GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts

What this page covers

• Key Product Highlights
• Broad Vehicle Compatibility (US & European Markets)
• Powered by German Infineon Microchip
• Real-Time Safety Alarm Display Formats
• High Pressure Alert
• Low Pressure Alert
• High Temp Alert
• Quick Leak Alert
• Sensor Battery Alert
• Wheel Layout Map
• High Pressure Alert
• Low Pressure Alert
• High Temperature Alert
• Quick Air Leakage Alert
• Sensor Battery Alert
• Sensor Fault Alert
• Why TPMS Matters
• Important Installation Precautions
• Technical Specifications
• Frequently Asked Questions
• Compare TPMS Specifications
• GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts product imagery.
• Current public product facts and purchase options.

Key Product Highlights

• Independent Axle Alarm Settings: Customize pressure alarm thresholds independently for each axle, allowing you to set tailored, precise pressure alert values for both your main vehicle and trailer.
• Large Backlit LCD Display: High-definition display panel with adjustable backlight ensures clear, effortless reading under intense sunlight or dark night driving conditions.
• Dual Power & 1800 mAh Battery: High-efficiency solar charging combined with a Type-C USB port and a built-in 1800 mAh rechargeable battery for continuous power supply.
• Real-Time Safety Alarms: Instant visual and audible alerts for High Pressure, Low Pressure, High Temperature, Fast Air Leakage, Sensor Low Battery, and Sensor Fault.
• German Infineon Microchip Engineering: Powered by an advanced Infineon processor for maximum RF wireless stability, rapid signal transmission, and pinpoint accuracy (±1.5 PSI / ±3°C).
• Supports 6 to 36 Wheel Monitoring: Multi-axle expandability seamlessly monitors from 6 up to 36 tires simultaneously with 0-200 PSI range. Flexible unit conversion available (PSI, BAR, ℉, ℃).
• Digital Tire Position Exchange: Easily swap tire positions directly on the display menu after tire rotations without having to physically unscrew and reinstall sensors.
• IP67 Waterproof & Extreme Durability: Heavy-duty TS external sensors built for harsh outdoor road environments with user-replaceable CR1632 batteries (up to 2-year lifespan).
• Heavy-Duty US & European Compatibility: Designed for Class A/B/C RVs, Fifth Wheels, Travel Trailers, Dually Trucks, European Campervans, and Commercial Multi-Axle Rigs.

Broad Vehicle Compatibility (US & European Markets)

Specially engineered for American and European long-haul RVs, heavy-duty tow rigs, and multi-axle commercial fleets requiring continuous high-pressure stability:

• US Motorhomes (Class A, B & C): Fully supports large Class A pushers, Class C rigs, and European integrated motorhomes on Fiat Ducato, Mercedes Sprinter, or Ford chassis.
• Fifth-Wheel Trailers & Toy Haulers: Prevents dangerous highway blowouts on heavy-duty American Fifth Wheels and multi-axle Travel Trailers during long interstate hauls or European autobahn trips.
• Dually Pickup Trucks & Tow Vehicles: Seamlessly monitors multi-wheel setups on heavy-duty dually pickups (Ford Super Duty, RAM 3500, Chevrolet Silverado HD) and tow rigs.
• European Campervans & Van Conversions: Optimized for popular European campervan conversions including VW Crafter/Transporter, Mercedes Sprinter, Fiat Ducato, and Renault Master.
• Commercial Transports & 18-Wheel Rigs: Built for commercial semi-trucks, 18-wheelers, heavy logistics trailers, and multi-axle transport configurations supporting up to 36 wheel positions.

Powered by German Infineon Microchip

At the heart of the GRUNDIG 550S is the industry-leading German Infineon Microchip . Built with precise German engineering standards, it operates on a dedicated 433.92MHz frequency to ensure rapid signal refresh rates, exceptional anti-interference stability across long trailer lengths, and ultra-low power consumption for extended battery lifespan.

Real-Time Safety Alarm Display Formats

The 550S system adjusts its display formatting depending on your vehicle axle layout, giving you real-time visual and audible warnings for maximum safety on the road.

1. Standard Vehicle Display Alarms (6 - 8 Wheels)

High Pressure Alert

Triggers when tire pressure rises above threshold, preventing dangerous blowouts.

Low Pressure Alert

Warns instantly when pressure drops below safe limits to protect rims and fuel efficiency.

High Temp Alert

Alerts you when internal tire heat exceeds safe limits, preventing rubber tread separation.

Quick Leak Alert

Detects rapid air loss in seconds due to punctures, giving you time to pull over safely.

Sensor Battery Alert

Flashes a low battery icon on the exact wheel position when the sensor battery drops below 2.2V.

2. Commercial & Heavy-Duty Multi-Axle Display Alarms (22 - 36 Wheels)

Wheel Layout Map

Multi-axle layout diagram clearly identifies the exact tire position across 22 to 36 wheel configurations.

High Pressure Alert

Flashes specific tire number and real-time pressure when exceeding preset maximum limits.

Low Pressure Alert

Triggers visual and audible alarms when pressure falls below safety thresholds on multi-axle setups.

High Temperature Alert

Displays exact tire location and temperature reading when thermal thresholds are breached.

Quick Air Leakage Alert

Urgent alarm sequence signals rapid pressure loss on the exact wheel position.

Sensor Battery Alert

Indicates when a specific wheel's CR1632 coin cell battery needs replacement.

Sensor Fault Alert

Alerts immediately if a sensor experiences signal loss or operational failure on the trailer.

Why TPMS Matters

Protect Your Family, Your RV, and Your Journey. Beyond simple monitoring, this system is your ultimate insurance against the unexpected. A tire blowout on a remote interstate or European highway can ruin a long-planned road trip and lead to costly repairs. By alerting you to pressure and temperature changes instantly, it helps prevent serious accidents and ensures optimal tire footprint—reducing rolling resistance and saving fuel on every long haul.

Important Installation Precautions

• Power On the Monitor First: Always turn on the display monitor before installing external sensors on your tire valves. This allows the monitor to receive initial pressure readings in real-time as sensors are attached.
• Valve Stem Material Recommendation: Because external sensors add slight weight to the valve tip, we highly recommend using metal / aluminum alloy valve stems rather than rubber ones to prevent dynamic flex at highway speeds.
• Perform Air Leakage Check: After screwing on external sensors, spray soapy water around the valve nozzle to confirm there are no air leaks prior to driving.
• Anti-Theft Lock Nuts: Remember to thread the anti-theft hex nut onto the valve stem first. After screwing on the TS sensor, use the included wrench to turn the nut counter-clockwise tight against the sensor base.
• Signal Booster (Repeater) Setup: For 22-wheel/36-wheel setups or vehicles longer than 10 meters, install the repeater near the middle of the vehicle/trailer. Connect red to positive (+), black to negative (-). A flashing red LED confirms active operation.
• Avoid Liquid Tire Sealants: Do not use liquid tire sealants (chemical repair fluids), as the liquid can clog the sensor pressure detection port and permanently damage internal electronics.

Technical Specifications

Monitoring Capacity Supports 6 to 36 Wheel Configurations

Pressure Testing Range 0 to 200 PSI (0 - 13.8 BAR)

Pressure Accuracy ±1.5 PSI (±0.1 BAR)

Temperature Accuracy ±3°C

Operating Temperature -40°C to 120°C (-40°F to 248°F)

System Maximum Temperature Rating Up to 120°C (248°F)

Transmission Frequency 433.92 MHz RF Wireless

Sensor Model & Rating TS External Sensor | IP67 Waterproof & Dustproof

Sensor Battery Model & Life CR1632 (User-replaceable coin cell), ~2 Years Lifespan

Sensor Dimensions & Weight Height: 26mm | Diameter: 28mm | Weight: 18g

Display Monitor Battery 1800 mAh Heat-Resistant Lithium Battery (Solar Panel + Type-C USB Charging)

Transmission Distance (without Signal Booster) Approx. 5m / 16.4ft (with cabin furniture & layout obstructions)

Display Unit Dimensions 3.94" × 2.17" × 0.83" (100 × 55 × 21 mm)

Frequently Asked Questions

Q1: How do I choose between 6/8/22/36 wheel configurations?

Choose based on your vehicle’s total wheel count: 6 wheels for small campervans/single-axle trailers, 8 wheels for dual-axle RVs, 22 wheels for heavy-duty trucks with trailer, 36 wheels for commercial multi-axle rigs. All configurations use the same 200 PSI external sensors and support solar + Type-C charging.

Q2: Will the display show data when my vehicle is parked?

The sensors only transmit when they detect a pressure change greater than 1 PSI. When the vehicle is stationary, the monitor automatically enters sleep mode after 3-5 minutes and the displayed values may freeze. This is normal behavior. The display will refresh once the vehicle is started and the sensors detect vibration or pressure change. If you need real-time readings while parked, briefly press any button to wake the monitor.

Q3: Can I switch units between PSI/BAR and °C/°F?

Yes. The monitor supports PSI, BAR, °C, and °F units. To switch: long-press the SET button to enter the parameter setting menu, navigate to “Unit” using the +/- keys, then press SET to toggle between BAR/PSI and °C/°F. Hold SET to save and exit.

Q4: How many wheel positions can this TPMS support and how do I add a new sensor?

The 550S supports 6, 8, 22, or 36 wheel positions depending on your purchased configuration. To pair a new sensor: (1) Power on the monitor first; (2) Long-press the “Matching” button to enter pairing mode; (3) Hold the corresponding “+/-” key to select the wheel position; (4) Screw on the external sensor to the tire valve - it will transmit a unique ID code; (5) When the ID appears on screen, press SET to confirm. The pairing is complete when the tire position lights up.

Q5: How do I rotate tires or change a tire position on the display?

The 550S features digital “Tire Position Exchange” - you don’t need to unmount the sensors. After physically rotating tires: (1) Long-press SET to enter settings; (2) Navigate to “Interchange tire setting”; (3) Select the source position number and press SET; (4) Use +/- to choose the target position; (5) Press SET to confirm and HOLD to save. You can swap multiple positions before saving.

Q6: What are the default alarm thresholds, and what are the maximum/minimum values I can set?

Default values are: 6/8-wheel version: High 116 PSI / Low 58 PSI / Temp 65°C (149°F); 36-wheel version: High 175 PSI / Low 100 PSI / Temp 70°C (158°F). Maximum settable pressure: 199 PSI (13.7 BAR). Minimum settable pressure: user-defined. We recommend setting thresholds based on the tire manufacturer’s recommended cold inflation pressure (typically 80-110 PSI for RVs, 100-120 PSI for commercial trucks).

Q7: What do the different alarm types mean?

The 550S system provides comprehensive safety alarms: (1) High Pressure - flashes high pressure indicator with audio beep; (2) Low Pressure - triggers low pressure warning; (3) High Temperature - alerts when thermal limits are exceeded; (4) Slow Leak - alerts during gradual pressure loss; (5) Fast Leak - urgent pattern for rapid air loss; (6) Sensor Low Battery - flashes when sensor battery drops below 2.2V; (7) Sensor Fault - indicates signal loss or sensor failure. Press any button to silence alarms.

Q8: What should I do if a tire shows “no data” or “—”?

First, drive the vehicle for a few minutes - the sensor will wake up and re-transmit when it detects pressure change or vibration. If the issue persists: (1) Check the sensor battery (replace CR1632 if low); (2) Verify the sensor is properly tightened on the valve; (3) For long trailers, ensure the signal booster is installed near the middle of the vehicle; (4) As a last resort, unscrew the sensor, wait 1 minute, and reinstall to force re-pairing.

Q9: How long do the sensor batteries last, and how do I replace them?

Each sensor uses a standard CR1632 coin cell battery with approximately 2-year lifespan under normal use. To replace: (1) Unscrew the sensor from the tire valve; (2) Use the included battery wrench to unscrew the sensor housing; (3) Remove the old CR1632 battery; (4) Insert a new CR1632 with the positive (+) side facing up; (5) Reassemble and reinstall. The monitor will alert you when a sensor’s voltage drops below 2.2V.

Q10: Is the monitor safe to leave on the dashboard in extreme heat or cold?

The 550S uses a heat-resistant 1800 mAh lithium battery designed for automotive environments. However, for optimal performance: (1) In summer, mount the display in a shaded area or use the windshield bracket to avoid direct sunlight; (2) Below -20°C, the display refresh will slow down but resumes normal operation at warmer temperatures; (3) In extreme heat (>65°C), the display will automatically enter protection mode and resume when temperatures normalize.

Q11: What is the signal booster, and do I need it?

The signal booster (repeater) strengthens the 433.92 MHz wireless signal from sensors to the monitor. It is included with 22-wheel and 36-wheel configurations, and optional for 6/8-wheel setups. We strongly recommend it for: (1) Vehicles longer than 10 meters; (2) RVs with metal-bodied trailers; (3) Commercial rigs with multiple axles. Installation: connect the booster’s red wire to ACC power and black wire to ground, mount near the center of the vehicle. The booster’s LED should flash red during normal operation.

Q12: What does the warranty cover, and how do I get support?

All GRUNDIG 550S systems come with a 2-year manufacturer warranty covering defects in materials and workmanship under normal use. The warranty does NOT cover: (1) Damage from improper installation or self-disassembly; (2) Normal wear of CR1632 sensor batteries; (3) Damage from accidents, water immersion beyond IP67 rating, or use outside specified operating ranges. For support, please contact your local distributor with your order number and a description of the issue.

Compare TPMS Specifications

Compare Models HIGHEST PRESSURE S08 Learn More MAX EXPANSION 550S Learn More ENTRY LEVEL RV01 Learn More 6-WHEEL SPECIALIST S04 Learn More

Max Pressure 217 PSI (15.0 BAR) 200 PSI (13.8 BAR) 116 PSI (8.0 BAR) 217 PSI (15.0 BAR)

Supported Wheels 8 - 12 Wheels 6 - 36 Wheels 4 - 8 Wheels Up to 6 Wheels

Best Suited For Heavy Duty & High-PSI Trailers Commercial Fleets & Multi-Axle Standard RVs & Campers 6-Wheel Trucks & RVs

Swipe for more specs

Compare Models Max Pressure Supported Wheels Best Suited For Action

HIGHEST PRESSURE S08 217 PSI (15.0 BAR) 8 - 12 Wheels Heavy Duty & High-PSI Trailers Learn More

MAX EXPANSION 550S 200 PSI (13.8 BAR) 6 - 36 Wheels Commercial Fleets & Multi-Axle Learn More

ENTRY LEVEL RV01 116 PSI (8.0 BAR) 4 - 8 Wheels Standard RVs & Campers Learn More

6-WHEEL SPECIALIST S04 217 PSI (15.0 BAR) Up to 6 Wheels 6-Wheel Trucks & RVs Learn More

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Frequently Asked Questions

What is the price of GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts?

GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts has a starting price of USD 45.00. 6 External Sensors-200 PSI Version: USD 249.00. 6 External Sensors-200 PSI Version+Signal Booster: USD 269.00. 8 External Sensors-200 PSI Version: USD 299.00. 8 External Sensors-200 PSI Version+Signal Booster: USD 319.00. 10 External Sensors-200 PSI Version+Signal Booster: USD 389.00. 12 External Sensors-200 PSI Version+Signal Booster: USD 429.00. 14 External Sensors-200 PSI Version+Signal Booster: USD 479.00. 16 External Sensors-200 PSI Version+Signal Booster: USD 539.00. 22 External Sensors-200 PSI Version+Signal Booster: USD 699.00. 36 External Sensors-200 PSI Version+2 Signal Boosters: USD 1099.00. Signal Booster (Only for 550S and 860 TPMS): USD 45.00. 4 Internal Sensors-200 PSI Version: USD 209.00.

Can I purchase GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts?

6 External Sensors-200 PSI Version is available to purchase. 6 External Sensors-200 PSI Version+Signal Booster is available to purchase. 8 External Sensors-200 PSI Version is available to purchase. 8 External Sensors-200 PSI Version+Signal Booster is available to purchase. 10 External Sensors-200 PSI Version+Signal Booster is available to purchase. 12 External Sensors-200 PSI Version+Signal Booster is available to purchase. 14 External Sensors-200 PSI Version+Signal Booster is available to purchase. 16 External Sensors-200 PSI Version+Signal Booster is available to purchase. 22 External Sensors-200 PSI Version+Signal Booster is available to purchase. 36 External Sensors-200 PSI Version+2 Signal Boosters is available to purchase. Signal Booster (Only for 550S and 860 TPMS) is available to purchase. 4 Internal Sensors-200 PSI Version is available to purchase.

What variants are available for GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts?

The public product response lists 12 variants: 6 External Sensors-200 PSI Version; 6 External Sensors-200 PSI Version+Signal Booster; 8 External Sensors-200 PSI Version; 8 External Sensors-200 PSI Version+Signal Booster; 10 External Sensors-200 PSI Version+Signal Booster; 12 External Sensors-200 PSI Version+Signal Booster; 14 External Sensors-200 PSI Version+Signal Booster; 16 External Sensors-200 PSI Version+Signal Booster; 22 External Sensors-200 PSI Version+Signal Booster; 36 External Sensors-200 PSI Version+2 Signal Boosters; Signal Booster (Only for 550S and 860 TPMS); 4 Internal Sensors-200 PSI Version.

Who makes GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts?

Grundig-auto is the listed brand of GRUNDIG 550S Solar Powered TPMS for RVs & Trucks, 6–36 Wheel Monitoring, 200 PSI, Independent Axle Pressure Alerts Setup, Real-Time Tire Pressure & Temp Alerts.