@Tieutieu Thanks mate, I really like the look of the orange 8 so will probably take a punt on that

@Francesco-Pagano however there are 2 straps (different sizes) in the package, so the price is still good I believe

@herlas said in Smart Sensor faulty recording and discrepancy with the display: @Yves-Jenni what’s your watch? The Suunto Run @Gunnar said in Smart Sensor faulty recording and discrepancy with the display: You can find the support chat in the app. Ah, Thank you

Since I have somewhat of a scientist’s ethos and realised that the Suunto HR belt with module could be used in four different combinations, I felt that I also had to provide data for all of them, to prove or disprove the warning in this topic’s heading; “Beware module orientation”. The belt itself can be worn ‘correctly’ with the closing hook and loop on the left side of the torso (hook going down through the loop), or upside down on the right side of the torso with the hook going up through the loop. On my belt there are no markings at the electrode ‘snap-in holes’ other than the in-between text “MOVESENSE”. The ‘correct’ belt position still feels awkward to me after half a year of usage since I’ve had so many years with both Garmin and Polar belts, which both close on the right side of the torso… On this belt then, the module can be snapped in correctly, with the SUUNTO logo pointing upwards (red triangle above text) aligning with the reading of the MOVESENSE text orientation, or be flipped into an incorrect position upside down. The module has markings of L and R at the electrodes but, as said, nothing corresponding on my belt. Calling ‘correct’ position Up and incorrect Down I have logged the following results: BeltUp-ModuleUp (Pulse OK, HRV OK) BeltUp-ModuleDown (Pulse OK, HRV Not-OK) BeltDown-ModuleUp (Pulse OK, HRV OK) BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK) In my opening postings of this subject I included screenshots from the first two combinations. Looking at the third and fourth results, where one had OK pulse while the other had massive misreadings might be a fluke with either one, OR the last combination really do exacerbate the position problem. No way to know without doing a large number of experiment sessions. I’ll skip screenshots from the BeltDown-ModuleUp (Pulse OK, HRV OK) session Wed 30/7 since it was so clean in both areas. I’m using the OHR of a Garmin FR955 with the old Firmware 19.18 as control - normal result is +1 to +2 bpm against both a Polar H10 and the Suunto belt at all kinds of running efforts (my skin/wrist really agrees with OHR, also on the Race S). Instead I will end this posting with data from yesterday Fri 1/8 BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK) and a closing BeltUp-ModuleUp (Pulse OK, HRV OK) from today Sat 2/8 to really underscore that my belt is A-OK in a correct position. Not worn out, and locked to a constant length by a safety pin at the adjustment point. Fri 1/8 BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK): [image: 1754147758046-1000008639.jpg] [image: 1754147816494-1000008640.jpg] [image: 1754147848503-1000008641.jpg] Sat 2/8 BeltUp-ModuleUp (Pulse OK, HRV OK): [image: 1754147943930-1000008642.jpg] [image: 1754147990362-1000008643.jpg] The only conclusion I can draw is that some sensor inside the module interferes with the HRV and possibly HR data when not in an imagined ‘correct’ position. This then would most probably be a software problem. But since I am not offered any method to upload a new SW version, it might as well be called a hardware defect.

@Gunnar said in Suunto Athletics 7 loop strap: @Stefano-M64 at least for me the stress on this part happens when you open the strap and it hits the spring. mine stops at the first velcro pad, maybe because I can pull the watch out very easily (L size)

@sartoric Fair point but considering my old version has performed perfectly for over 10 years I would’ve happily bought another one I’ll just be happy to have a working belt again as I used the watch OHR yesterday & the end result was laughable [image: 1752997598199-60e0f61c-4a40-40a8-a02e-697aac00aaf3-image.png]

@Patrick-Holling Cheers from Hamburg

@flexh88 I don’t think anything has changed on the smart sensor. The belt was updated a few years ago to make it more durable. I’m using ZoneSense with a polar H10, which had the advantage of cheep 3rd party replacement belt supply. The advantages of the smart sensor over the H10 is the smaller size/weight and the capability to store HR data in is memory while BT connection is broken (like in the pool).

@tinten.addi Got it, I just checked out the UK website and it is the old style.They have changed the website in the US and it does not have several of the items that are available in the UK. Having said that, the Run is in stock in the US so… Suunto is so special.

This would be a good idea because the current offer for cyclists is very poor - e.g. sensors, import and integration of activities from other services and devices.

@aamado said in Using Suunto heart rate belt for scuba diving: Hello Everyone, Can the Suunto heart rate belt monitor be used for scuba diving? I’m thinking that, when diving in cold waters, I won’t be able to use the HR sensor from the watch (not even sure if it works underwater!), so using the chest belt for HR might be an option. Maybe better with dry suit to avoid getting wet but not sure if pressure can damage or even break the sensor which isn’t something pleasant to happen during a dive! Any thoughts on this topic? Thanks, Antonio Interesting question. I have never dived with a heart rate monitor but I swim a lot with OWS and in the pool with a heart rate monitor. I think it can be done but only with the Suunto Heart Rate Belt because Bluetooth does not work underwater. The Suunto sensor has its own internal memory and can work independently with the watch after starting the activity. After finishing, the data is automatically transferred to the watch. If you want to dive with Suunto “OCEAN”, I don’t know because I don’t know this model. The only limitation is depth. According to the manufacturer, the water resistance is up to 30 meters.

@larrybbaker ah very useful for my other devices too, you can even see the data from the hr senson in hex values

@herlas Never run that race (my daughter has) and I likely never will:). I will be out of town on that day.

I have the same issue, any idea how to fix it?

@martin720601 The Suunto smartsensor has only 1 bluetooth channel and no Ant+. It will only transmit to 1 device,

@Ecki-D. To complement, maybe that would help too. When you use the activity you don’t need to have HR wist additionally turned on, OHR starts automatically. The rest was perfectly explained by @Mff73 .