry-standard mounting options, these high accuracy incremental encoders are based on a patented magnetic sensor technology that offers durability and extremely high resistance to shock, vibration and undesirable shaft loading.
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