Wireless RV Tank Monitoring
No Drilling Required
- Works on all types of RVs
- No drilling into tanks
- iOS + Android App
- Bluetooth + optional WiFi
- Installs in minutes
- External Mount Sensors
- Installs in minutes with self adhesive
- No tools. No tank penetration
- Reads liquid level from outside the tank – no contact with waste
- Works through plastic tank walls up to 1/2″ thick
- Monitor Multiple Tanks: Keep track of up to 10 different tanks—black, gray, and fresh—simultaneously with the TankMasters.
- Notifications: Receive timely notifications on your iOS or Android device when the tanks reach predefined thresholds – Low for Fresh water tanks, High for Gray and Black water tanks. Stay informed and avoid overflows or unexpected surprises.
- Prevent Tank Overflows: Stay ahead of the game by knowing when your tank is approaching full capacity. Take proactive measures to prevent messy overflows and maintain a hassle-free experience.
- Contactless Sensor Technology: The monitor utilizes contactless sensors, eliminating the need for modifications to your tanks. Simply mount the sensors using the included double-sided tape to the desired areas of your tanks.
- Dependable and Accurate Readings: Rely on the Bluetooth wireless RV holding tank monitor for precise and reliable readings, ensuring you have accurate information about your tank levels when you need it most.
- Contactless Sensor Technology: The monitor utilizes contactless sensors, eliminating the need for modifications to your tanks. Simply mount the sensors using the included double-sided tape to the desired areas of your tanks.
- Adjustable Sensitivity: The contactless sensors feature adjustable sensitivity, allowing you to account for sludge build-up and ensure accurate and dependable readings over time. Customize the sensitivity to match your specific tank conditions.
- Easy Installation: With a user-friendly installation process, simply mount the sensors using the included double-sided tape to the sides of the tanks where you want to monitor the tank levels. Install the TankMaster wireless sending unit nearby (within 18″) using double-sided tape as well. No complicated modifications required.
- App: Use the intuitive app to monitor your tank levels in real-time, no matter where you are within a 30-foot range of your RV. Stay connected and in control. Compatible with iOS and Android.
- Monitor Multiple Tanks: Keep track of up to three different tanks—black, gray, and fresh—simultaneously with the TankMaster sending units.
- Notifications: Receive timely notifications on your device when the tanks reach predefined thresholds – Low for Fresh water tanks, High for Gray and Black tanks. Stay informed and avoid overflows or unexpected surprises.
How RiVöt TankMaster Works
RiVöt TankMaster is a contactless RV tank monitoring system designed specifically for retrofit installations on existing RVs.
Instead of placing probes inside the tank, TankMaster sensors mount externally to the outside wall of the tank using adhesive attachment. Because the sensors never contact the tank contents, they are not affected by residue buildup, corrosion, or fouling over time.
Multiple sensors can be installed on a single tank to improve accuracy across varying tank shapes and sizes. Sensor readings are processed by the TankMaster unit and transmitted wirelessly to the TankMaster mobile app, providing real-time tank level information directly on your phone or mobile device.
TankMaster connects via Bluetooth for everyday use, with optional Wi-Fi support for extended range and integration. All configuration, calibration, and alert thresholds are handled through the app, allowing the system to adapt to your specific RV and usage patterns.
TankMaster - 18" Cables
TankMaster - 36" Cables
Trusted by RV Owners
🇺🇸 Designed in the USA – 📱 iOS & Android compatible – 30-day money-back guarantee – 1-year warranty
Specifications
| Product Basics | |
|---|---|
| Product Name | RiVöt TankMaster V2 |
| Function | Wireless RV tank monitoring system |
| Tank Coverage | One TankMaster unit per tank |
| Designed By | Puffball Designs LLC, USA |
| Typical Installation Time | Approx. 30–60 minutes depending on tank access and cable routing |
| No Tank Penetration Required | External sensor system requires no drilling or tank penetration |
| Tank / Sensor Compatibility | |
| Supported Tank Types | Fresh water, gray water, and black water holding tanks |
| Not Compatible With | Metal tanks, black tanks using salt-water flush systems, tanks with heavy internal mineral/salt buildup behind sensor mounting area, or ribbed/heavily textured surfaces that prevent flat sensor mounting |
| Tank Material Compatibility | Non-metallic tanks including polyethylene and fiberglass |
| Wall Thickness Compatibility | Supports tank walls up to 15 mm thick |
| Number of Sensors | 4 external sensors per unit |
| Sensor Type | Capacitive non-contact external level sensors |
| Sensor Protection Rating | IP65 splash resistant when properly installed |
| Sensor Mounting | External adhesive mounting to tank wall |
| Cable Length Options | Available with 18″ or 36″ sensor cables (model dependent) |
| Environment | |
| Installation Environment | Sensors rated IP65 for wet bays or exterior tank areas. Sending unit must be installed in a dry, protected RV compartment or service bay away from direct water spray, standing water, prolonged high humidity, or condensation |
| Operating Temperature | -20°F to 140°F (0°C to 60°C) recommended |
| Storage Temperature | -40°F to 140°F (-20°C to 60°C) |
| Power | |
| Power Input | 5V DC via USB-C (4.75V–5.25V DC) |
| Included Power Accessories | USB-A to USB-C cable and 12V-to-USB-C RV converter cable |
| Typical Current Draw | ~200 mA (WiFi + Bluetooth active with 4 sensors connected) |
| Peak Current Draw | Up to 400 mA during wireless transmission |
| Connectivity | |
| Wireless Interfaces | WiFi 2.4 GHz (802.11 b/g/n) and Bluetooth Low Energy (BLE 4.2) |
| Wireless Range | WiFi up to 100 ft line-of-sight; Bluetooth up to 30 ft depending on RV construction and mounting location |
| LED Indicators | Status (Red), Bluetooth (Blue), WiFi (Green) |
| Physical Specs | |
| Sending Unit Dimensions | 5.5″ × 3.5″ × 1.5″ |
| Sensor Dimensions | Approx. 1″ × 1″ × 0.75″ each |
| Weight | Approx. 8 oz (227 g) |
| Materials | PETG polymer enclosure; UV-stable sensor housings with high-strength adhesive mounting |
| Software / App | |
| Mobile App Compatibility | Compatible with iPhone, iPad, and Android phones/tablets |
| Connection Modes | Bluetooth for setup and nearby monitoring; WiFi for extended range and local network monitoring |
| Firmware Updates | User-installable through the RiVöt TankMaster app via Bluetooth or local WiFi |
| Smart Home Integration | Supports Home Assistant via HACS integration |
| Reliability / Support | |
| Historical Data | Device stores recent local sensor history; mobile app maintains rolling tank usage and level history |
| Maintenance Notes | Tanks should be cleaned periodically. Heavy internal buildup or residue may reduce sensing accuracy over time |
| Installation Notes | Proper sensor placement and secure cable sealing required for best performance |
| Legal / Patent | |
| Regulatory Compliance | FCC Part 15 compliant. Contains FCC ID: 2AC7Z-ESPWROOM32E |
| Patent | Protected by U.S. Patent US 12,607,496 B2 |
| Note | Specifications subject to change without notice as product improvements are made |
What Makes TankMaster Different
Most RV tank monitoring systems rely on outdated sensor designs or assumptions that don’t hold up in real-world use. TankMaster was designed from the ground up to solve those limitations.
Unlike traditional internal probes, TankMaster uses external, contactless sensors that never touch the tank contents. This eliminates common failure modes caused by residue buildup, corrosion, and fouling over time.
TankMaster also supports multiple sensors per tank, allowing readings to be tailored for different tank heights and shapes. This provides more consistent and repeatable level measurements compared to single-point sensors.
Configuration is handled entirely through the mobile app, rather than fixed hardware thresholds. Alert levels, tank types, and sensor behavior can be adjusted to match your RV and how you actually use it. Firmware updates allow the system to improve over time without replacing hardware.
The result is a tank monitoring system designed for retrofit installation, long-term reliability, and real-world accuracy — not just laboratory conditions.
- Contactless external sensors — no probes inside the tank
- No drilling or permanent tank modification
- Multi-sensor support for improved accuracy
- App-based configuration and alerts
- Works with iOS and Android devices
- Bluetooth Low Energy (BLE) connectivity
- Optional Wi-Fi connectivity
- No ongoing subscription required
- Firmware-updatable system
- Designed in the USA
Why RV Tank Monitoring Is Harder Than It Should Be
Most RV tank level systems are frustratingly inaccurate. Factory-installed probes often foul over time, internal sensors require drilling into tanks, and many aftermarket solutions rely on a single measurement point that can’t account for irregular tank shapes.
RV owners are left guessing:
• Is the tank actually full, or just triggering a bad sensor?
• Is it safe to keep using water, or is a dump overdue?
• Why does the reading change while parked?
These problems are especially common with black and gray tanks, where residue buildup and inconsistent tank geometry make traditional internal probes unreliable. Drilling into an existing tank also creates long-term leak risk — something most RV owners want to avoid entirely.
Tank monitoring shouldn’t require invasive installation or blind trust in unreliable readings. It should be accurate, repeatable, and easy to retrofit on an existing RV.
Frequently Asked Questions
Does TankMaster work on black water tanks?
Yes. TankMaster sensors mount externally on the outside of the tank, so they are not exposed to waste, residue, or buildup inside the tank. This makes TankMaster well suited for black, gray, and fresh water tanks. Not compatible with metal tanks, tanks with heavy mineral or salt buildup behind the sensor mounting area, or tanks used with saltwater flush systems that leave salt deposits on the tank wall.
What kind of tanks does TankMaster work with?
TankMaster works with non-metallic RV tanks, including common materials such as polyethylene and ABS. The system is designed to operate through tank walls up to approximately 15 mm thick.
Not compatible with tanks that have been used with saltwater flush systems that have salt or mineral buildup on the tank walls.
Metal tanks are not supported, as metal blocks the sensing technology used by TankMaster.
Do I need to drill into the tank to install it?
No. TankMaster installs externally and does not require drilling or penetrating the tank wall. Sensors attach using adhesive mounting, making it ideal for retrofit installation on existing RVs.
Will TankMaster work with irregularly shaped tanks?
Yes. TankMaster supports the use of multiple sensors on a single tank, allowing readings to be averaged across different tank heights and shapes. This improves accuracy compared to single-point sensors.
Does TankMaster require Wi-Fi to work?
No. Bluetooth Low Energy (BLE) is sufficient for normal operation and everyday monitoring. TankMaster supports optional Wi-Fi connectivity for extended range and integration.
What phones are supported?
TankMaster works with modern iOS and Android devices through the TankMaster mobile app for both phones and tablets.
Can I monitor multiple tanks?
Yes. Each TankMaster unit is configured for a specific tank, and multiple tanks can be monitored within the app, such as fresh, gray, and black tanks.
Is there a monthly subscription required?
No. TankMaster does not require an ongoing subscription.
What's In The Box
- TankMaster Controller (Bluetooth/WiFi)
- 4 External mount adhesive sensors with 18″ or 36″ cable pre-attached to controller
- Adhesive mounting pads (3M VHB)
- 5V USB-C power Cable
- 12V RV Power Converter (USB-C)
- Quick start guide
RiVöt™ TankMaster