--- product_id: 1259687 title: "Polar T31 Coded Chest Transmitter and Elastic Strap" brand: "polar" price: "1174 kr" currency: NOK in_stock: true category: "Polar" url: https://www.desertcart.no/products/1259687-polar-t31-coded-chest-transmitter-and-elastic-strap store_origin: NO region: Norway --- # 2500 hours battery life Water-resistant & sweat-proof 5kHz coded transmission Polar T31 Coded Chest Transmitter and Elastic Strap **Brand:** polar **Price:** 1174 kr **Availability:** ✅ In Stock ## Summary > 💓 Stay ahead of the pack with pinpoint heart rate precision! ## Quick Answers - **What is this?** Polar T31 Coded Chest Transmitter and Elastic Strap by polar - **How much does it cost?** 1174 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/1259687-polar-t31-coded-chest-transmitter-and-elastic-strap) ## 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 - • **Built to Last & Perform:** Water-resistant and durable for intense workouts, rain or shine. - • **Endurance-Ready Battery:** Up to 2500 hours of uninterrupted training without battery swaps. - • **Sleek & Comfortable Fit:** Slim, lightweight design with elastic strap fits 25-54 inch chests seamlessly. - • **Universal Compatibility:** Works flawlessly with a wide range of Polar monitors and gym equipment. - • **Precision Heart Rate Tracking:** Coded 5kHz transmission eliminates cross-talk for ultra-accurate data. ## Overview The Polar T31 Coded Chest Transmitter and Elastic Strap delivers highly accurate heart rate data via coded 5kHz transmission, preventing interference from nearby devices. Designed for comfort and durability, it fits chest sizes 25-54 inches and offers a robust 2500-hour battery life. Compatible with a broad range of Polar heart rate monitors and gym equipment, this water-resistant transmitter is ideal for professionals and fitness enthusiasts seeking reliable, uninterrupted performance. ## Description desertcart.com Slim, lightweight, and water-resistant, the Polar T31 coded transmitter and belt set accurately transmits your heart rate data to your Polar wrist-top computer. As a result, it's easy to monitor your heart rate during training runs. This version of the T31 coded, meaning it prevents crosstalk from other electronic devices to ensure complete accuracy (Polar also sells a non-coded T31). It's also built to last, with a design that holds up to 2,500 hours of training usage. The transmitter belt--which works with all current Polar wrist-top computers except the CS600 and RS800--includes a sealed transmitter and elastic strap. About Polar The first EKG accurate wireless heart rate monitor was invented by Polar back in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of "intensity training" by heart rate swept the athletic world in the eighties. By the 1990s, individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people trying to lose weight. Polar is the leading brand among consumers, coaches, and personal trainers worldwide and the company is committed to not only producing the best products, but also being the leading educator on the benefits of heart rate based exercise.Getting Started Getting started with your T31 Coded Transmitter is easy. For best results, thoroughly moisten the back electrode areas of the transmitter with water and adjust the strap length to fit snug, but comfortable. Check that the moist electrode areas are firmly against your skin and that the Polar logo is in the upright position. Tip: When you are finished with your workout, remove the transmitter, rinse with water and dry with a soft towel. Never store the transmitter wet, in a damp environment or in any kind of non-breathable material, such as a plastic bag or sports bag. Sweat and moisture may keep the electrodes wet and the heart rate sensor activated. This will shorten the battery life. Keep in a cool and dry place. Tip: When you are finished with your workout, remove the transmitter, rinse with water and dry with a soft towel. Never store the transmitter wet, in a damp environment or in any kind of non-breathable material, such as a plastic bag or sports bag. Sweat and moisture may keep the electrodes wet and the heart rate sensor activated. This will shorten the battery life. Keep in a cool and dry place. Product Description Slim, light and fully water resistant transmitter that prevents cross-talk from other electrical devices for accurate measurement. ## 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 | | Best Sellers Rank | #53,933 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #344 in Electronics & Gadgets | | Brand | POLAR | | Brand Name | POLAR | | Color | Black | | Compatible Devices | Polar FT2 | | Customer Reviews | 4.2 out of 5 stars 2,893 Reviews | | 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 | 0.04"L x 0.04"W x 0.04"H | | Item Type Name | Coded Heart Rate Transmitter and Belt Set | | Item Weight | 0.09 kg | | Manufacturer | Polar | | Manufacturer Part Number | 92053125 | | Material | Elasticized-Fabric | | Material Type | Elasticized-Fabric | | Model Number | 92053125 | | Number of Items | 1 | | Number of Packs | 1 | | Product Dimensions | 0.04"L x 0.04"W x 0.04"H | | Screen Size | 54 inches | | Sensor Type | ECG | | Size | 54" | | Software Update Supported to Date | unknown | | Team Name | Polar | | UPC | 725882017594 | | Unit Count | 1 Count | | Warranty Description | 2 year manufacturer | ## Product Details - **Battery Life:** 2500 hours - **Brand:** POLAR - **Color:** Black - **Compatible Devices:** Polar FT2 - **EU Spare Part Availability Duration:** 1 years - **Item Weight:** 0.09 kg - **Material:** Elasticized-Fabric - **Product Dimensions:** 0.04"L x 0.04"W x 0.04"H - **Screen Size:** 54 inches - **Sensor Type:** ECG ## Images ![Polar T31 Coded Chest Transmitter and Elastic Strap - Image 1](https://m.media-amazon.com/images/I/41ZPBd3tfGL.jpg) ![Polar T31 Coded Chest Transmitter and Elastic Strap - Image 2](https://m.media-amazon.com/images/I/51EY7LRKx8L.jpg) ## 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/1259687-polar-t31-coded-chest-transmitter-and-elastic-strap](https://www.desertcart.no/products/1259687-polar-t31-coded-chest-transmitter-and-elastic-strap) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-28*