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Grundig S08 Heavy-Duty RV TPMS | 8/12-Wheel Switchable System up to 217 PSI | 5.0" Large HD Display with Real-Time High Pressure & Temp Alerts for Class A/C Motorhomes, 5th Wheels & Commercial Trucks

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$259.00
$370.00 -30% $259.00
Type of Sensors
Please ensure correct model selection prior to checkout.
IMPORTANT: Adjust Alarm Settings Before Use! Default alarm 145 PSI (10.0 Bar ) is for cars.
For RVs/Caravans/Trucks, reset the high-pressure limit (up to 217PSI) BEFORE installation to prevent false alerts.

Core Parameters

  • Compatible Vehicles Optimized for high-pressure monitoring up to 217 PSI, the S08 provides total safety coverage for 8 to 12-wheel rigs, including Luxury Class A Diesel Pushers, Triple-Axle Toy Haulers, and Heavy-Duty Commercial Trucks.
  • Built-in battery capacity 650mA
  • Tire pressure alarm value Default Low Pressure Alarm: 72 PSI (5.0 Bar)
    Default High Pressure Alarm: 145 PSI (10.0 Bar)

User Manual

Need Help?

If you need any help, please don't hesitate to contact us at

service@grundig-auto.com

Description Specification

GRUNDIG: 80 Years of Automotive Engineering & Precision

Since 1945, Grundig has stood for German precision engineering. From the 1951 Autosuper 248 to today, we've evolved from car audio to advanced automotive safety solutions. This heritage drives our TPMS systems: professional-grade components and real-time sensing technology that deliver reliable monitoring for every vehicle.


Ⅰ. Compatible Vehicles

Specifically engineered for multi-axle configurations and high-pressure industrial tires, supporting seamless monitoring for 8 to 12-wheel setups up to 217 PSI (15.0 Bar):

Luxury Class A Diesel Pushers: The ultimate choice for premium, heavy-chassis motorhomes that often feature a tag axle (8 wheels total) and require high-pressure stability for cross-country tours.

Massive 5th Wheel & Toy Haulers: Optimized for triple-axle trailers (e.g., Grand Design Momentum, Keystone Fuzion) and heavy-duty towing combinations that exceed standard tire pressure limits.

Commercial Trucks & Semi-Trailers: Reliable real-time monitoring for commercial fleet vehicles, including dual-rear-wheel (DRW) box trucks and 10-to-12 wheel semi-configurations.

Multi-Axle Boat Trailers: Designed to handle the specialized high-pressure requirements of large boat trailers, ensuring your marine investment is protected against blowouts during long-distance hauls.

Dually Pickups with Gooseneck Trailers: Perfect for heavy-duty setups like a Ford F-450 or RAM 3500 towing large gooseneck trailers, where monitoring the entire 8-to-10 wheel footprint is critical for safety.

Ⅱ. Product Function

【Industrial-Grade Range: Up to 217 PSI】Specifically engineered for the heaviest rigs, the S08 monitors pressures up to 217 PSI (15.0 Bar). It is the ultimate solution for high-load tires (Range G/H/J) found on Class A Diesel Pushers and massive 5th wheels.

【8/12 Wheel Seamless Switching】Versatility for every configuration. Easily switch between 8-wheel and 12-wheel modes to match your specific setup, whether it's a dually pickup towing a large 5th wheel or a full commercial truck with a trailer.

【40-Meter Long Range & Stable Signal】Specifically designed for large vehicles, the system features a powerful transmission range of up to 40 meters (131 feet). Enjoy consistent data syncing with zero packet loss, making it the perfect monitoring solution for long motorhomes, travel trailers, 5th wheels, and towed vehicles.

【High-Precision Core & Zero Latency】Powered by advanced imported chipsets, this system delivers ultra-precise data feedback with zero latency. It monitors tire conditions in real-time with enhanced stability, allowing you to prevent unexpected blowouts and handle emergencies before they happen.

【Intelligent Automatic Start-Stop】Featuring a built-in vibration sensor, the monitor intelligently powers on when it detects vehicle movement and enters a power-saving standby mode when idle. This fully automated system requires no manual operation, significantly extending battery life and ensuring the device is always ready when you are.

【"Four-Proof" Rugged Reliability】Engineered to endure the harshest road conditions. Our sensors feature a Four-Proof design: IP67 Waterproof, Anti-Seismic, Dust-Proof, and Anti-Corrosion. From melting bitumen to freezing mud, these sensors provide 24/7 reliability without failure.

【Recommended Signal Repeater for Extended Lengths】For motorhomes, 5th wheels, or towing setups exceeding 30 feet in total length, a Signal Repeater is highly recommended. RV chassis and dense metal structures can naturally attenuate radio frequency (RF) signals. The repeater is designed to amplify the signal from the rear tires, ensuring stable, uninterrupted 433.92MHz data transmission to your display monitor, preventing intermittent readings. Check the 'With Repeater' option in the dropdown menu if your rig is over 30ft to ensure zero signal dropouts during cross-country trips.

【Up to 1-Year Sensor Battery Life】Engineered for heavy-duty applications, our external sensors reliably monitor extreme tire pressures up to 8.0 Bar while maintaining optimal energy efficiency. Powered by easily replaceable batteries, each sensor delivers up to 12 months of continuous operational life under standard driving conditions. The system display will proactively alert you when a sensor battery runs low.

Ⅲ. Purchase Precautions

Before placing an order, please carefully confirm whether it is compatible with your model.

IMPORTANT: ADAPT ALARM SETTINGS BEFORE USE!
The factory default high-pressure alarm for the S08 is set at 145 PSI (10.0 Bar). While this is designed for heavy-duty use, tire requirements for Class A Motorhomes, 5th Wheels, and Commercial Trucks vary significantly.  
To prevent false alerts or delayed warnings, you MUST reset your high and low pressure alarm limits (Supports up to 217 PSI / 15.0 Bar) according to your specific tire manufacturer standards BEFORE installation. Ensure your safety thresholds are correctly calibrated for a quiet and secure journey across long distances.

ABOUT TPMS

Protect Your Family, Your RV, and Your Vacation. Beyond simple monitoring, this system is your ultimate insurance against the unexpected. A tire blowout in the middle of nowhere can ruin a long-planned holiday and lead to costly repairs. By alerting you to pressure changes instantly, it helps prevent accidents and ensures optimal tire footprint—reducing rolling resistance and saving you significant money on fuel during every long haul. Don't let a flat tire ruin your memories; drive with total peace of mind.

Proactive Safety Monitoring & Fuel Optimization. The primary function of this TPMS is to deliver precise, real-time tire data to prevent potential blowouts before they happen. When low pressure is detected, the proactive alert guides drivers to re-inflate tires promptly. This crucial step not only extends tire life but ensures optimal rolling resistance, effectively lowering overall fuel consumption for heavy-duty setups.

Expandable

The S08 is an industrial-grade system specifically engineered for heavy-duty applications, supporting a professional monitoring range up to 15.0 Bar / 217 PSI. This makes it the ideal safety solution for Class A Diesel Pushers, triple-axle 5th wheels, and commercial semi-trucks.

Absolutely. The system is designed for versatility, allowing you to seamlessly switch between 8-wheel and 12-wheel modes. You can easily adjust the tire quantity in the system settings (Section 3.7) to match your current towing setup.

While our system has a powerful 40-meter (131ft) open-air range, the dense metal frame and aluminum skin of many RVs can block radio signals. If your total setup (Truck + Trailer) is longer than 30 feet, a repeater ensures you never experience "signal dropouts" or delayed readings from your rear tires.

This usually happens because the factory default high-pressure alarm is set at 10.0 Bar (145 PSI). Since heavy-duty tire requirements vary, if your tires are inflated near or above this limit, the system triggers a proactive alert. We recommend resetting your alarm thresholds (Section 3.4 & 3.5) according to your tire manufacturer's standards before installation.

No. The S08 features a built-in smart vibration sensor. The display intelligently wakes up and shows real-time data when it detects vehicle movement and enters a power-saving standby mode when the vehicle has been idle.

The monitor is equipped with a 650mAh high-capacity battery and supports fast charging via a Type-C (DC 5V) port. With an ultra-low operating current of only 15mA, the system provides consistent monitoring for extended periods on a single charge.

IMPORTANT: You must power on the display monitor FIRST before attaching the sensors to your valve stems. This ensures the monitor is ready to capture and sync the signal the moment the sensor is tightened.

This is completely normal. The pre-displayed readings are residual test data from our quality control checks at the factory. Once you install the sensors on your tire valves, the real-time data will automatically overwrite these values.

You can easily change the pressure units by following these steps:
1. In standby mode, press and hold the Center Settings Button for 3 seconds to enter the menu.
2. Short press the Center Button until BAR flashes on the screen.
3. Use the Up/Down Buttons to toggle and select PSI.
4. Press the Center Button once more to confirm and save your setting.