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

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

Was a little nervous after reading a few more negative reviews but after a 50 mile ride (dry) I’m happy with the connection and data to my head unit. Have used an additional cable tie and different bands to secure both cadence and speed sensor . Put the speed on the rear wheel hub and connection is continuous and stable ( I probably should have used front hub for a more direct signal though)

Required a couple of sensors for speed and cadence so I could use my classic turbo trainer with cycling apps. I went for the Magene S3+ in the end as they were small enough to fit my rear hub. Was a little concerned they wouldn't work properly or they'd be inaccurate but I had nothing to worry about. I've tried these on both Bluetooth and ANT+ and they work perfectly. No messing around just wake them up and your app will pick them up through the chosen connection. I installed the Magene app to manage the devices and set the mode cadence or speed. That was straight forward. They seem to have also been shipped with the latest firmware. I've tried these with Rouvy and they work. I haven't cross checked the accuracy of the sensors yet but my cadence and speed seem to be on par to my road cycling with similar effort. I've also connected them to Bkool with no issues. We'll see how long they last or if there's any issues with them but it's too soon to tell. So far I'm really happy with the sensors and would recommend these. If you're looking for well priced, small, magnetless sensors then you've found them. Great value.

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

easy to install and initially connected to Garmin 820 Edge on my internal trainer however 2 days in the Bluetooth connection to the speed sensor is lost - tried forgetting the sensor and re connecting and now won't connect at all - disappointing results. connection to the cadence sensor has been ok and connects without a problem. may try another set after returning these as the price is very good.... if they work

This is my third purchase for another bike replacing the Garmin magnetic sensor. Lighter and simpler. Good reliable product. Remember to check what the se sensor is set to by the red or green led.

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.

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.