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The forward scatter sensor uses a beam of infrared light which is sent from one end of the sensor toward the receiver, but offset from a direct line to the receiver by a certain angle. The amount of light scattered by particles in the air and received by the receiver determines the extinction coefficient.
The reed switch [i] is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [ 1 ] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay.
SFR TV is a television service accessible on La Box de SFR and La Box Fibre de SFR, which delivers television programs via the broadband internet telephone network , high-speed internet (FTTH or FTTB fiber within Numericable). The service was also broadcast by satellite with SFR Sat available on the Astra 19.2°E satellite until October 2015.
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Speedlite 270EX (introduced in March 2009 [10]) and 270EX II (introduced in February 2011 [11]) are compact entry-level flashes with a guide number of 27 m (ISO 100).. 270EX features a zoom head which covers 28–55 mm lenses and bounce head capability. 270EX II adds wireless slave mode and remote shutter triggering.
A Class-5 telephone switch is a telephone exchange in the public switched telephone network (PSTN) that directly serves subscribers and manages subscriber calling features. Class-5 services include basic dial-tone , calling features , and additional digital and data services to subscribers connected to a local loop .
In late 1937, Maurice Elie at SFR developed a means of pulse-modulating transmitter tubes. This led to a new 16-cm system with a peak power near 500 W and a pulse width of 6 μs. French and U.S. patents were filed in December 1939. [62] The system was planned to be sea-tested aboard the Normandie, but this was cancelled at the outbreak of war.
The Volkswagen Golf Mk1 is the first generation of a small family car manufactured and marketed by Volkswagen.It was noteworthy for signalling Volkswagen's shift of its major car lines from rear-wheel drive and rear-mounted air-cooled engines to front-wheel drive with front-mounted, water-cooled engines that were often transversely-mounted.