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Polar OH1 Optical Heart Rate Sensor

Polar OH1 Optical Heart Rate Sensor

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Polar OH1 is an optical heart rate monitor armband that combines versatility, comfort and simplicity. It fits comfortably around your arm and tracks heart rate with Polar's high-quality optical heart rate solution.

With Polar OH1, nothing stands between you and your goals.

Features & Benefits

  • Optical Heart Rate Tracking
    Polar OH1 tracks your heart rate with Polar’s high-quality 6-LED optical heart rate solution.
  • Heart Rate Sensor Mode
    You can use Polar OH1 to broadcast your heart rate to any Bluetooth-compatible Polar device, many fitness apps and Bluetooth-compatible gym equipment.
  • Bulit-In Memory
    Polar OH1 has a built-in memory that can store up to 200 hours of training data. You can sync your data to Polar Flow with both the Polar Flow app and web service.
  • Comfortable Textile Armband
    The Polar OH1 armband fits snugly, comfortably and discreetly around your arm. The band is made of a soft textile material and is machine-washable.
  • Updatable Firmware
    Polar OH1 keeps on improving with over-the-air updates.
  • Long Battery Life
    With Polar OH1 you get up to 12 hours of training time on a single charge. You can charge the battery easily with the Polar OH1 USB adapter (included).
  • Waterproof
    Polar OH1 is waterproof up to 30 m.

  • Specs


  • Weight - Sensor 5 g, armband 12 g
  • Height - 9.5 mm
  • Diameter - 29.85 mm
  • Armband - Size M-XXL, machine-washable
  • Compatibility

  • iOS mobile devices: iPhone 4S and later; Android mobile devices with Bluetooth 4.0 capability and Android 4.4 or later.
  • Updates

  • Via Polar Flow
  • Memory

  • 4 MB, up to 200 hours of training time
  • Battery

  • Rechargeable 45 mAh lithium polymer battery
  • Water Resistance

  • 30 m
    • Does what I wanted

      Review by Bryan S (Posted on 12/5/18)

      In short: accurate, comfortable, good battery life & reasonably priced.

      I've been very happy with the Polar OH1. It's my first heart rate monitor. I wanted a monitor that I didn't have to wear on my chest, but that was more accurate than the wrist-based monitors. I just wanted a monitor, didn't want a smart watch which would have cost much more and not been as accurate. I've been very happy with the accuracy - cycling, running, gym, or any activity that I've tested it on, it seems very accurate and isn't affected by bouncing or jarring motions. It's comfortable to wear either on my forearm or bicep, and it seems to work a variety of other places including my legs an even on my hands, though I haven't tested it extensively in those other locations.

      In use, I can get at least 10 hours of continuous monitoring while connected to my phone. My only complaint is that the battery slowly dies between uses, as if it never completely turns off.

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