Mopeka Pro Check Universal Sensor - Bluetooth Ultrasonic Sensor for Steel Propane Tanks - Perfect for Propane Grills, Water Tanks & Campers - Water Level SensorUp to 250 Gallon Tanks

These Mopeka sensors work well and add a new level of convenience to monitoring propane levels. There was a period where this new Universal model was incompatible with the Victron Cerbo GX, but I am happy to report that this situation has been resolved. I can check the levels using the Mopeka app; and they now show up on the Cerbo as well. How far we've come from having to pop open the propane compartment and look at a gauge that may or may not be accurate. A few installation tips: — The process is very easy; however, you will be asked to position the sensor so its position appears inside a little circle that shows in the Mopeka app. I've never seen anyone successfully do this, either in person or in a YouTube video. It seems like the best one can expect is for the position indicator to be touching the little circle. Don't sweat this. Everything will still work. I ended up using a ruler to position the sensor. — My least favorite thing about this product is the fact that there is nothing to hold it in the spot that you've so carefully measured out. The sensor has pretty powerful magnets to hold it to the tank, but once you lube it up with dielectric grease it will slide around on the tank's surface. Annoying. Mopeka does offer a collar that can be stuck on the bottom of your LPG tank with 3M VHB tape to lock the sensor into position. This is what I have done. (The company makes two different collars. Make sure you get the one for LPG tanks.) — These sensors come with three little aluminum spacers designed to clip to the bottom of your tank in order to provide extra clearance. You may or may not need them. I did. These spacers can come loose. I would suggest using an adhesive/sealant to lock them in place. Also, these will definitely scratch up whatever the tank is sitting on. — For those needing spacers but not wanting to scratch up their propane tank compartment, Mopeka offers the "Halo", a plastic ring that goes on the bottom of your tank. These will also need to be attached with an adhesive/sealant if you want them to stay on. Unfortunately, these Halos offer less additional clearance compared to the free aluminum spacers. If you choose to use the collar I mentioned earlier, the Halos probably won't work for you. They didn't for me. Seems like this is something that Mopeka should have been able to anticipate. — Keep in mind that these spacers protect your Pro Check sensor when it's sitting on a flat surface. The teenage kid filling your tank can still set the tank down on an uneven surface or a rock and crush it. And if this kid drags the tank on the ground and knocks off one of the spacers, the sensor could get damaged on a flat surface. Bottom line: pay attention when someone else is handling your LPG tank. I'm tempted to deduct a star due to the incompatibility between the Mopeka Halos and the collars but this is a review of the sensor itself, so I won't. These sensors are game changers. I love them and I recommend these as the best solution for anyone with a propane tank they want to monitor. Five stars.

This Mopeka Pro propane tank sensor is an absolute game-changer for my off-grid camper! The setup was incredibly easy and took just a couple of minutes. I love being able to check my propane levels right from my phone without ever stepping outside, which is a lifesaver during cold winter months. It's so accurate and reliable, giving me total peace of mind knowing I won't unexpectedly run out of fuel. I seriously can't imagine camping without it now! If you rely on propane, you definitely need one of these.

This was easy to set-up using the app and has good range using Bluetooth. I tried it on 3 different 20lb cylinders of known quantity of LPG and it read them all accurately. It sticks to the bottom fairly well, but they are rounded so it takes a few seconds to center the sensor. For my use they adhere well enough. I would not be so liberal with the grease, it only needs a dab on the sensor. This should help with movement once centered. As for replacement Mopeka grease you can buy some here on Amazon, or any silicone dielectric grease works perfect. It is the same. I am overall very pleased with this device. It is not cheap, but it's accurate and does the job well. I wasted a lot of money on inaccurate inline gauges and a scale device. The scale does work, but requires disconnection and lifting of the cylinder, and can't give you a real-time reading. Now I know at a glance where I stand gas wise.

I have tried every sensor this company has and none of them work. The iphone app does not read anything but "Empty." My tanks were just filled at the hardware store so I know they are full. I also have a small reader with lights and it also read "empty." I have used dielectric grease and have moved the sensors n the bottom of the tank around to different locations in the center of the tank bottom. All readings: "Empty." So as far as I am concerned these do not work. I have 2 30 gal tanks on my RV. UPDATE: and speaking with the representatives from the company, who were very conscientious and honest, I found that the problem was mine. The tanks that I have have a thick paint coating, which is inhibiting the signal. So the sensors are fine. And they do their job. I had to alter the paint coating on the bottom of my tank in order to get the sensors to work.

This gadget is AWESOME! We use this for our tanks on the front of our food truck. Anytime during our shift, we can quickly open the app and check the levels. This is so much better than having to go outside and physically check. Can't say enough how much I love and appreciate this item! Always accurate. Never any connectivity issues. If you didn't know it was on yhe tank you would never know, it's not visible unless you make it visible.

EDIT - I previously rated this 3/5 stars due to only 1 of 2 units working properly. However, the seller quickly contacted me and resolved the issue with a refund. Because of the quick response from the seller, I'm updating to 5/5 stars for the superb handling. The other unit I have works fine. Also, many comments on here say the battery is not replaceable, that is not true. There's 4 small indentions on the faceplate of the main body of the sensor where you can insert a small flat object (like a flat-head screwdriver) and pop the face cover off which will expose the internal components and the battery. I just wanted to add that, as there are quite a few comments claiming the battery isn't replaceable. Below is my original review of the Mopeka sensor. I ordered 2 units and despite having trouble getting 1 of the 2 units to work as well as my other, I'd still recommend buying if you're looking at these as I may have just gotten unlucky. But because the seller contacted me so fast and resolved the issue, they get an "A+" in my book. ----------------- I purchased 2 of these for my 2 100lb vertical tanks. Set up was very easy and it linked to my phone via Bluetooth immediately. I followed the instructions for the first one and immediately got an accurate reading and a max star quality reading (1 is low quality and 3 is max quality sensor reading). I then installed the 2nd one on the bottom of the 2nd tank and no matter what I did, it kept giving me an error message on my phone saying the sensor was not properly placed for an accurate reading. I tried cleaning the bottom of the tank, cleaning the sensor, re-synchronizing the device, adding more gel to the sensor, recalibrated the level system, and nothing worked. I decided to just roll with it and see if it would work. It sort of works, but not nearly as good as the first one. After two weeks (and trying all the above AGAIN) , it still says the sensor is incorrectly positioned. Furthermore, it has trouble updating as frequently as my first sensor as shown in the screenshot. It struggles to update itself, which is frustrating when I'm using that specific tank. Sometimes it updates, sometimes it doesn't. See in the screenshot where my first good sensor updated immediately and my 2nd sensor hasn't updated for 22 hours. These tanks are right next to each other, so it's not a range issue. I don't know if this is a Bluetooth limitation or I got a defective unit, but considering the sensor issues I'm having with my second one, I'm leaning towards a defective unit. If I didn't have these issues, I'd no doubt rate 5/5 stars as my first one I've had zero issues with. It updates almost immediately when I open the app, says I have a good sensor reading, and is giving me an accurate reading. I can see the fuel deplete slowly in real-time while I'm using it. The second sensor, does none of those things. Lastly, my only other comment is that the low fuel level warning option in the app is a bit pointless as you basically have to have the app open to get a current reading of your tanks The app will not update the tank fuel levels if the app is closed or if it's been in the background for an extended period of time. I was looking forward to using this alarm feature as these tanks heat our house, but was very disappointed when I realized this limitation of the app having to be open on your phone. As it makes it a bit pointless when my tank is low, but I haven't received a notification on my phone. But then when I open the app and it updates and it recognizes my tank is low, THEN I get a phone notification that the tank is low. So I just turned this feature off. Otherwise the app itself is great! No bloatware, very simple design, easy to use, options to select various sizes tanks, able to rename and even put tanks in groups, etc.

I have just this week received and installed the sensors. Following instructions they were easy to install. I found the app to be user friendly and everything seems to be working correctly. I look forward to being able to check the tank from within the warmth of my RV instead of having to brave the cold to check pressure gauges that may or may not be working. Would recommend while hoping they continue to work at this level.

I am impressed with how well these things work. Far better than a pressure gauge. Even if they are only five percent accurate, they are worlds better than pressure. The setup is easy except for having to press the button to start syncing and trying to get it leveled according to the app. It takes a few tries. I was pleasantly surprised to see that these automatically connected to my Victron Cerbo GX, so I don’t even have to use the app.