TOPARGEE H2Flow Bluetooth RV WATER TANK GAUGE

Topargee H2Flow Bluetooth Water Tank Gauge

The Topargee H2Flow (H2F-BT12) is a Bluetooth flow-meter water gauge for caravan, RV and boat fresh water tanks. Instead of a tank-mounted probe, an inline flow sensor fits into your water line and measures every litre that passes through, so readings stay accurate even when your rig is parked on a slope or uneven ground.

Water level, in litres or gallons, is shown on the free Topargee smartphone app rather than a wall-mounted panel. The Bluetooth module works offline within about 5 metres, so no internet connection or fixed digital display is needed, and multiple phones can pair to the same unit since its settings are stored on the module itself.

Key Features

• Inline flow-based measurement — no drilling or probe fitted inside the tank
• Programmable tank capacity up to 99,999 litres
• Free Topargee app for iOS and Android, Bluetooth range approx. 5m, no internet required
• Runs on 2 x AA batteries or an optional 12V connection
• Works with pressure-pump and gravity-fed water systems
• Australian designed and made, 12-month warranty

• Brand: Topargee
• Model: H2F-BT12
• Measurement method: Inline flow sensor (not a tank probe)
• Connectivity: Bluetooth, approx. 5m range
• App: Free Topargee app (iOS 10+, Android 8+)
• Max programmable capacity: 99,999 litres
• Power: 2 x AA batteries or 12V (adapter/resistor required, not included)
• Units: Litres or gallons, switchable
• Application: Fresh water tanks; suits pressure-pump and gravity-fed systems
• Warranty: 12 months

Does the H2Flow work with grey or waste water tanks?

No — the H2Flow is designed for fresh water tanks. It measures flow through the water line rather than sensing level inside the tank itself, so grey and waste tanks (which don't have a metered supply line) aren't compatible.

Do I need to drill into my tank to install it?

No. The sender fits inline in your water pipework — typically about 200mm downstream of the pump, before any filters or taps — so no drilling or modifications to the tank itself are required.

Does it need Wi-Fi or mobile data to work?

No. The gauge connects directly to the free Topargee app over Bluetooth, within about 5 metres, and works fully offline — handy when you're off-grid.

How is it powered?

The module runs on 2 x AA batteries, or can be wired to a 12V supply using an appropriate adapter/resistor (not included).

Can I monitor more than one tank?

Yes — the app supports multiple tanks, and you can programme the capacity of each tank up to 99,999 litres.