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Polar T31 Uncoded Transmitter

by Polar
| 6 answered questions

Price: £22.49 & FREE Delivery in the UK. Details
In stock.
Dispatched from and sold by Amazon. Gift-wrap available.
4 new from £20.15
  • Non-coded transmitter unit
  • Works with current models except the CS600 and RS800 but does not eliminate interference (cross-talk) from other units
  • Includes sealed transmitter and elastic strap(M)

Frequently Bought Together

Polar T31 Uncoded Transmitter + Polar Chest Strap - Spare, S
Price For Both: £27.44

Buy the selected items together


Special Offers and Product Promotions

  • Between 20-26 October 2014, spend £10 in a single order on item(s) dispatched from and sold by Amazon.co.uk and receive a £2 promotional code to spend in the Amazon Appstore. Here's how (terms and conditions apply)

Product details

  • Product Dimensions: 36.1 x 8.6 x 2 cm ; 141 g
  • Boxed-product Weight: 141 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: 92024880
  • ASIN: B000N4N4UG
  • Date first available at Amazon.co.uk: 28 Mar 2010
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (60 customer reviews)
  • Amazon Bestsellers Rank: 6,534 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Product Description

Polar Chest Strap and Transmitters sold as a set.
  • Functions with both coded and non-coded wrist and head units
  • Works with current models except the CS600 and RS800 but does not eliminate interference (cross-talk) from other units
  • Includes sealed transmitter and elastic strap (M)

Customer Questions & Answers

Customer Reviews

4.1 out of 5 stars

Most Helpful Customer Reviews

11 of 11 people found the following review helpful By Dangiel on 3 Jan 2013
Verified Purchase
The transmitter itself it great, it send reliable heart rate stats to my horizon cross trainer, however the fact you cannot change the battery and have to discard the transmitter is a joke, in the modern day where recycling widespread to require you to discard a perfectly useable device and purchase another due to a battery needing to be changed is ridiculous.
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26 of 27 people found the following review helpful By A. J. Montgomery on 8 Jun 2010
Verified Purchase
I have an old Polar wrist watch/pulse monitor. I was frightened that when the chest piece-transmitter broke that I would have to buy a complete new kit. I need not have worried as the signal transmission seems not to have altered with fashions. I was very pleased to be able to buy this replacement which works perfectly with my watch. Thank you Polar for looking after your customers.
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5 of 5 people found the following review helpful By STOCCA on 10 Jan 2013
Verified Purchase
I bought this for use with equipment at the gym - notably a Precor treadmill and a STAR TRAC spinner. I decided on the uncoded version as it was cheaper than the coded and had never seen another gym user using a HRM. Before i used it I read that STAR TRAC will only recognise coded straps but was relieved when it did connect and it worked really well - stayed connected. No interference luckily but that was due to spinners being in the far corner of the gym away from most equipment and no other users wearing HRMS.

However on the treadmill my HRM was detected on treadmills both sides of me and I also found the connectivity and measurements were erratic - this could be due to the fact that the HRM was trying to connect to other equipment near by. I would recommend paying a bit extra and buying a coded one.

Also you cant changed the battery on this. When its dead its dead - however you do get 2400hrs / 5 years of use
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7 of 7 people found the following review helpful By Stephen Webb on 21 Jun 2012
Works really well no issue connecting it to any of the equipment at the gym. very easy to put on. Great.
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5 of 5 people found the following review helpful By D'Hug on 28 Jun 2012
Verified Purchase
I purchased this heart rate monitor as all the ones at my gym had disappeared. I didn't want or need anything but that which I ordered. It works both in the gym with the Technogym treadmill and in the spin studio with the Keiser bikes. It is ready to be used and comes with an adjustable belt. I am very happy with my purcahse.As it is mine I don't have the displeasure of someone else's sweat on it. Yippee !
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1 of 1 people found the following review helpful By ChrisR on 9 July 2013
Verified Purchase
I bought mine as a replacement for the standard, fabric-based transmitter that shipped with my Polar HRM. I'd been having real problems with the standard transmitter sending crazy readings after extended periods of operation (as have many others judging by the reviews here and elsewhere).

I suspected that the failure of my original transmitter was due to moisture getting in via the battery compartment, which is located at the rear of the standard unit. Quite why Polar placed the battery compartment seal right next to very wet and sweaty skin is beyond me.

I came to this conclusion having tried every kind of practical remedy suggested by fellow sufferers, none of which made a massive difference. I tested my theory by sealing the back of the unit with tape and vaseline - it worked - but was pretty uncomfortable; although I did at least get some evidence for the moisture theory. I could well be wrong, but the correlation seems fairly strong.

Anyway back to this device! the uncoded (but hermetically sealed) old-style belt ! Hasn't missed a beat, literally in this case, despite some very long and hot runs. Yes it's uncoded, yes it might be a little less environmentally sound - but it works. Polar used to offer a recharging service back when this design was standard issue, not sure if they still do.
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9 of 10 people found the following review helpful By Mark M on 7 Jun 2011
Verified Purchase
Fine to start with, but after only 5 months the battery seems to be dead and, of course, it can't be replaced.
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24 of 28 people found the following review helpful By R. Stark on 28 Nov 2010
Verified Purchase
I bought the Polar T31 as a replacement for one whose battery was depleted. While the product works well I downgrade it because of the manufacturer's designing it so that depleted batteries cannot simply be replaced. The company does make other models (more expensive, naturally) whose batteries can be changed but it is very "un-green" to make any products that need to be thrown away simply because a battery cannot be replaced. As a protest, I will replace the Polar receiver with another company's product when my current Polar transmitter's battery is depleted -- unless Polar changes its policy with regard to non-replaceable batteries.

I should add that the battery to the receiver of the model that comes with the T31 can be changed but the manufacturer recommends that the product be taken to an authorized repairer to effect the change. I managed to do it myself but it wasn't easy and there were no instructions in the product manual. Again, this is very bad policy and quite anti-consumer. Again, more expensive models are describe as having batteries that can be replaced by the owner. This is bad. I expect better of a Scandinavian manufacturer.
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