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Biometry: Polar OH1 measures the pulse on the upper arm

Saturday, September 2nd, 2017 | Gadgets

Polar is actually a pioneer when it comes to measuring the heart rate in sports with chest straps – which works via a directly tapped electrical pulse and is particularly accurate. At the Ifa 2017 in Berlin, the company presented a wearable device called OH1, which determines the pulse with an optical procedure on the upper arm.

        
    Polar OH1 (Image: Polar)

The system is basically the same as in the heart rate measurement on the wrist, which is now standard in many Smartwatches and Fitnesstrackern. Polar uses six green LEDs in the OH1 as well as his M430 and M600 sports clocks and a sensor that analyzes the changes in blood flow to the pulse.
The Polar OH1 is not worn on the wrist, but on the upper arm. Advantage: There the device sits more quietly, so it is less easy to measure errors. The small company Scosche has long been offering a heart rate monitor called Rhythm +, which basically uses the same principle and whose results are as reliable as those measured by a classic chest strap – the Rhythm + is particularly popular with endurance athletes.
Data exchange via Bluetooth
The OH1 can send its data to any Bluetooth-LE compatible device – Polar Sports Watch and bicycle computer, the Polar Beat app for gathering GPS information, as well as other manufacturers' hardware, such as the gym. If you like, you can also use the OH1 to record your pulse when swimming. According to Polar, the water resistance is indicated with a depth of up to 30 meters.
The Wearable has an integrated memory that can store up to 200 hours of training data – then it can then be transferred to the manufacturer's PolarFore. The battery should hold about twelve hours, the firmware should be able to be updated by WLAN. The Polar OH1 is fixed by means of a cloth tape and is to be available from mid-September 2017 for around 80 euros.

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