TOMTOP JMS Water Level Indicator: Smart alarm system
Available Options

Ever found yourself guessing how much water's left in your marine boat or RV? Say hello to the Water Level Indicator—your new best friend for keeping tabs on H2O levels without the guesswork. It's not just smart; it's got a smart alarm system that'll give you a heads-up when water hits a certain mark, so you're always in the know. And yeah, it plays nice with 32V DC, sticks to European sensor standards, and boasts a 190 Ohm resistance for spot-on accuracy every time.
But wait, there's more (and no, we're not selling knives on TV):
- First off, that 52mm (2 inch) display? Crystal clear, so you won't need to squint.
- Built like a tank for the rough and tumble of marine life—because the ocean doesn't do 'gentle'.
- And installation? A breeze. You'll be up and running before you can say 'Where's the manual?' (Hint: You won't need it.)
- 32V DC compatible
- European sensor standard
- 190 Ohm resistance
- Marine and RV use
- Smart alarm system
General specs
- Brand: TOMTOP JMS
- Seller: Joom
- Compatibility: 32V DC
- Resistance: 190 Ohm
- Sensor Standard: European
- Display Size: 52mm (2 inch)
- First listed by seller: 6/21/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
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Brand | TOMTOP JMS | Wuherote | yeetuand | Fujeenn | Fishine | Rustic Elegance House |
Model | ||||||
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Rating |
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Price | $23.29 | $7.80 | $7.58 | $7.58 | $37.88 | $28.24 |
Seller | Joom | Joom | Joom | Joom | Joom | Joom |
Update | August 29, 2025 | August 17, 2025 | August 17, 2025 | August 17, 2025 | August 30, 2025 | August 30, 2025 |
Compatibility | 32V DC | Aquariums, Water tanks | Car, Truck, Boat |
Andrew R.
Dallas, TX
July 1, 2025
i bought this as a gift for my brother who's into boating, and as it seemed to me, it's a decent gadget overall. the clear display and essy setup are definite pluses, and it integrates well with standard systems without fuss. but that alarm issue is a real bumer—it's supposed to warn you, but it's not always on the ball. accuracy could be better too; i've had a few instances where it showed levels that didn't match reality, which is frustrating when you're trying to avoid running out of water. for the price, it's okay, but i wish it were more dependable. maybe good for casual use, but not if you need something super precise. 😕
- Pros: the display is very clear and easy to read without any squintung, which is great for quick checks. installation was super simple, and i had it set up in no time without needing to look at any instructions. it feels sturdy and well-made, handling bumps and vibrations just fine, so i'm confident it'll last in rough conditions.
- Cons: long story short, the alarm system didn't work as reliably as i hoped; it seemed to miss some alerts when the water level changed, which was a letdown. also, the accuracy wasn't always spot-on, someties showing readings that were a bit off from what i expected, making it less trustworthy in critical moments.