---
product_id: 180724275
title: "H9 Heart Rate Sensor"
brand: "polar"
price: "€ 133.54"
currency: EUR
in_stock: true
reviews_count: 8
category: "Polar"
url: https://www.desertcart.sk/products/180724275-h9-heart-rate-sensor
store_origin: SK
region: Slovakia
---

# Adjustable soft chest strap XS-XXL Bluetooth + ANT+ + 5 kHz multi-connectivity 400 hrs battery life H9 Heart Rate Sensor

**Brand:** polar
**Price:** € 133.54
**Availability:** ✅ In Stock

## Summary

> ❤️‍🔥 Stay ahead of your heart game with Polar H9 – precision that moves with you!

## Quick Answers

- **What is this?** H9 Heart Rate Sensor by polar
- **How much does it cost?** € 133.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/180724275-h9-heart-rate-sensor)

## Best For

- polar enthusiasts

## Why This Product

- Trusted polar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Gold Standard Accuracy:** Trusted by researchers & athletes worldwide for precise heart rate tracking.
- • **Ultra-Long Battery Life:** Up to 400 hours of uninterrupted monitoring with included CR2025 battery.
- • **Comfort Meets Durability:** Soft, breathable strap designed for all-day wear and intense workouts.
- • **Seamless Multi-Device Sync:** Connects effortlessly to smartphones, fitness gear, and popular apps via Bluetooth & ANT+.
- • **Real-Time Insights Anywhere:** Turn your phone into a powerful fitness tracker with Polar Flow and third-party app compatibility.

## Overview

The Polar H9 Heart Rate Sensor is a high-accuracy, multi-connectivity chest strap monitor offering up to 400 hours of battery life. Compatible with a wide range of devices and apps via Bluetooth, ANT+, and 5 kHz, it delivers reliable heart rate data for everyday fitness and professional training. Designed with a soft, adjustable strap for all body sizes, the H9 combines comfort with durability, making it the gold standard choice for millennial professionals seeking precise biometric insights on the go.

## Description

Polar H9 is the ideal jack-of-all-trades heart rate monitor Get reliable heart rate thanks to chest strap measurement. Battery life is 400 hours. Polar H9 heart rate monitor works not only with Polar Flow app and many 3rd party apps, but also with a large variety of equipment. This is due to Bluetooth, ANT+ and 5 kHz technologies, which can also be active simultaneously. Choose you size:XS-S: 20 inches - 26 inchesM-XXL:26 inches - 36 inchesPlease note, there is a protective film over the HR sensor, please remove prior to use.

Review: Perfect app; strap needs DIY modifications; works great with my old polar watch - The strap sucks. If you have no lats, maybe it won't slide down your body as you run. But for those of us with big lats, you have to modify this thing. You can either modify the strap, or buy the $40 Polar Pro chest strap (you’ll have to replace any strap you get probably every 6-12 months so keep that in mind). I haven't tried the outrageously-priced Polar Pro but it's the only one on the market that has grips all the way around the strap, not just in the front. The chest strap can be easily modified as follows: Buy one of the "zig zag silicone grip wave bands" you can find online, and sew it (or use fabric glue or something) to the inside of your Polar chest strap and it actually stays in place while running! Just make sure you get the strap customized to your underchest first, and give yourself some space for the inevitable long-term loosening of the strap (you might need to tighten it gradually over time). Without the extra grip, you have to find the perfect balance through much trial and error between too tight and too loose. Too tight, and it creates a little cavity where the electrodes are between the strap and your chest (so it gives you terrible readings, if any). Too loose, and it falls down to your waist. I also found that using a small dab of electrode gel on each of the two electrodes on the back side of the chest strap (enough to cover just the two circles on the strap where the strap touches your chest) makes a huge difference in getting a consistent, accurate, read. Don't use water, it just doesn't work nearly as well. I love the Polar Beat app it comes with! It was the best free app I could find for Android for a heart rate monitor. I'm sure there are probably better paid ones out there but I didn't try any of them so can't attest. The Polar Beat app gives you a graph at the end of your workout that shows your heart rate over time, and tells you how many minutes and seconds you spent in each of the 5 heart rate zones (50%-60% of max heart rate = zone 1; 90-100% = zone 5). It has certain modes that track your GPS location for accurate maps of your runs/rides and the app will tell you every mile when running how long your mile took, your pace, and average heart rate. I've never used it for a bike ride. It also tracks calories very well and whenever it doesn't get an accurate read, it does a pretty good job "guessing" (better than the old Polar Watch I have). If I start my workout on the Polar app first, THEN start the workout on my Polar watch, it will let me use both to track my workouts which is great. That way I can leave my phone in my gym bag while running around the track, and use the watch instead to track % of max heart rate. It's also nice when using my phone for anything else while I'm doing a HIIT circuit or on the exercise bike, that way I can just look at my watch to see my stats. I don't have a smart watch so can't comment on how it works with that. I think you might need to get the latest and greatest to pair it to two or more smart devices at once. But this one works perfectly for one smart device and one dumb device.
Review: Better than Garmin HRM Dual - I've only owned this for about 2 months now, with about 3 - 4 hours of intense sweat contact per week. But my impressions so far it's better than Garmin HRM Dual that lasted around 1.5 year with similar use pattern. The Garmin had noticeable corrosion on metal contacts, the metal buttons on strap was separating, would drop connections frequently towards end of life, and the ultimate failure points around screws on plastic unit seemed to be a silly design flaw. Unless the Garmin was a case of planned obsolescence, in which case kudos to that Garmin engineering team, it was an inferior product compared to the Polar. The Garmin failed because the thin plastic pieces beneath the tiny screw heads cracked and crumbled away so back cover could not hold battery in place. Seal was broken and the internals corroded to failure. All those weak points on the Garmin seem to be addressed on the Polar. In addition, the Polar actually pairs better with my Garmin products more quickly, consistently, and easily without having to wet the strap when I first put it on. Polar strap is a little narrower but for me its more comfortable because of softer elastic fabric. Minor downsides, the Polar strap loop and hook is not as robust and easy to use and narrower strap sometimes gets a little bunched up.

## Features

- 38% Polyamide, 29% Polyurethane, 20% Elastane, 13% Polyester
- Made in the USA or Imported
- POLAR PRESENTS A NEW AFFORDABLE HRM: When you're looking for a reliable high quality heart rate monitor for your everyday use, Polar H9 is a trusted choice of HR sensor that fulfills all your needs.
- GOLD STANDARD IN HEART RATE TRACKING: Built on decades of scientific research and development, recognized by both regular users and researchers around the globe, Polar is proud to be the Gold Standard in HR tracking.
- WORKS WITH EVERYTHING: Polar H9 works with ALL HRM compatible Equipment.
- MORE EFFECTIVE: Track your heart rate with Polar's high accuracy sensors. Choose you size: XS-S: 20" - 26", M-XXL: 26” - 36”
- TURN YOUR PHONE INTO A TRACKER: Enjoy endless connection possibilities with popular apps on your smartphone.
- BATTERY: A CR2025 button cell battery must be used in the Polar H9 (included). Other battery sizes may cause damage to, and malfunction of the sensor.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08411DQ96 |
| Battery Average Life | 400 Hours |
| Battery Description | Lithium-Ion |
| Best Sellers Rank | #3,064 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #8 in Heart Rate Monitors (Sports & Outdoors) #3,320 in Cell Phone Accessories |
| Brand | POLAR |
| Brand Name | POLAR |
| Color | Black |
| Compatible Devices | Desktops, Laptops, Smartphones, Tablets |
| Customer Reviews | 4.0 out of 5 stars 9,520 Reviews |
| Display Size | 0.96 Inches |
| Included Components | Polar H9; soft strap; getting started guide |
| Item Dimensions L x W x H | 25.98"L x 0.39"W x 1.34"H |
| Item Type Name | Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap |
| Item Weight | 60 Grams |
| League Name | Polar |
| Manufacturer | Polar |
| Material | Polyester |
| Material Type | Polyester |
| Model Number | 92081565 |
| Product Dimensions | 25.98"L x 0.39"W x 1.34"H |
| Screen Size | 0.96 Inches |
| Sensor Type | Wearable |
| Team Name | Polar H9 |
| UPC | 725882053929 |
| Unit Count | 1 Count |
| Warranty Description | 2 year manufacturer |

## Product Details

- **Battery Description:** Lithium-Ion
- **Battery Life:** 400 Hours
- **Brand:** POLAR
- **Color:** Black
- **Compatible Devices:** Desktops, Laptops, Smartphones, Tablets
- **Item Weight:** 60 Grams
- **Material:** Polyester
- **Product Dimensions:** 25.98"L x 0.39"W x 1.34"H
- **Screen Size:** 0.96 Inches
- **Sensor Type:** Wearable

## Images

![H9 Heart Rate Sensor - Image 1](https://m.media-amazon.com/images/I/51LhhgJ+1lL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is the H9 a newer version than the H10?**
A: The Polar H9 is the latest addition to the selection of heart rate sensors from Polar. It was designed as a more cost effective entry to the world of heart rate training. It differs from the H10 in that it does not have the internal memory of the H10 and is packaged with a different style of chest strap from the H10. - Mike<>PolarUSA

**Q: Is this compatible with Apple Watch series 5?**
A: Yes, the Polar H9 is compatible with the series 5 Apple Watch. - Mike<>PolarUSA

**Q: when using the h9, does the app on my phone save the data?**
A: Hi Jim, during training the file is saved locally and then uploaded to your Flow account which uses cloud storage to avoid slowing down your phones performance. If you want to keep a history of your Training Sessions please create an account after installing the Polar Beat application. If an account is not created the Training Sessions stored in Polar Beat will eventually be deleted.

**Q: Can you check your heart rate between laps swimming?**
A: The H9 will need to be paired to a compatible watch that receives via the 5 kHz coded frequency (such as the Polar A300 or V800). - Mike<>PolarUSA

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect app; strap needs DIY modifications; works great with my old polar watch
*by B***D on May 30, 2025*

The strap sucks. If you have no lats, maybe it won't slide down your body as you run. But for those of us with big lats, you have to modify this thing. You can either modify the strap, or buy the $40 Polar Pro chest strap (you’ll have to replace any strap you get probably every 6-12 months so keep that in mind). I haven't tried the outrageously-priced Polar Pro but it's the only one on the market that has grips all the way around the strap, not just in the front. The chest strap can be easily modified as follows: Buy one of the "zig zag silicone grip wave bands" you can find online, and sew it (or use fabric glue or something) to the inside of your Polar chest strap and it actually stays in place while running! Just make sure you get the strap customized to your underchest first, and give yourself some space for the inevitable long-term loosening of the strap (you might need to tighten it gradually over time). Without the extra grip, you have to find the perfect balance through much trial and error between too tight and too loose. Too tight, and it creates a little cavity where the electrodes are between the strap and your chest (so it gives you terrible readings, if any). Too loose, and it falls down to your waist. I also found that using a small dab of electrode gel on each of the two electrodes on the back side of the chest strap (enough to cover just the two circles on the strap where the strap touches your chest) makes a huge difference in getting a consistent, accurate, read. Don't use water, it just doesn't work nearly as well. I love the Polar Beat app it comes with! It was the best free app I could find for Android for a heart rate monitor. I'm sure there are probably better paid ones out there but I didn't try any of them so can't attest. The Polar Beat app gives you a graph at the end of your workout that shows your heart rate over time, and tells you how many minutes and seconds you spent in each of the 5 heart rate zones (50%-60% of max heart rate = zone 1; 90-100% = zone 5). It has certain modes that track your GPS location for accurate maps of your runs/rides and the app will tell you every mile when running how long your mile took, your pace, and average heart rate. I've never used it for a bike ride. It also tracks calories very well and whenever it doesn't get an accurate read, it does a pretty good job "guessing" (better than the old Polar Watch I have). If I start my workout on the Polar app first, THEN start the workout on my Polar watch, it will let me use both to track my workouts which is great. That way I can leave my phone in my gym bag while running around the track, and use the watch instead to track % of max heart rate. It's also nice when using my phone for anything else while I'm doing a HIIT circuit or on the exercise bike, that way I can just look at my watch to see my stats. I don't have a smart watch so can't comment on how it works with that. I think you might need to get the latest and greatest to pair it to two or more smart devices at once. But this one works perfectly for one smart device and one dumb device.

### ⭐⭐⭐⭐⭐ Better than Garmin HRM Dual
*by B***1 on November 6, 2024*

I've only owned this for about 2 months now, with about 3 - 4 hours of intense sweat contact per week. But my impressions so far it's better than Garmin HRM Dual that lasted around 1.5 year with similar use pattern. The Garmin had noticeable corrosion on metal contacts, the metal buttons on strap was separating, would drop connections frequently towards end of life, and the ultimate failure points around screws on plastic unit seemed to be a silly design flaw. Unless the Garmin was a case of planned obsolescence, in which case kudos to that Garmin engineering team, it was an inferior product compared to the Polar. The Garmin failed because the thin plastic pieces beneath the tiny screw heads cracked and crumbled away so back cover could not hold battery in place. Seal was broken and the internals corroded to failure. All those weak points on the Garmin seem to be addressed on the Polar. In addition, the Polar actually pairs better with my Garmin products more quickly, consistently, and easily without having to wet the strap when I first put it on. Polar strap is a little narrower but for me its more comfortable because of softer elastic fabric. Minor downsides, the Polar strap loop and hook is not as robust and easy to use and narrower strap sometimes gets a little bunched up.

### ⭐ Unreliable product — worse customer service
*by A***R on October 13, 2025*

I had previously owned Garmin HRMs and only switched to Polar for Bluetooth connectivity with gym equipment, which Polar has and Garmin doesn’t. “Even a broken clock works twice a day”…that about sums it up with this Polar HRM. Worked for a couple of months but then started getting wildly inaccurate readings…if I was training at around 140 BPM, it would inexplicably spike and report 180 BPM and other times report something very low or even 0, as it it we’re disconnected. I did everything right: I used new 2025 batteries, dampened the strap before use, properly wore the strap snugly on the correct part of my chest, gently washed it with mild soap after each use, etc. Polar doesn’t have a customer service phone number that I could find, but I was able to find an email address. After a few back and forth emails — where I had to jump through hoops to troubleshoot the problem — they suggested I send both the strap and the sensor back to them for checking. A week or two later, I received a new sensor and a note that said the sensor had malfunctioned, so they replaced it. Rather than just simply send me a new kit, they returned my old strap. Ok, fine… A month or two later, the same thing happened again. I give up. I won’t buy another Polar product again. Despite its lack of Bluetooth connectivity to my gym’s equipment, I’m going back to Garmin. Garmin is more accurate, reliable, and has an actual customer service department.

## Frequently Bought Together

- Polar H9 Heart Rate Sensor
- Duracell CR2025 3V Lithium Battery, Child Safety Features, 4 Count Pack, Lithium Coin Battery for Key Fob, Car Remote, Glucose Monitor, CR Lithium 3 Volt Cell

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-21*