Communications/Telemetry
relevant. Following the above consideration of the connectivity for cloud applications, the sites to be connected directly are oil fields and labs, exploration and drilling sites and labs, at the same time all of them with a company headquarters and its ERP system, the CAD system, the logistics and finance administration. Of course, it would be possible to connect any two of these sites with a direct point-to-point link in single hop via the satellite. Tis requires each site to select the right path to the respective other site(s). As soon as we talk about more than three sites this connectivity becomes expensive. Its capacity is constrained – and wasted when not fully used, because no other connection can use it. All those issues are avoided when using
SKYWAN 5G. Te 5G terminal provides an integrated router and transmits all data or voice directly to the destination. Te time to arrive at the other site is never more than 250msec, and the throughput can be up to 20Mbit/s user data rate in all directions. Te satellite capacity is not
dedicated to just one connection between each two points, but it is shared between all sites. Overall, the end-to-end efficiency in time, capacity use, Bit/Hz, and overall cost is unbeatable. At the same time, each site can have higher peak data rates and blocking-free reachability of all sites it needs to communicate to, at all times in parallel. Integrated user terminals, onshore, offshore, mobile, transportable, or on-the-move, can reach all relevant company sites in single hop. SKYWAN 5G fulfils all the requirements mentioned above – and that at a very low investment and low operational costs. SKYWAN 5G ensures connectivity, performance, quality of service and a degree of reliability that was never reached before. All a user needs is one type of hardware and they are prepared for all challenges ahead. l
For more information ✔ at
www.engineerlive.com/iog
Arzu Evlek is with ND SatCom, based in Immenstaad, Germany.
www.skywan5g.com
Submersible hydrostatic level transmitters A
range of slimline submersible hydrostatic transmitters for depth and level measurement
applications is now available from instrumentation specialist Impress Sensors & Systems. The VersaLine VL4500 series of titanium-housed, submersible pressure transmitters is specially designed for depth and level measurements of ground, surface, waste and seawater. Typical applications include small size boreholes, wells, dams, irrigation, sewage lift stations, rivers, estuaries and oceanography. These pressure transmitters benefit from a titanium housing that provides protection from virtually any harsh environment, particularly seawater, brackish (briny water) and aggressive chemicals where stainless steel is deemed unsuitable. The standard polyurethane vented cable is
moulded to the transmitter, providing the highest integrity waterproof assembly, which is already well proven in thousands of installations worldwide. In deep water or deep well applications, where longer length cables up to 1,500m are required, Kevlar cable can be specified, which avoids cable elongation. FEP cable is also available as an option for harsh environments. The sensing technology on the VL4500 series is a highly stable Piezoresistive element, which is manufactured from micro-machined silicon. The
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www.engineerlive.com
sensing element is isolated from the media by a titanium diaphragm, which provides high reliability in longterm installations. Reliability is further enhanced by an anti-shock nose cone, specifically designed to protect against water hammer (ie a pressure surge or wave) and other external hazards.
sewage, intrinsically safe transmitters for hazardous environments.” Supplied with a five-year corrosion warranty, the series operates in temperatures from -20°C to +80°C. Pressure ranges are 1mWG to 200mWG. Combined accuracy (non-linearity, hysteresis and repeatability) is +/-0.1% FS (BSL) and +/-0.25% FS (BSL). Other VersaLine products provide smaller
size (3/8in diameter), clog-free (for raw sewage applications), intrinsic safety approvals (for hazardous environments) and many other features and configurations. An extensive range of accessories for the
Sam Drury from Impress Sensors & Systems
comments: “With a choice of millivolt [low power] or current [4-20mA] configurations¸ small physical size and a wide range of pressures, the VL4500 series will satisfy most applications for water level monitoring and control. We can also provide other sensors from our VersaLine series that include even smaller sizes, clog-free transmitters for raw
VersaLine series is available, including sink weights, cable hangers and a unique method of avoiding water ingress through the breather tube for vented gauge transmitters. Other options include calibration adapters, lightning protection, cable termination boxes and HART communications protocol. UK-headquartered Impress Sensors is an
ISO 9001 accredited company, with over 25 years experience in instrumentation design and manufacturing for a hugely diverse range of applications. l
For more information visit
www.impress-sensors.co.uk
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