Analysis of information sources in references of the Wikipedia article "Polar Electro" in English language version.
The Finnish company Polar Electro, founded in 1977, was the first to sell wireless heart rate monitors for athletes and still dominates this market.
The origins of the Finnish sports instruments producer Polar Electro can be traced back to the need of cross-country skiing ... By the year 1982, the technology had advanced to the point that the first wireless heart rate monitor was ready.
Polar introduced the first wireless heart rate monitor using electric field data transfer—the Sport Tester PE 2000. The next year, the company came out with a device containing a computer interface—the Sport Tester ...
In 1982 Polar Electro Oy introduced the world to the first wireless heart rate monitors. These first generation heart rate monitors (the "PE 2000s") were released onto the market and readily accepted by athletes, particularly at the elite and ...
1982 Polar lanceert de Sport Tester PE2000, de eerste draadloze hartslagmeter
