Alarm or monitor ยท Proteus

Proteus L5 Wi-Fi Water Level Monitor

A simple Wi-Fi level sensor

Updated October 2026

Quick verdict

A capable, simple level monitor.

Strength
Set your own thresholds.
Trade-off
No backup battery listed.
Right buyer
Sumps and tanks.
Dimensions (seller)
3.5"L x 3.5"W x 2"H
Prices change often; the button shows today's price.

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Why it matters

The Proteus L5 connects straight to home Wi-Fi, with no hub, and sends alerts when water rises above or falls below levels you set. You can watch the level live online.

It plugs directly into a wall outlet, which keeps installation simple, and suits sumps, tanks and other water-level monitoring.

Who it's for, and who should skip it

Good fit if

  • Sump pits and tanks
  • Owners who want custom thresholds

Look elsewhere if

  • Power outages without backup power
  • Homes without Wi-Fi

Pros and cons

Pros

  • No hub needed
  • Custom thresholds
  • Live view

Cons

  • No battery backup stated
  • Needs Wi-Fi
  • Sensor placement matters

Limitations to weigh

  • Wi-Fi alerts need a working router and power; units with a backup battery keep the local alarm sounding in an outage.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Compatible devicesSmartphoneRetailer
Dimensions (seller)3.5"L x 3.5"W x 2"HRetailer
Mounting / installationWall MountRetailer
Model numberSpeed8Bgreen_SMLRetailer

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Final verdict

A simple sensor if you mainly want phone alerts.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

Does the L5 need a hub?
No, it connects directly to Wi-Fi.
Can I set high and low alerts?
Yes, both are programmable.