--- product_id: 259618119 title: "Polar T31 Transmitter" brand: "polar" price: "1181 kr" currency: NOK in_stock: true category: "Polar" url: https://www.desertcart.no/products/259618119-polar-t31-transmitter store_origin: NO region: Norway --- # 2500 hrs battery life Waterproof & weatherproof 5kHz ECG transmission Polar T31 Transmitter **Brand:** polar **Price:** 1181 kr **Availability:** ✅ In Stock ## Summary > 📊 Stay ahead of the pack with precision heart rate tracking! ## Quick Answers - **What is this?** Polar T31 Transmitter by polar - **How much does it cost?** 1181 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/259618119-polar-t31-transmitter) ## 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 - • **All-Weather Durability:** Waterproof construction means no interruptions, rain or shine. - • **Exclusive Signal Coding:** Individually coded to eliminate cross-talk and ensure your data stays yours. - • **Long-Lasting Battery Life:** Up to 2500 hours of use keeps you training without frequent replacements. - • **Ultra-Light & Slim Design:** Comfortably fits chest sizes 25-54 inches without weighing you down. - • **Precision ECG Heart Rate Transmission:** Seamlessly syncs with multiple Polar monitors for accurate real-time data. ## Overview The Polar T31 Transmitter is a slim, lightweight, and waterproof ECG heart rate transmitter that uses 5kHz coded transmission to deliver accurate heart rate data to a wide range of Polar monitors. Designed to prevent signal interference with exclusive coding, it fits chest sizes from 25 to 54 inches and offers an impressive 2500-hour battery life, making it a reliable companion for serious fitness enthusiasts. ## Description Product Description At the heart of your training is the Polar T31 Coded Transmitter. Its purpose is simple: to transmit your heart rate to your wrist unit. Slim and light, the ECG (electrocardiogram) accurate transmitter is fully water resistant and designed for all weather conditions. Compatible heart rate monitors include, but are not limited to: FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5. Set Contains: T31 coded transmitter, fabric elastic strap ## Features - Transmits heart rate data to Polar heart rate monitors using 5kHz transmission and compatible gym equipment. Compatible heart rate monitors include, but are not limited to: FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5 - Compatible products:Elastic straps.Individually coded to pick up your heart rate monitor and not others nearby. This eliminates cross-talk with other electronic devices in the same area. - Slim, lightweight, and waterproof design - Fits 25 to 54 inch chest size - Average battery lifetime is 2500 hours of use. Non user replaceable battery ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000ARDPPU | | Battery Average Life | 2500 Hours | | Battery Description | Non user replaceable battery | | Best Sellers Rank | #130,368 in Sporting Goods ( See Top 100 in Sporting Goods ) #170 in Sports Heart Rate Monitors | | Brand Name | Polar | | Color | Black | | Compatible Devices | Polar heart rate monitors (FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5) | | Customer Reviews | 4.3 4.3 out of 5 stars (2,830) | | Display Size | 54 Inches | | EU Spare Part Availability Duration | 1 Years | | Global Trade Identification Number | 00725882017594, 00725882201351 | | Included Components | Heart Rate Transmitter | | Item Dimensions L x W x H | 1L x 1W x 1H millimeters | | Item Type Name | Coded Heart Rate Transmitter and Belt Set | | Item Weight | 0.09 Kilograms | | Manufacturer | Polar | | Manufacturer Part Number | 92053125 | | Material Type | Elasticized-Fabric | | Model Number | 92053125 | | Number of Items | 1 | | Number of Packs | 1 | | Sensor Type | ECG | | Size | standart | | Software Update Supported to Date | unknown | | Team Name | Polar | | UPC | 725882017594 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Polar - **Colour:** Black - **Compatible devices:** Polar heart rate monitors (FT1, FT2, FT4, FT7, FT40, FT60, FT80, RS100, RS300X, RS400, RCX5) - **Material:** Elasticized-Fabric - **Screen size:** 54 Inches ## Images ![Polar T31 Transmitter - Image 1](https://m.media-amazon.com/images/I/41ZPBd3tfGL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How do you change the battery?** A: Although the unit is designed NOT to have the battery replaced, it can be done. It takes a CR2032 coin type battery.I followed this video and successfully replaced mine in under ten minutes.https://youtu.be/lBsv9XoV6aA **Q: Is it compatible with a life fitness treadmill? If so how can it be connected?** A: Yes it is compatible, actually I purchased for same treadmill brand . It is conected automatically by gymlink so no setup is required. Great product . **Q: how do you pair this t31 with compatible treadmill machines with polar sign on it?** A: Pairing is automatic. Just start your workout and it will sync with a little sweat **Q: Does the t31 work with the iphone 5? I've tried without success using both MapMyRide and the Polar App. Cheers M** A: The problem is that you need the device to be capable of acquiring data from the transmiter in it's own frequency and I do not think that the iphone is able to do that without a special additional device. For example you have a app called sports tracker that has its own heart rate monitor, I do not know how it works gut there must be some way to catch the information from the heart rate monitor to the phone. For what I know is very probable that you should need some additional device to get the heart rate monitor frequency. ## Frequently Bought Together - Polar T31 Coded Chest Transmitter and Elastic Strap - Polar H9 Heart Rate Sensor - hengkang Fit for Polar FT4/FT7 Watch Bands, Stylish Adjustable Silicone Replacement Band Straps Wristbands Accessory Band Bracelet --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.no/products/259618119-polar-t31-transmitter](https://www.desertcart.no/products/259618119-polar-t31-transmitter) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-17*