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Garmin Scales and Monitors: Index S2, Index BPM, HRM 600 and HRM-Fit
Your Garmin watch tracks what happens on your wrist. These four devices fill in the rest. The Index S2 smart scale sends weight and body composition to Garmin Connect over Wi-Fi for up to 16 people. The Index BPM is Garmin's FDA-cleared upper-arm blood pressure monitor, with readings that land in the same app. The HRM 600 is the premium chest strap that adds running dynamics, Running Economy and Step Speed Loss to compatible watches and can record activities on its own. The HRM-Fit clips to a sports bra instead of strapping around the chest and brings running dynamics to women who want precision without a strap.
At DiveCatalog.com we carry all four as an authorized Garmin dealer. Specifications below come from Garmin's official product pages, newsroom releases and owner's manuals.
At a Glance
| Device | Measures | Connectivity | Battery | Users |
|---|---|---|---|---|
| Index S2 smart scale | Weight, 30-day trend, BMI, body fat, skeletal muscle mass, bone mass, body water | Wi-Fi sync to Garmin Connect, Bluetooth and ANT capable | 4 AAA, up to 9 months | Up to 16 profiles |
| Index BPM blood pressure monitor | Systolic and diastolic pressure plus pulse, single or three-reading average | Wi-Fi and Bluetooth LE 5.0; works stand-alone | 4 AAA, up to 9 months | Up to 16 profiles |
| HRM 600 chest strap | Heart rate and HRV plus running dynamics, pace and distance, step speed loss, all-day activity | ANT+ and Bluetooth LE (3 connections), encrypted pairing with Garmin devices | Rechargeable, up to 2 months at 1 hr a day | XS-S and M-XL straps |
| HRM-Fit sports bra monitor | Heart rate plus running dynamics, treadmill pace and distance, all-day activity | ANT+ and Bluetooth LE (3 connections) | CR2032, up to 12 months at 1 hr a day | One size, clips to a sports bra |
The Lineup in Detail
Index S2 Smart Scale
Step on and the Index S2 shows weight, a 30-day weight trend graph, BMI, body fat percentage, skeletal muscle mass, bone mass and body water percentage on a color display, then syncs everything to Garmin Connect over Wi-Fi, where it sits next to your sleep, training and heart rate data. Up to 16 people can each sync to their own account, a weight-only mode hides body composition for anyone who prefers it, and customizable widgets can even show the weather. Four AAA batteries last up to 9 months, and the platform is rated to 400 lb. Garmin's note: not for people with pacemakers or other internal electronic devices.
Index BPM Smart Blood Pressure Monitor
Garmin's first blood pressure monitor is an FDA-cleared, clinically validated upper-arm cuff that measures systolic and diastolic pressure and pulse in a single reading or an averaged set of three, with a built-in OLED display so it works without a phone. Readings sync to Garmin Connect over Wi-Fi, where you can add notes, set reminders, view 7-day, 4-week and 1-year trends and export PDF reports for your doctor. The adjustable cuff fits arms from 22 to 42 cm (9 to 17 inches) and folds for travel, the device stores more than 100 readings between syncs, supports up to 16 user profiles and runs up to 9 months on four AAA batteries. Garmin's disclaimer: it is not intended to diagnose, treat, cure or prevent any disease, and it is not for users under 18.
HRM 600 Heart Rate Monitor (May 2025)
Garmin's premium chest strap does three things a watch cannot. First, electrode heart rate and HRV with the accuracy of a strap, stored and forwarded for swimming. Second, torso motion sensors that deliver running dynamics without a pod: cadence, stride length, vertical oscillation, vertical ratio, ground contact time and balance, and the new Step Speed Loss metric, which with Running Economy is available on the Forerunner 970, fenix 8, Venu X1 and Enduro 3. Third, watch-free recording: start an activity from the Garmin Connect app and the strap records heart rate, calories, speed and distance for up to 24 hours across profiles from running and cycling to basketball, soccer, hockey, lacrosse, rugby, boxing and MMA. It also tracks all-day steps, calories, intensity minutes and heart rate. The rechargeable module runs up to 2 months at an hour a day, charges fully in 3 hours and gains about 2 hours of use from a 10 minute top-up; the strap is machine washable, rated 5 ATM, and comes in XS-S (chest 60 to 85 cm) or M-XL (chest 80 to 119 cm). Garmin's caveat: not all compatible watches support every advanced feature.
HRM-Fit Heart Rate Monitor for Women (January 2024)
The HRM-Fit replaces the chest strap with three clips that grip the bottom band of a medium or high support sports bra, with the electrodes resting against the skin under the band. Garmin's words: "Designed with comfort in mind, the HRM-Fit is a purpose-built training tool specifically created for our female customers." It delivers running dynamics (cadence, vertical oscillation, ground contact time and balance, stride length, vertical ratio), treadmill and indoor pace and distance, stores heart rate for a watch-started activity and forwards it afterward, and tracks all-day activity through the Garmin Connect app. A user-replaceable CR2032 lasts up to 12 months at an hour a day, the 53 gram module is rated 3 ATM and hand-wash only, and it pairs over ANT+ and Bluetooth with Garmin watches, Edge computers, fitness equipment and the Tacx Training app. Garmin's bra guidance: a flat band roughly 19 to 50 mm wide with firm compression, and keep the clips off underwire.
HRM 600 or HRM-Fit?
Choose the HRM 600 if you want the full running dynamics set including Step Speed Loss and Running Economy, watch-free activity recording, a rechargeable battery and 5 ATM swim use. Choose the HRM-Fit if you train in a sports bra and want strap-free comfort with core running dynamics, a year of coin-cell battery and the lighter price. Both pair with Garmin watches, Edge bike computers and third-party apps over ANT+ and Bluetooth.
Why Buy Garmin Health Devices from DiveCatalog.com?
- Authorized Garmin dealer: genuine products with the full Garmin warranty
- Complete the ecosystem: pair a scale, blood pressure monitor or strap with any Garmin smartwatch in one order
- Fast shipping from our California warehouse and easy returns and exchanges
- Rewards program: earn points on every purchase
Frequently Asked Questions: Garmin Scales and Monitors
Does the Index S2 need a Garmin watch?
No. It needs the Garmin Connect app on a phone and a 2.4 GHz Wi-Fi network. Data appears in the app whether or not you own a Garmin watch.
Is the Index BPM FDA cleared?
Yes. Garmin describes it as an FDA-cleared, clinically validated medical device, accurate to plus or minus 3 mmHg or 2 percent. It is not intended to diagnose or treat any condition and is not for users under 18.
Which watches get Running Economy and Step Speed Loss from the HRM 600?
The Forerunner 970 at launch, with the fenix 8, Venu X1 and Enduro 3 added in Garmin's August 2025 update. Garmin lists the Forerunner 570 as excluded.
Can the HRM 600 record a workout without a watch?
Yes. Start the activity from the Garmin Connect app and the strap records heart rate, calories, speed and distance for up to 24 hours, then syncs when you are done.
Will the HRM-Fit work with any sports bra?
It is designed for medium and high support sports bras with a flat bottom band about 19 to 50 mm wide. Garmin advises against bras with a front zipper or embellishments and against closing the clips on underwire.
Browse Garmin scales and monitors above. Not sure which heart rate monitor fits your training? Tell us your watch model and what metrics you want and we will point you to the right one.