Explore our premium range of 3.5-inch racing gauges, multi-function panels, and high-precision sensor systems.
A global authority in high-performance automotive instrumentation since 1986.
Established in 1986, Ruian DongOu Automobile Meter Factory is a professional enterprise dedicated to the research, development, and production of automotive instrumentation systems. Since its inception, the company has cultivated deep expertise in the industry for many years, building a mature and complete technical system and possessing stable and efficient production capabilities, establishing a strong reputation in the field of automotive instrumentation.
Over the course of 38 years, our factory has evolved into a global leader in performance telemetry and custom dashboard production. By leveraging advanced manufacturing technology, a strict quality control system, and reliable product quality, the company's products are sold to many countries and regions worldwide. With stable product performance, an excellent user experience, and comprehensive after-sales service, we have won widespread recognition and high praise from domestic and international customers, accumulating a good brand reputation in the global automotive instrumentation market.
We manage and distribute two core brands, each with a clear positioning and advantages to match diverse installation and usage needs in different performance environments:
Analyzing B2B procurement patterns, telemetry requirements, and supply-chain logistics.
In the modern motorsport and automotive modification industries, the demand for 3.5-inch racing dashboards is driven by the need for high-density, low-latency data visualization. Tier-1 automotive integrators, professional race teams, specialty vehicle manufacturers, and global tuning networks look for hardware that offers seamless integration, high environmental resilience, and customizable CAN bus communications.
B2B buyers face challenges such as dashboard latency, signal noise in electromagnetic environments, waterproof limitations under extreme racing conditions, and regulatory compliance (like CE, FCC, and RoHS certifications). As a leading supplier and factory, Ruian DongOu provides comprehensive answers to these pain points through bulk supply chain optimization, robust EMI shielding, and tailor-made firmware integrations.
Key Procurement Objectives for Global Distributors:
| Requirement | DongOu Industrial Solution | B2B Advantage |
|---|---|---|
| Low Latency Real-time Data | Customized high-speed microcontrollers with refresh rates < 10ms | Ultra-smooth needle sweeps and digital readouts on LCD |
| Robust Input Protection | Built-in short circuit, reverse polarity, and overvoltage protections | Minimal field failure rates, increasing reliability in harsh track environments |
| OEM/ODM Customization | Tailored branding, custom warning indicators, and variable CAN IDs | High differentiation in localized tuner markets |
Whether supplying rally teams in Scandinavia or aftermarket modification hubs in the United States, our manufacturing facility ensures that each 3.5-inch race dashboard is calibrated to perfection. By combining high-definition transflective LCD screens with robust waterproof sensor kits, we deliver products that stand up to the most demanding motorsport and industrial environments.
Engineered for versatility across professional racing, marine systems, and off-road applications.
Modern automotive integration requires unified systems. Instead of clustering multiple analog gauges (water temp, oil temp, boost pressure, RPM, exhaust gas temp) which increases dashboard clutter and wiring complexity, our 3.5-inch race dashboard displays serve as central telemetry units.
By integrating Bluetooth, OBDII, and direct sensor wire options, our dashboards simplify cabin wiring diagrams. They are utilized not only in sports cars but also in heavy duty marine applications, electric vehicles (EV telemetry monitoring), military vehicles, and off-road buggies where readability and shock resistance are paramount.
Innovating display layouts, multi-protocol integration, and telemetry features.
Expanding direct compatibility with major aftermarket ECUs (Haltech, Motec, Link ECU, AEM) alongside standard J1939 protocols to allow instant plug-and-play installation without external sensor routing.
Developing ultra-bright (1000+ nits) anti-glare IPS displays with zero reflection under direct sunlight, ensuring track drivers maintain complete visibility regardless of steering wheel angle.
Integrating Bluetooth Low Energy (BLE 5.2) and Wi-Fi networks to broadcast vehicle telemetry directly to pit lane crew monitors and cloud analytics dashboards in real-time.
At Ruian DongOu, our technical R&D team and dedicated production workforce are continuously upgrading the firmware behind our 3.5-inch series (such as the SincoTech DO916 and DO904). Over the past 30 years, we have invested heavily in precision manufacturing equipment and professional inspection instruments. This enables us to maintain tight tolerances, conduct rigorous thermal cycling tests, and execute vibration tests simulating extreme rally environments.
With the rapid shift toward Electric Vehicles (EVs), our research team is currently engineering telemetry interfaces capable of showing battery state-of-charge (SoC), thermal management metrics, and regenerative braking values in addition to standard speed and voltage readings.
Combining legacy experience with modern engineering standards to serve global markets.
With over 38 years of dedicated focus on automotive instrumentation, we have built deep industry knowledge and a solid reputation for reliability.
Our two core brands, SincoTech for high-end racing and GragonGauge for diverse modifications, offer a complete and precise solution.
We support customization of your own brand logo, dial layouts, appearance designs, and core sensor integration parameters.
Our products have earned international praise for stable performance, excellent user experience, and comprehensive after-sales support.
Precision assembly lines ensure trace isolation, preventing short circuits under massive G-force vibrations on rally courses.
Every sensor kit undergoes pressure, temperature, and electrical load alignment, assuring precision outputs for critical readouts.
Explore our trending multi-gauge instruments engineered with advanced digital interfaces.
1. Easy installation, plug and play. 2. Suitable for most 12V vehicles with OBDII systems.
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1. Covers 18 kinds of important parameter data. 2. Compact high-brightness digital display.
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1. High-brightness and high-definition OLED display. 2. Auto-adjustable backlight brightness.
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1. Digital Multi Gauge Display. 2. Bluetooth receiver module for simple integration.
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1. Covers 9 key parameters. 2. Features 4 customizable layout display modes.
View DetailHow we ensure secure shipments, strict certification conformity, and localized support.
Our manufacturing practices strictly align with CE directives, FCC Part 15 regulations, and RoHS hazard restriction boundaries. This ensures seamless import customs processing and retail eligibility within EU, US, and UK territories.
All wholesale orders are packed in custom anti-vibration styrofoam enclosures and heavy-grade corrugated cartons to safeguard sensitive LCD panels, glass bezels, and sensor harnesses from damage during shipping.
From detailed wiring pinout schematics and ECU integration assistance to firmware updates and localization tuning support, our factory-backed engineering team supports B2B partners across all time zones.
Providing custom mounting configurations and versatile sensor combinations.
Our modular design philosophy allows our custom dashboards to fit seamlessly in any dashboard cavity or steering column housing. For vehicles where direct dashboard panel mounting is restricted, our specialized gauge pods and mounting brackets offer 360-degree rotation.
Additionally, buyers can mix and match custom 52mm, 60mm, and 80mm gauges alongside our 3.5-inch centralized race dashboards. This configuration allows you to view main parameters on the central display while keeping critical readouts (like oil pressure or turbo boost levels) dedicated to individual, high-contrast analog dials.
Addressing the common technical, commercial, and logistics questions from professional buyers.
We offer comprehensive customization, including brand logo integration on physical casings and start-up screens, custom bezel shapes, and color accents. From a functional standpoint, we can modify warning trigger thresholds, tachometer ranges, and preset sensor profiles. We also adapt firmware to work with proprietary CAN IDs for specialized vehicles.
Our multi-function dashboards (such as DO904 and DO921) utilize a dedicated OBDII transceiver module. By connecting this receiver directly to the vehicle's standard diagnostic port, the dashboard receives engine telemetry via Bluetooth or wired protocols. This translates data such as RPM, coolant temperature, system voltage, and manifold absolute pressure instantly onto the LCD display with low latency.
Yes. Several of our racing models (like the DO908 Custom Rally Dashboard) are engineered with high-integrity sealing. This protection keeps out rain, dust, and mud, making them suitable for open-cockpit race cars, rally vehicles, off-road side-by-sides, and marine environments.
As a factory-direct manufacturer, our standard wholesale MOQ starts at 50 units for basic models, and 100 units for custom OEM projects. Our standard manufacturing lead time ranges from 15 to 30 business days, depending on custom firmware requirements and the scale of the order.
Each product line is verified on specialized testing rigs. We perform high-temperature durability cycles, salt spray fog testing for marine environments, and high-amplitude vibration simulation to isolate potential solder joint failures on the PCB boards. Every sensor kit is calibrated against reference industry instruments to ensure precision readouts.
Browse our catalog of custom-engineered tachometers, sensor kits, and OLED/LCD dashboards.
Direct from Ruian DongOu Automobile Meter Factory.
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