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Garmin HRM-Swim Heart Rate Monitor + Strap - 010-12342-00

Garmin HRM-Swim Heart Rate Monitor + Strap - 010-12342-00

HRM-Swim: like a fish in water

With its extra durable and non-slip design, the HRM-Swim is suitable for heart rate measurement while swimming. It easily handles salt water, chlorine and many other chemicals. The HRM-Swim fits compactly on the body, creates low water resistance and, thanks to the slightly wider strap, does not slip even during fast roll turns, push-offs and swimming without a wetsuit.

During a swim session, the chest strap records and temporarily stores heart rate for up to 20 hours before transmitting it out of the water via ANT+ to a compatible Garmin device¹. During out-of-water recovery periods, the HRM-Swim also sends real-time heart rate to a compatible Garmin watch. With three hours of use a week, the HRM-Swim's battery needs to be replaced after 18 months, which can be done quickly and easily by yourself.

Garmin heart rate measurement while swimming

  • Specially designed for swimmers
  • Non-slip strap
  • Comfortable and easily adjustable strap
  • Stores heart rate data and then sends it to compatible devices¹

Examples of typical use

HRM-Tri HRM-Swim
Cycling training, running training, bike training Swimming pool swimming
Open water swimming Open water swimming
Triathlon competition (with open water swimming) while wearing triathlon clothing Triathlon competition (open water swim), no triathlon clothing required
Running or cycling training as part of a multisport activity with pool swimming

Garmin HRM-Swim technical data

Dimensions and weight

  • Device dimensions (L x W x D): 58 to 145 x 3.8 x 1.2 cm
  • Weight: 72 g
  • Module size: 29.4 x 51.4 x 8.5 mm
  • Module weight: 51 g
  • Length change: Foldable
  • Length: 58 to 145 cm
  • Battery: CR2032
  • Battery life: 18 months (swimming: 3 hours per week)
  • Water resistance: 5 ATM (corresponds to the test pressure in 50 m water depth)


  • ANT+® heart rate: Yes
  • Supports heart rate variability and advanced heart rate features: Yes
  • 2.4 GHz ANT wireless transmission protocol: Yes
  • Running efficiency: No
  • Stores and transmits heart rate data: Yes
  • Heart rate statistics for swimming intervals: Yes
  • Non-slip design for pool swimming: Yes
  • Resistant to pool chemicals: Yes

Compatible devices:

  • fēnix® 3 Sapphire
  • fēnix® 3 Sapphire HR
  • D2™ Charlie
  • Descent™ Mk1
  • epix™
  • fēnix® 3
  • fēnix® 5
  • fēnix® 5S
  • fēnix® 5X
  • fēnix® Chronos
  • Forerunner® 735XT
  • Forerunner® 935
  • Forerunner® 920XT
  • quatix® 5
  • quatix® 5 Sapphire
  • quatix® 3
  • tactix® Bravo
  • tactix® Charlie
  • VIRB® 360

Dimensions in mm (L/W/H): L x W x D: 58 to 145 x 3.8 x 1.2 cm

Scope of delivery:

  • HRM-Swim
  • Manual

Fact Sheet of Garmin HRM-Swim Heart Rate Monitor + Strap - 010-12342-00

Product Name: Garmin HRM-Swim Heart Rate Monitor + Strap - 010-12342-00
Manufacturer: Garmin
Item Code: GAR240594
activity: Swim, Swimrun
transmission standard: ANT+
device sensors: Heart Rate Sensors (+ Chest Strap)
Model year: 2023
Collection: Full year
Color: Blue
weight: 140g
manufacturer item code: 010-12342-00
Manufacturer page: