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Polar H9 Heart Rate Sensor

4.1 4.1 out of 5 stars 8,398 ratings
Price: $64.95 $95.09 Free Return on some sizes and colors
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Size: Select Size
Brand POLAR
Material Polyester
Color Black
Compatible Devices Smartphones, Tablets, Laptops, Desktops
Screen Size 0.96 Inches
Product Dimensions 1.34"L x 2.56"W x 0.39"H
Item Weight 60 Grams
Battery Life 400 Hours
Sensor Type Wearable
Battery Description Lithium-Ion

About this item

  • 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.
› See more product details

Top Brand: POLAR

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From the brand

Previous page

  2. It all began in 1977.

    This is the year we launched an entire industry.

    We had the foresight to see the incredible potential in wearable devices, and we’ve led the charge ever since – developing the most advanced, trusted, and innovative technology that can be worn by anyone who wants to understand their bodies better.

  3. Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women
    Polar Verity Sense - Optical Heart Rate Monitor Armband for Any Sport and Exercise
    Polar H9 Heart Rate Sensor
    Polar OH1+ Optical Heart Rate Monitor – Waterproof HR Sensor with Swimming Goggle Strap & Armband...

    Shop Polar Heart Rate Sensors

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From the manufacturer

h9 chest strap; heart rate monitor; polar h9; heart rate chest strap; hrm chest strap; hrm strap

Please note there is a protective film over the HR sensor, please remove prior to use.

polar h9; h9 chest strap; heart rate monitor; hr chest strap; fitbit; garmin; garmin heart rate;
Use the FREE Polar Flow app and many other!

For a full Polar H9 experience, connect your heart rate monitor to Polar Flow, our free app or any other compatible app. Just choose the one that best fits your needs and turn your phone into a heart rate tracker easily.

Polar H9 (Bluetooth & ANT+)

Heart Rate Sensor

Polar H9 is a high quality heart rate sensor for your daily use. Bluetooth & ANT+ technologies ensure connections to top apps, smart watches, equipment and other devices.

  • Third party app compatibility
  • Reliable heart rate measurement
  • Bluetooth Low Energy, ANT+ and 5 kHz connections
  • Several connections can be active simultaneously
  • Battery life 400 hours
  • Waterproof up to 30m
  • Machine-washable textile strap

Key Features

h9 chest strap; heart rate monitor; polar h9; heart rate chest strap; heart rate; hr chest strap

Reliable and real-time heart rate monitoring

Polar H9 is an ideal jack-of-all-trades sensor for all your everyday activity.

h9 chest strap; heart rate monitor; polar h9; heart rate chest strap; heart rate; hr chest strap

Connectivity: Third-party apps

Bluetooth and ANT+ technologies open up endless connection possibilities to your favorite app on both iOS and Android phones, and smart watches. All you need to do is get connected & get going.

h9 chest strap; heart rate monitor; polar h9; heart rate chest strap; heart rate; hr chest strap

Polar Soft Strap

Polar H9 comes with the Polar Soft Strap and tracks your heart rate reliably. Polar Soft Strap machine-washable.

Polar H9
Polar H10
Polar Verity Sense
Customer Reviews
4.1 out of 5 stars 8,398
4.1 out of 5 stars 17,237
4.1 out of 5 stars 3,340
Price $64.95 $98.93 $99.95
HR measurement method ECG ECG Optical Heart Rate (6-LED)
Product placement Chest Chest Arm and temple
Operation time 400h (replaceable battery) 400h (replaceable battery) 30h
Rechargeable ✓
Compatible with 3rd party apps ✓ ✓ ✓
Built-in memory 1 training session Up to 600h HR training
ANT+ and Bluetooth Low Energy connectivity ✓ ✓ ✓
Dual Bluetooth channels ✓ ✓ ✓
5 kHz transmission (Gymlink) ✓ ✓ ✓
Waterproof 30 m 30 m 50 m

Product 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 inches

M-XXL:

26 inches - 36 inches

Please note, there is a protective film over the HR sensor, please remove prior to use.

Product information

Technical Details

Additional Information

Product guides and documents

User Guide (PDF)
User Manual (PDF)

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Customer reviews

4.1 out of 5 stars
8,398 global ratings

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Customers say

Customers are satisfied with the product's quality and comfort. However, some have reported issues with reliability, including dropping connections, poor quality control, and sensor malfunctions. There are mixed opinions on functionality, connectivity issues, accuracy, ease of use, and app use.

AI-generated from the text of customer reviews

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QualityComfortFunctionalityConnection issuesAccuracyEase of useApp useReliability
63 customers mention "Quality"63 positive0 negative

Customers like the quality of the product. They say it's a good basic monitor without bells and whistles. The sensor is accurate, and the purchase has been worthwhile. The app is well-designed for guiding workouts and tracking fitness.

"It works. Seems accurate. Plays nice with iPhone, Strava, and Zwift. Chest band is comfortable. We’ll have to see how it holds up over time." Read more

"Classic chest strap heart monitor. As I understand it, these work on electrical signals from the heart like and EKG...." Read more

"wanted a good basic monitor without a phone and texts and bells and whistles..." Read more

"...What more could I ask for? Quality product, highly recommended!" Read more

62 customers mention "Comfort"46 positive16 negative

Customers like the comfort of the biometric monitor. They say the strap is soft and comfortable, with a softer elastic fabric and a case that sits more flush with the heart rate strap included.

"...Otherwise, the band is comfortable; and the transmitter functions great...." Read more

"...a little narrower but for me its more comfortable because of softer elastic fabric...." Read more

"...Seems accurate. Plays nice with iPhone, Strava, and Zwift. Chest band is comfortable. We’ll have to see how it holds up over time." Read more

"...I like it but there are a few quirks. 1 - It feels a tad odd when it's on you...." Read more

256 customers mention "Functionality"161 positive95 negative

Customers have different views on the product's functionality. Some find it reliable and accurate, working within their target zone. Others mention issues with reliability, lack of usefulness, and basic functionality.

"...to monitor my heart rate on runs and bike rides, and it has worked flawlesly throughout...." Read more

"...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..." Read more

"This heart rate monitor has worked great!..." Read more

"Now I see in reviews it's not reliable. Its not. Worked okay through 1st battery change and then started earing batteries and then just stopped..." Read more

176 customers mention "Connection issues"79 positive97 negative

Customers have different experiences with the connection. Some say it pairs automatically on their phones and connects to their treadmills and ellipticals. Others report issues like dropping connections, not being able to reconnect it, and finding the Ant+ connection not strong enough for a reliable connection.

"...on it once during this time when I noticed that it would not connect to my bike computer...." Read more

"...Easy to attach around my chest and it synchs with the gyms elliptical and treadmill machines right as I get on them...." Read more

"...the metal buttons on strap was separating, would drop connections frequently towards end of life, and the ultimate failure points around screws on..." Read more

"...this chest monitor also paired with every piece of cardio equipment in the gym automatically..." Read more

154 customers mention "Accuracy"103 positive51 negative

Customers have mixed opinions about the product's accuracy. Some find it accurate enough for them, providing precise and consistent readings. Others report issues with inaccurate heart rate readings after a few months of use.

"...This H9 model paired with Venu 2 very readily, and it's communicating my heart rate to it as reliably as one would expect...." Read more

"...App easy to use and feel it’s very accurate when used side by side with machines tracking...." Read more

"...The cheap watches here on Amazon do not track your heart rate accurately, especially at higher rates. This thing is great." Read more

"...The important art is the monitor is accurate. i have tested its readings against the equipment of my oximeter...." Read more

80 customers mention "Ease of use"51 positive29 negative

Customers have different views on the biometric monitor's ease of use. Some find it easy to set up and use, with a good battery life. The app is simple to understand and helpful for tracking various activities. Others mention that the instructions are not clear, the device is irritating to put on, and there are no instructional videos available.

"...Once you pair it to your watch or bike computer, it's remarkably simple to use - just put it on and it automatically turns on and starts..." Read more

"...a chest strap would be more accurate hb measure but this is not user friendly" Read more

"...This H9 model paired with Venu 2 very readily, and it's communicating my heart rate to it as reliably as one would expect...." Read more

"...App easy to use and feel it’s very accurate when used side by side with machines tracking...." Read more

50 customers mention "App use"34 positive16 negative

Customers have mixed opinions about the app. Some find it great, with multiple options to choose the type of exercise and built-in workouts to choose from to measure calorie intake more accurately. Others report issues with the app not being compatible with their favorite apps.

"...beat app is free easy download and easy to use with a long list of various fitness activities. i would like to see a cardo circuit added...." Read more

"...Super fascinating. All in all, this is a must have for fitness enthusiasts." Read more

"...I’ve had mine for over three years and just starting to have issue with it syncing to app...." Read more

"...This thing connects to my phone flawlessly. The app is great. It records my workout. I only wish it had adjustable alarms...." Read more

101 customers mention "Reliability"26 positive75 negative

Customers are unhappy with the product's reliability. They report issues like constant dropouts, poor quality batteries, and a defective monitor. Some customers also mention that the strap is of low quality.

"Now I see in reviews it's not reliable. Its not...." Read more

"...Perhaps the original battery was of low quality. I would have expected longer battery life...." Read more

"...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...." Read more

"Lasted a few months past 2 years then became erratic. Replaced strap. Still erratic. Not abused. Used 3 to 5 times per week...." Read more

Pairs easily with Zwift
5 out of 5 stars
Pairs easily with Zwift
Paired easily with my iPhone. It was a little bit of a challenge to pair the Polar Flow app with my Polar H9 heart rate monitor. I resolved this by restarting my phone then this device paired immediately. No issues pairing with Zwift which is great because heart rate monitors are required to do, Zwift racing.
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Top reviews from the United States

  • HristovV
    5.0 out of 5 stars Excellent, simple, and reliable heart rate strap.
    Reviewed in the United States on October 9, 2024
    Size: M-XXLVerified Purchase
    I have been using this strap for over a year to monitor my heart rate on runs and bike rides, and it has worked flawlesly throughout. I've only changed the battery on it once during this time when I noticed that it would not connect to my bike computer. I personally have never had the band slip or shift off my chest.

    Once you pair it to your watch or bike computer, it's remarkably simple to use - just put it on and it automatically turns on and starts transmitting to whatever device you have. When you take it off, it automatically powers down. There is no on/off indicator light, but I found that it's not needed, and would likely just waste battery.
    5 people found this helpful
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  • Alan T. Straka
    5.0 out of 5 stars No fuss affordable heart rate monitor
    Reviewed in the United States on March 9, 2025
    Size: M-XXLVerified Purchase
    This heart rate monitor has worked great! Easy to attach around my chest and it synchs with the gyms elliptical and treadmill machines right as I get on them. I like that the electronic piece snaps on and off, so I can clean the band after every use while keeping the transmitter piece dry.
    One person found this helpful
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  • DaveC
    1.0 out of 5 stars Stops working
    Reviewed in the United States on January 31, 2025
    Size: M-XXLVerified Purchase
    Now I see in reviews it's not reliable. Its not. Worked okay through 1st battery change and then started earing batteries and then just stopped working at all! 6 months fromnunboxing to garbage. I'm a serious cyclist ex amateur racer, still average 10 hours or so a week. I'm also an electrical engineer .. something seems to be wrong with these? Incredible sensitivity to static electricity? Anyway, skip the H9!
    3 people found this helpful
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  • TWilhite
    5.0 out of 5 stars Accurate heart rate monitor
    Reviewed in the United States on December 23, 2023
    Size: M-XXLVerified Purchase
    I'm darn near 60 and recently was diagnosed with A-fib. Nothing super serious but none the less... I had been wondering if I could trust the heart rate monitor on my fruit watch (optical) and decided I needed to try something different. I should say, the Polar H9 nor the fruit watch are able to accurately detect A-fib. I read reviews an read reviews and decided the Polar H9 would be what I need. If I didn't care for it, I could give it to someone and not be out a gob of money.

    Well, I'm keeping it. I like it but there are a few quirks. 1 - It feels a tad odd when it's on you. Wear it snug so it works well and doesn't slip around on you while exercising. I'm sure I'll get used to it in time. Once I get it on and wet the contacts (I'll get to that) I don't notice it. The longest I've run with it on is 4 miles. It did not bother me at all while running. Quirk 2 - you have to wet the area under the strap where the contacts are so it reads accurately. I did try it out without wetting it and it worked fine. I sweat a lot so It got damp fairly quickly. Quirk 3 - Pairing. When you want to pair the device PAIR IT WITH THE APP NOT YOUR DEVICE. I paired it with my phone and then tried to pair it with my watch. Nope. I downloaded Polar Flow and it didn't work. I then recalled something I read in a review about Polar Beat. I unpaired the Polar H9 from the phone and watch and deleted the Polar Flow app and downloaded Polar Beat. I did pair it with my phone through the Polar Beat App. Now, I did not see those instructions with the device. All was good finally. Can you pair with Polar Flow? Darned if I know since I got it to work with Polar Beat. I may try it later and if so, I'll update this. But for now I'm sticking with the Beat.

    The battery life is supposed to be 400 hours on a single coin cell battery. We'll see. If that's true, that should last me a while. I don't think I'm going to get more than 6 - 8 hours of use a week so it'll last about a year. Maybe when it warms up I'll use it more so we'll see.

    Oh, the instructions indicate you should rinse the strap out after each use. Probably very good advice or this thing will get stinky and crusty and not last as long.

    And regarding the accuracy of this monitor vs the fruit watch, they are very similar. That actually surprised me. I'm still learning the Polar Beat App so I can't really speak to what you can and can't do with it yet.

    If things go sideways, I'll edit this review. Cheers and keep moving.
    11 people found this helpful
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  • RobertW
    4.0 out of 5 stars Terrific in All But One Respect
    Reviewed in the United States on August 22, 2022
    Size: M-XXLVerified Purchase
    After using an earlier generation Polar sensor for many years, I decided to buy this one when I bought a Garmin Venu 2 smart watch recently. The earlier Polar model couldn't be paired with the Venu 2.

    This H9 model paired with Venu 2 very readily, and it's communicating my heart rate to it as reliably as one would expect.

    My one and only complaint is with the elastic band's clasping design. It's extremely simple, and it's in that simplicity that I think Polar missed the boat. There's a thin plastic hook that one inserts into a small fabric "eye." Not only is the fabric's opening so small that it can be hard to see, but it has a tendency to come unhooked occasionally. The design could be much improved with an equally simple snap. Otherwise, the band is comfortable; and the transmitter functions great.

    Update after 2 months: After using the H9 6 times a week, it needs a battery (CR2025) after only 2 months . Perhaps the original battery was of low quality. I would have expected longer battery life. Fortunately, it's designed so that the battery is easy to change.
    15 people found this helpful
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  • bennni11
    5.0 out of 5 stars Better than Garmin HRM Dual
    Reviewed in the United States on November 6, 2024
    Size: M-XXLVerified Purchase
    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.
    6 people found this helpful
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Top reviews from other countries

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  • Ernesto Salcedo
    5.0 out of 5 stars Excelente banda para monitor de corazon<
    Reviewed in Mexico on October 11, 2024
    Size: M-XXLVerified Purchase
    He probado varias marcas y la mejor ha sido Polar. Recomendable.
    Report
  • Taylar Wall
    5.0 out of 5 stars Benchmark HR monitor
    Reviewed in Canada on July 20, 2024
    Size: XS-SVerified Purchase
    I've owned garmin and wahoo monitors which often drop signal or simply fail after 1 season. Polar is only consistently reliable HR monitor and lasts for years
    Report
  • Erika coelho
    5.0 out of 5 stars Chegou rápido!
    Reviewed in Brazil on October 1, 2023
    Size: XS-SVerified Purchase
    The media could not be loaded.
    Ótima qualidade! É ótimo custo benefício.
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    Erika coelho
    5.0 out of 5 stars
    Chegou rápido!

    Reviewed in Brazil on October 1, 2023
    Ótima qualidade! É ótimo custo benefício.
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  • frederic pers
    5.0 out of 5 stars Précision et facilité
    Reviewed in France on March 5, 2025
    Size: M-XXLVerified Purchase
    Super produit, compatible avec Garmin Forunner 245.
    Données plus précises qu'avec la montre.
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    frederic pers
    5.0 out of 5 stars
    Précision et facilité

    Reviewed in France on March 5, 2025
    Super produit, compatible avec Garmin Forunner 245.
    Données plus précises qu'avec la montre.
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    Customer image
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  • Burak
    5.0 out of 5 stars Mükemmel
    Reviewed in Turkey on November 9, 2024
    Size: M-XXLVerified Purchase
    Nabız ve kalori takibi yapan sporcular için kesinlikle alınması gereken bi ürün. Iphone da polar uygulamask ile herşeyi takip edebiliyorsunuz.
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