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Polar H9 Heart Rate Sensor

Description:

  • 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.

  • 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.

    Reviews:

    5.0 out of 5 stars Perfect app; strap needs DIY modifications; works great with my old polar watch

    B. · May 30, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } 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.

    5.0 out of 5 stars Works great.

    P. · July 6, 2025

    Pairs with my PRECOR treadmill. But treadmill display is not as accurate as my iPhone. So I just use my iPhone while working out. I like the app.

    1.0 out of 5 stars No one should buy Polar items.

    C. · July 17, 2025

    This is pure e-waste. Don't bother with it whatever your usecase. it never stays connected to the app, it always drops. it doesnt help me monitor my heartrate because i have to do specialized programs in the app to see anything. truly I don't understand why a factory would make these then let customers use them with the utter travesty of an app that is Polar Flow. 0/10 stars, I'm very frustrated!

    5.0 out of 5 stars Easy to use an efficient.

    J. · June 24, 2025

    I love the Polar H9 heart rate monitor. It's easy to use and works flawlessly. This is my second purchase and the first one lasted about 5 years.

    4.0 out of 5 stars Terrific in All But One Respect

    R. · August 22, 2022

    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.

    5.0 out of 5 stars Better than Garmin HRM Dual

    b. · 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.

    Au top

    v. · May 23, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Très efficace

    Mükemmel

    B. · November 9, 2024

    Nabız ve kalori takibi yapan sporcular için kesinlikle alınması gereken bi ürün. Iphone da polar uygulamask ile herşeyi takip edebiliyorsunuz.

    BUENA BANDA PULSÓMETRA

    e. · March 15, 2024

    Compré el Polar H9 durante el Black Friday con una excelente oferta, y debo decir que estoy muy satisfecho con mi compra. Este sensor de frecuencia cardíaca cumple su función de manera eficiente y confiable. No he tenido ningún problema al sincronizarlo con mi reloj Polar M430 ni al usarlo en pruebas exigentes que lleven mi corazón al límite.Durante mis entrenamientos más intensos, el Polar H9 ha demostrado ser preciso y consistente. No ha habido ningún salto o error al monitorizar mis pulsaciones, lo cual es crucial para un seguimiento preciso del rendimiento. Además, es muy cómodo de llevar y no molesta al correr, siempre y cuando lo ajustes correctamente, como cualquier otro pulsómetro.En comparación con las mediciones de frecuencia cardíaca en la muñeca de mi reloj, el Polar H9 ofrece lecturas mucho más precisas. Para aquellos que buscan un seguimiento más avanzado, es posible que necesiten invertir en opciones más tecnológicas y costosas. Pero para mí, el Polar H9 cumple con creces mis expectativas y necesidades.

    Excellent heart rate monitor

    R.M. · October 23, 2024

    Does it’s job. Simple setup and straightforward to use . Have been using for more than a month and has worked flawlessly. Mainly used while cycling and a few times for brisk walks. Heart rate readings are consistent without drop outs

    Excelente banda para monitor de corazon<

    E.S. · October 11, 2024

    He probado varias marcas y la mejor ha sido Polar. Recomendable.

    Polar H9 Heart Rate Sensor

    Product ID: UO08411PMLY
    Condition: New

    4.1

    AED45842

    Price includes VAT & Import Duties
    Size: XS-S
    Availability: In Stock

    Quantity:

    |

    Order today to get by 7-14 business days

    This item qualifies for free delivery

    Returns & Warranty policies

    Imported From: United States

    At BOLO, we work hard to ensure the products you receive are new, genuine, and sourced from reputable suppliers.

    BOLO is not an authorized or official retailer for most brands, nor are we affiliated with manufacturers unless specifically stated on a product page. Instead, we source verified sellers, authorized distributors or directly from the manufacturer.

    Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support. We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, images, descriptions, and reviews originate from the manufacturer or from trusted sellers overseas. BOLO is not affiliated with, endorsed by, or an authorized retailer for most brands listed on our website unless stated otherwise.

    While we strive to display accurate information, variations in packaging, labeling, instructions, or formulation may occasionally occur due to regional differences or supplier updates. For detailed or manufacturer-specific information, please contact the brand directly or reach out to BOLO Support for assistance.

    Unless otherwise stated, all prices displayed on the product page include applicable taxes and import duties.

    BOLO operates in accordance with the laws and regulations of United Arab Emirates. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in United Arab Emirates are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

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    Polar H9 Heart Rate Sensor

    Product ID: UO08411PMLY
    Condition: New

    4.1

    Polar H9 Heart Rate Sensor-0
    Size: XS-S

    AED45842

    Price includes VAT & Import Duties
    Availability: In Stock

    Quantity:

    |

    Order today to get by 7-14 business days

    This item qualifies for free delivery

    Returns & Warranty policies

    Imported From: United States

    At BOLO, we work hard to ensure the products you receive are new, genuine, and sourced from reputable suppliers.

    BOLO is not an authorized or official retailer for most brands, nor are we affiliated with manufacturers unless specifically stated on a product page. Instead, we source verified sellers, authorized distributors or directly from the manufacturer.

    Each product undergoes thorough inspection and verification at our consolidation and fulfilment centers to ensure it meets our strict authenticity and quality standards before being shipped and delivered to you.

    If you ever have concerns regarding the authenticity of a product purchased from us, please contact Bolo Support. We will review your inquiry promptly and, if necessary, provide documentation verifying authenticity or offer a suitable resolution.

    Your trust is our top priority, and we are committed to maintaining transparency and integrity in every transaction.

    All product information, images, descriptions, and reviews originate from the manufacturer or from trusted sellers overseas. BOLO is not affiliated with, endorsed by, or an authorized retailer for most brands listed on our website unless stated otherwise.

    While we strive to display accurate information, variations in packaging, labeling, instructions, or formulation may occasionally occur due to regional differences or supplier updates. For detailed or manufacturer-specific information, please contact the brand directly or reach out to BOLO Support for assistance.

    Unless otherwise stated, all prices displayed on the product page include applicable taxes and import duties.

    BOLO operates in accordance with the laws and regulations of United Arab Emirates. Any items found to be restricted or prohibited for sale within the UAE will be cancelled prior to shipment. We take proactive measures to ensure that only products permitted for sale in United Arab Emirates are listed on our website.

    All items are shipped by air, and any products classified as “Dangerous Goods (DG)” under IATA regulations will be removed from the order and cancelled.

    All orders are processed manually, and we make every effort to process them promptly once confirmed. Products cancelled due to the above reasons will be permanently removed from listings across the website.

    Description:

  • 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.

  • 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.

    Reviews:

    5.0 out of 5 stars Perfect app; strap needs DIY modifications; works great with my old polar watch

    B. · May 30, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } 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.

    5.0 out of 5 stars Works great.

    P. · July 6, 2025

    Pairs with my PRECOR treadmill. But treadmill display is not as accurate as my iPhone. So I just use my iPhone while working out. I like the app.

    1.0 out of 5 stars No one should buy Polar items.

    C. · July 17, 2025

    This is pure e-waste. Don't bother with it whatever your usecase. it never stays connected to the app, it always drops. it doesnt help me monitor my heartrate because i have to do specialized programs in the app to see anything. truly I don't understand why a factory would make these then let customers use them with the utter travesty of an app that is Polar Flow. 0/10 stars, I'm very frustrated!

    5.0 out of 5 stars Easy to use an efficient.

    J. · June 24, 2025

    I love the Polar H9 heart rate monitor. It's easy to use and works flawlessly. This is my second purchase and the first one lasted about 5 years.

    4.0 out of 5 stars Terrific in All But One Respect

    R. · August 22, 2022

    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.

    5.0 out of 5 stars Better than Garmin HRM Dual

    b. · 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.

    Au top

    v. · May 23, 2025

    (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Très efficace

    Mükemmel

    B. · November 9, 2024

    Nabız ve kalori takibi yapan sporcular için kesinlikle alınması gereken bi ürün. Iphone da polar uygulamask ile herşeyi takip edebiliyorsunuz.

    BUENA BANDA PULSÓMETRA

    e. · March 15, 2024

    Compré el Polar H9 durante el Black Friday con una excelente oferta, y debo decir que estoy muy satisfecho con mi compra. Este sensor de frecuencia cardíaca cumple su función de manera eficiente y confiable. No he tenido ningún problema al sincronizarlo con mi reloj Polar M430 ni al usarlo en pruebas exigentes que lleven mi corazón al límite.Durante mis entrenamientos más intensos, el Polar H9 ha demostrado ser preciso y consistente. No ha habido ningún salto o error al monitorizar mis pulsaciones, lo cual es crucial para un seguimiento preciso del rendimiento. Además, es muy cómodo de llevar y no molesta al correr, siempre y cuando lo ajustes correctamente, como cualquier otro pulsómetro.En comparación con las mediciones de frecuencia cardíaca en la muñeca de mi reloj, el Polar H9 ofrece lecturas mucho más precisas. Para aquellos que buscan un seguimiento más avanzado, es posible que necesiten invertir en opciones más tecnológicas y costosas. Pero para mí, el Polar H9 cumple con creces mis expectativas y necesidades.

    Excellent heart rate monitor

    R.M. · October 23, 2024

    Does it’s job. Simple setup and straightforward to use . Have been using for more than a month and has worked flawlessly. Mainly used while cycling and a few times for brisk walks. Heart rate readings are consistent without drop outs

    Excelente banda para monitor de corazon<

    E.S. · October 11, 2024

    He probado varias marcas y la mejor ha sido Polar. Recomendable.

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