Polar H9 is the brand’s value chest strap, launched in February 2020 as a pared-back sibling to the H10 rather than its replacement.
| Manufacturer | Polar |
|---|---|
| Type | ECG chest strap heart rate sensor |
| Series | H-series |
| Released | February 2020 |
| Price at launch | GBP 52.50 / EUR 59.90 / USD 59.95 |
| Predecessor | None. H9 sits alongside the H10 as a lower-cost option, not a replacement for any earlier model. |
| Successor | Not yet announced. |
| Sizes | Adjustable strap, two size ranges: M-XXL and XS-S |
| Colours | Black |
Specifications and features as at launch, updated where the current official specification differs.
Jump to: Expert opinion | H9 versus H10 | Specifications | Features | Further reading
Expert opinion
H9 shares its pod with the H10 and differs only in strap and connection count. Polar has said the strap, not the electronics, accounts for the accuracy difference between the two: the H10’s PRO strap carries an additional electrode strip and silicone grip dots that the H9’s SOFT strap lacks. The pods are interchangeable between straps from either model.
H9 supports one active Bluetooth Smart connection at a time, against two on the H10, and cannot cache a workout at all; the H10 caches a single session via the Polar Beat app. Both share ANT+ compatibility and 5kHz GymLink for live underwater transmission to a paired Polar watch. Like the H10, the H9 or H7 is required for Polar’s orthostatic test; other HRV-capable Bluetooth chest straps will not work for that protocol.
H9 versus H10
- H9 supports one simultaneous Bluetooth Smart connection; H10 supports two
- H9 cannot cache a workout; H10 caches one session, up to 65 hours, via the Polar Beat app
- H9 uses the older Polar SOFT strap, carried over from the H7; H10 uses the newer PRO strap with additional electrodes and silicone grip dots
- H9’s SOFT strap has a simpler, easier-to-use clip mechanism than the H10’s PRO strap
- Both share the same pod, the same ECG sensor, ANT+ compatibility and 5kHz GymLink
- H9 is priced below the H10 at launch and at current RRP
Specifications
| Physical | |
|---|---|
| Dimensions | 65 x 34 x 10mm (pod) |
| Weight | 60g total (connector 21g, strap 39g) |
| Case material | Plastic |
| Strap material | Soft textile, no grip dots. Identical to the older H7 strap. |
| Water rating | WR30 |
| Sensors | |
| HR measurement method | ECG (electrocardiogram) |
| Connectivity | |
| Bluetooth | Bluetooth LE, one active connection |
| ANT+ | Yes |
| 5kHz GymLink | Yes. Live underwater transmission to a compatible Polar watch. |
| Broadcast range | 90m |
| Onboard caching | None |
| Battery | |
| Type | CR2025 coin cell, user-replaceable, non-rechargeable |
| Battery life | Up to 400 hours, roughly one year at one hour of training per day |
Features
- Required, alongside the H10 or H7, for Polar’s orthostatic test and HRV-based recovery features on Vantage and Grit X watches
- ANT+ compatible
- 5kHz GymLink for live underwater transmission to a paired Polar watch
- Machine-washable strap
- Compatible with third-party apps and gym equipment via Bluetooth broadcast
- Pod interchangeable with H10 and H7 straps
- No onboard caching. A workout is lost if the paired device or app is out of range.
Further reading
Related sensors
- Polar H10, the same pod with a more capable strap, dual Bluetooth connections and onboard caching.
- Polar Verity Sense, Polar’s optical armband alternative for those who prefer not to wear a chest strap.
