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Polar T31 Coded Transmitter

by Polar
4.4 out of 5 stars  See all reviews (46 customer reviews)
RRP: 33.39
Price: 26.99 & FREE Delivery in the UK. Details
You Save: 6.40 (19%)
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In stock.
Dispatched from and sold by Amazon. Gift-wrap available.
Want it Saturday, 23 Aug.? Choose Express delivery at checkout. Details
  • Coded transmitter unit
  • Works with current models except CS600 and RS800 but only eliminates interference (cross-talk) when used with a coded wrist or head unit
  • Set includes sealed coded transmitter and elastic strap(M)

Frequently Bought Together

Polar T31 Coded Transmitter + Polar Chest Strap - Spare, S
Buy the selected items together


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Product details

  • Product Dimensions: 0.1 x 0.1 x 0.1 cm ; 9 g
  • Boxed-product Weight: 91 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Batteries 1 Nonstandard Battery batteries required. (included)
  • Item model number: 920135
  • ASIN: B000ARDPPU
  • Date first available at Amazon.co.uk: 19 Aug 2008
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (46 customer reviews)
  • Amazon Bestsellers Rank: 2,255 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Product Description

  • Power Source: Battery
  • Junction: coded


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews
14 of 14 people found the following review helpful
5.0 out of 5 stars easy replacement strap 16 Nov 2009
Verified Purchase
I got this as my T31 strap stopped working with my Polar HRM after about 2 years. I thought I would have to sync or somehow configure the watch to accept the new strap but it started working as soon as I put it on. Neat!

For anyone having problems just remember to wet the hatched areas that go against your skin. I give them a quick lick which does the trick.
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50 of 52 people found the following review helpful
5.0 out of 5 stars All you need for gym-based heart monitoring 3 Aug 2009
This review was amended in January 2013 order to make clear the distinction between the Polar T31 transmitter and the separately available Polar wristband displays.

The T31 is the standard Polar chest band heart rate transmitter. It is also available in a package with Polar wrist band heart rate displays such as the Polar F4, F6, F7 etc.

If you work out in a gym equipped with modern treadmills, cross trainers, steppers, cycle exercisers etc you will find that the machines are all capable of picking up and displaying the heart-rate signals transmitted by the T31. So if you only work out in the gym using modern exercise machines (e.g. Technogym) just buy the T31 at less than half the price of the full transmitter and monitor package. If you later decide to use it for running, cycling or swimming, just add a Polar wrist band monitor.

The T31 is good value for money, in my opinion. Just ensure that the two conductive strips (look like carbon fibre) on the inner face are slightly damp before starting: once you get into the calorie burning zone your perspiration will keep them that way!
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5 of 6 people found the following review helpful
5.0 out of 5 stars Works fine 6 May 2010
Verified Purchase
Pretty boring item to review but worked absolutely fine with all the cardio machines (Life Fitness) at my gym.
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5.0 out of 5 stars Faultless performance 30 Jun 2014
By Tim
Verified Purchase
My old Polar HRM was probably around ten years old and, while it still functioned electronically, the plastic was weak and treating apart to the point of breaking. The replacement works perfectly and should be good for several years to come. I use it with a Polar Vantage NV watch, which itself is over fifteen years old and only needs DIY battery replacement (50p each time) less than once per annum.
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5.0 out of 5 stars Polar T31 Replacement Transmitter 16 Jun 2014
Verified Purchase
Unit built to same standard as the original one delivered with heart rate monitor. Works fine and connects every time.
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5.0 out of 5 stars Mint 9 Jun 2014
By Richy
Verified Purchase
Mint works like a charm, never have to pre program anything again just pop the strap on and away I go on the exercise machines.
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5.0 out of 5 stars Does what it says 19 May 2014
Verified Purchase
Works just like the old one, its comfortable and easy to clean. I use it with a very old X Trainer watch
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5.0 out of 5 stars Replacement chest strap. 13 May 2014
Verified Purchase
This is a replacement for a Polar HR monitor and chest strap. It appears more comfortable than the one it replaced but as the batteries cannot be changed I suspect it is the only option.
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Most Recent Customer Reviews
5.0 out of 5 stars Five Stars
Worked as expected
Published 1 day ago by Del
1.0 out of 5 stars One Star
It works fine but you cannot replace the battery. Mine is now useless.
Published 1 month ago by D ONEILL
5.0 out of 5 stars works great. comfortable to wear
works great. comfortable to wear. bought it mainly to wear when in the pool but more comfortable than the one that came eith the watch so use it all the time now. Read more
Published 1 month ago by O
5.0 out of 5 stars No setting up
So easy to use but expensive as cannot change battery so had to order this as replacement for previous transmitter that was in perfect order except for dead battery but it had... Read more
Published 3 months ago by sauntering
5.0 out of 5 stars Fully functional replacement
After getting intermittent performance on my Polar fitness watch I considered replacing it but the latest version looks cheap and nasty so thought I would try a new belt first. Read more
Published 4 months ago by D. J. Jackson
4.0 out of 5 stars replacement chest strap
I have used this monitor for a few years, this is a replacement. As a piece of kit I have always been impressed , it is accurate and talks to the gym equipment I use. Read more
Published 4 months ago by pepsimax
5.0 out of 5 stars I love this HRM, its so easy to use and it is easy to clean and store...
I would recommend this product to anyone - so easy to get going no fuss and the attachment strap is top banana :-)
Published 5 months ago by Happy Days
5.0 out of 5 stars Works but was sent T31 instead of T31c
I received the polar T31 transmitter instead of the polar T31c transmitter so be careful with what you get, cause it might be the wrong one!
Published 6 months ago by becccci
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