Magene S3+ Cadence & Speed Sensor for Cycling, Bluetooth & ANT+ Bike Sensor Compatible with Android/Iphone and Bike Computer

Works brilliantly. Cannot fault it at all. Unlike the couple of reviews that are negative about the device and its compatibility with certain apps, it has been known for quite some time that a lot of apps are moving away from permitting third party devices work with them or require you to have a paid subscription to be able to do so, Strava one of these. So bearing this in mind blame the app developers and check before hand. That said I have Strava premium account so no loss for me and it works a treat. Set up, once the fiddly part has been done, using the supplied fixing kit, getting the sensor fitted to the back wheel and paired with my phone is straight forward just like their heart rate monitor that I also use which I can say has been absolutely spot on so far. Can't fault this process at all for either device. Simple as one two three. In use as speed or cadence sensing, I have found the sensor to be just as good as various other premium-priced devices that I have used in the passed. No loss of connections, no bad syncs, no errors at all from my experience so far. Switching between the two modes does require the fiddly part of unclipping from the rear hub and placing replacing the battery but that is nothing, most of the time its fitted and stays put but on some days I will fit the sensor to the crank arm for use on the bike trainer and use the cadence features. No issues with speed or cadence pickup. Given the fact it's on one unit and no magnetic counterpart switching between the two is an acceptable part of such dual usage. To get working you just need to power up your app and Bluetooth and rotate the crank or wheel and the pairing will be instantaneous. Definitely a good device for those looking for a cadence or speed sensor with good reliability but on a budget.

Easy to install and the sensors are picked up by my coospo BC200 computer as well as my Huawei GT6 watch. Great piece of kit for such a low price.

I bought these as Ive recently purchased a set of rollers for my bike when Im warming up for cycle races and wanted to record data while warming up. They work absolutely great, however 2 issues I have with them, the elastic hoops you get with them that secure them to the hub of the wheel or the crank arm are too big. When I fitted the Speed sensor to my front hub, it would move slightly while rotating so I had to add a zip tie to hold it in place. Other issue is the changing of modes. Each unit is identical and the only way to change it from reading speed to reading cadence is to remove the battery and place it back in again. This is a joke and inconvenient at best.

Got this for my stationary bike to be able to match to my coros watch. Works perfectly

EDIT: cost refunded, offered even without me asking, so I'm very happy. I used the sensor with a Van Rysel trainer. The O-ring snapped after a month but any tough elastic band was fine instead. Battery died after about 1,000 miles at circa 80 rpm. With a new battery, the connection was erratic. The lights on the sensor indicated it was online and the cycling app confirmed connection - but no cadence count was shown. Mine may have been a substandard example but I couldn't ask for better service from the seller, and my Magene heart rate monitor is going strong, so I will buy from this company again.

So far excellent bike sensors linked to levyne bike computer within seconds easy to fit , couldn't give sensors a full test as chain snapped 5 minutes in to ride but will fully test functionality when i fix my bike

UPDATE FAULT OF CONCERN My initial experience of taking the product out to the box and using it indoors is reviewed below. Since writing this I have discovered a MAJOR FAULT with my sensor. My MAGENE “S3+ Speed and Bicycle RPM Sensor” DOES NOT enter sleep mode as 1) stated in the product manual/specifications supplied with the sensor and as 2) all other ANT+ and Bluetooth cycle sensors do. It continues to broadcast when not active. This can be seen by using the “thisisAnt.com” smartphone app “ANT+ Plugin Sampler” available on Playstore (I believe a Windows version is also available). This test app finds any ANT+ device which is active and broadcasting (Image 1). I discovered, 1) My Magene sensor stays activated and broadcasting in both Speed and Cadence mode – images 2 & 3. 2) The signal is detectable 5+ metres away (my bike was in my garage and the measurement was taken in my kitchen) Clearly this is a constant drain on the battery and I now see that some other reviewers have commented about short battery life. 3) The user manual states – Image 4 A) “The device will enter sleep mode when static to save power”. B) “Rotating the crank or spinning the wheel is the wake up operation” C) “If the sensor doesn’t be found in 30 seconds it will STOP BROADCASTING and can’t be found any more. I also have several Wahoo cycle sensors and some Lifeline cycle sensors. ALL OF THESE ANT+ sensors stop broadcasting when not active and cannot be found by the ANT+ Plugin Sampler. My Magene sensor does not stop broadcasting when inactive – MY MAGENE SENSOR CONTINUES TO BROADCAST END UPDATE MY INITIAL REVIEW SUMMARY: At the price point (low relative to top brand sensors) the Magene sensor seems good value. It is not as robust as more expensive sensors nor is the fixing method as secure. However, this sensor delivers what might be expected of a low priced sensor. USAGE BACKGROUND: I wanted a low cost cadence sensor to attach to a second bike for use on my turbo I installed the sensor on the bike, linked it to my turbo app and did a 20 mile virtual ride. Following is my first impression and experience. SIZE: It is small and about the same size as the Wahoo sensors. FIXING: The significant difference between the Megene sensor and my other sensors is the way it fixes to the crank. The Magene sensor uses a single rubber band, my other sensors are fixed with cable ties. EASE OF ATTACHMENT: The rubber band fixing is a reason I purchased this sensor. I wanted to be able to quickly and easily remove the sensor from one bike and fix to another. WEAKNESS: I believe the rubber band fixing is a weakness IF this sensor is used on a road bike , there may be a chance of it coming away from the crank. This fixing is not as secure as the cable tie fixing of my other (Wahoo) sensors. WATER RESISTANCE: I would not be happy to use the Magene sensor in very heavy rain or on flooded roads. Firstly it is rated as IP66 – resistant to splashing jets. My feeling is that very heavy rain and very wet roads would stress the IP66 credentials (rating) of the sensor. Also, I am not persuaded that the way in which the battery cover locks in place is ideal. The cover is locked by rotating a tab rather than the more conventional way of using a "coin" in a slot. It seems to me that this could become partly undone and hence not fully water resistant. (The sensor I use on a road bike is rated IP67 able to be immersed to a depth of 1 metre). USAGE Initially I had some difficulty getting the sensor to enter cadence mode. I removed and replaced the battery several times before I could get it into cadence mode. I suspect I was not inserting the battery in a clean single positive action and thus the battery momentarily made contact and then broke contact and then made contact again thus the sensor went into cadence mode but then changed back to speed mode. When I sat down and took care to insert the battery cleanly the sensor entered cadence mode. PAIRING/ACCURACY: I use Ant+ and the sensor was found immediate by my turbo app. There was no delay. In use the sensor seemed to report the cadence I expected and did not appear to loose connection. USE WITH APPS: My Megene sensor paired as well as, and as easily as, my Wahoo and my Lifeline sensors with the apps I use. FYI: I have used severely turbo apps and have discovered that some have difficulty pairing with sensors. One app is so bad at linking and keeping connection with Ant+ sensors that I don't use it. So poor connection could be the fault of a poorly designed app. Also the physical environment might be an issue - distance between the sensor and receiver and electromagnetic interference might also be the cause of poor connection.

These do the exact job of the more expensive brands for a fraction of the price. Couldn't be easier to fit to the bike, the battery lasts forever, and perfectly accurate.