Providing high-precision data display, reliable warning systems, and automotive gauge customization solutions since 1986. Engineered for racing performance and structural modification aesthetics.
Established in 1986, Ruian DongOu Automobile Meter Factory has positioned itself as a key developer and manufacturer of automotive instrumentation systems. Over the course of nearly four decades, the factory has built technical systems and production lines designed to meet the demands of modern automotive performance monitoring.
Our operation integrates research and development with manufacturing workflows. We supply instrumentation that translates complex mechanical measurements into reliable, real-time visual readouts for drivers, engineering teams, and system tuners. From basic analog displays to integrated multi-function digital dashboards, DongOu products are calibrated to operate under demanding environmental and mechanical conditions.
We maintain a dedicated technical team, standard quality control steps, and precision calibration setups. Our production facilities are equipped to manage custom OEM and ODM demands, providing functional compatibility for a wide range of automotive electrical layouts. With a footprint in both street modifications and competitive racing markets, we continue to develop instrumentation solutions based on industry feedback and technical standards.
To support varying technical needs and layout preferences, Ruian DongOu Automobile Meter Factory offers two core brands, each configured for distinct automotive monitoring roles.
SincoTech represents our high-end instrument line, co-developed with an Australian automotive technology company. Engineered for competitive environments, SincoTech systems focus on tracking multiple engine parameters on single, unified LCD displays. By reducing layout clutter, they allow drivers to monitor key variables during high-performance runs.
Equipped with microprocessors and custom sensor suites, SincoTech units display data points like engine RPM, water temperature, oil temperature, oil pressure, exhaust gas temperature (EGT), boost level, and air-fuel ratio. Custom warning lights and threshold buzzers alert drivers before parameters exceed safe limits. The system uses robust wiring harnesses and waterproof sensor connections to handle track vibrations and high thermal exposure.
GragonGauge is our dedicated brand for aftermarket modifications, offering individual monitoring units for specific parameters. This brand is built for tuners and vehicle owners who need targeted data visualization inside the cabin. GragonGauge features classic dial sweeps combined with digital readouts for clarity under varied lighting conditions.
The product catalog spans key parameters including tachometers, boost gauges, vacuum gauges, water temp gauges, oil temp gauges, oil pressure gauges, voltmeters, air-fuel ratio gauges, and exhaust temperature gauges. Units are designed to fit standard dashboard pods or mounting pillars, offering compatibility with diverse gauge mounts, brackets, and custom configurations. This line supports multiple backlighting profiles to match vehicle interiors.
To support standard mounting structures, our gauges are built to precise industry-standard outer shell diameters, matching standard housing pods, A-pillar pods, and custom dashboard layouts:
Best Seller
Designed for tight dash configurations, this 52mm dual-function instrument monitors temperature and pressure ranges, delivering real-time readings through digital LED digits and colored hazard indicators.
High Performance
A comprehensive racing display that processes and presents 9 key parameters. Features 4 distinct layout modes, adjustable warning thresholds, and high-visibility LED shift indicators.
OBDII Bluetooth
Enables plug-and-play installation via a standard OBDII port or Bluetooth interface. Suitable for 12V cars, extracting diagnostic data directly from the ECU for accurate displays.
Complete Kit
A standalone multi-function display kit that bypasses the factory ECU. Connects directly to dedicated sending units for accurate, track-ready data collection.
Standard Fit
Designed for reliable tank level tracking, this gauge includes an adjustable fuel float sensor compatible with varied tank depths. Ideal for customized builds and off-road vehicles.
Dual Readout
Allows concurrent tracking of engine coolant temperature and lubricating oil pressure within a single 52mm mounting profile, optimizing dashboard space.
Primary Gauge
A large 5-inch dial-face tachometer integrating three sub-gauges for water temp, oil temp, and oil pressure. Outfitted with an external high-intensity shift light.
7 Colors Backlight
Offers selectable 7-color LED backlighting. Available in separate units for boost levels, voltage, air-fuel ratios, and exhaust gas temperatures.
Multi-Function
Tracks boost pressure alongside engine RPM in one dial. Uses stepper motors for stable needle sweep, with adjustable threshold alerts.
To reduce clutter on automotive dashboards, Ruian DongOu Factory offers multi-function digital dashboards that display several parameters in a single unit. These units centralize data collection to streamline monitoring during operation.
An integrated instrumentation panel displaying up to 18 distinct engine parameters on a 3.5-inch LCD screen. Suitable for compact cabins and setups with limited space.
Features a high-brightness OLED display with automated dimming for visibility under varying ambient light. Tracks 10 critical parameters in real time.
Designed for modern performance vehicles, the DO903 links with external OBDII senders or dedicated sensors to aggregate diagnostic codes onto a single screen.
At Ruian DongOu Automobile Meter Factory, product reliability is managed through established quality control steps and testing setups. We verify that each gauge maintains structural integrity and reads accurately before it leaves the factory.
Modern gauges require precise dial indicators. We utilize micro-stepping motors in our analog displays to ensure stable, jitter-free needle movement. Each driver board is programmed and calibrated against pressure and temperature standards to ensure dial indications match raw sensor signals.
Our quality control workflow includes high-voltage tests, signal-to-noise ratio checks for sensor lines, and prolonged diagnostic stress tests designed to isolate and eliminate premature stepper motor failures.
Automotive engine compartments and vehicle dashboards are exposed to heat cycling and high vibrational loads. Our testing protocol subjects production samples to thermal cycling chambers (ranging from -20°C to +80°C) and multi-axis shake tables.
This process checks mechanical joints, circuit boards, display modules, and soldering connections for reliability under sustained physical stress, ensuring consistent performance in both cold starts and high-heat environments.
Because engine temperature, fuel level, and oil pressure sensors are installed in harsh environments, they must resist moisture and chemical exposure. We check all sensor units for seal integrity using pressurized fluid tests.
Our quality control steps verify that threaded connections, internal sensing elements, and harness couplers maintain their seals under vibration and exposure to oils, water, and fuel.
Our instrumentation systems are designed to fit different vehicle platforms. They can be installed as standalone units, integrated into multi-gauge clusters, or linked with vehicle computer networks.
Vehicle builders can group individual monitoring units (such as boost, oil temp, and exhaust temperature) onto custom mounting plates. This modular design helps track key parameters on a single panel.
For racing vehicles, our LCD dashboards centralize diagnostic and sensor readouts on one screen, reducing driver distraction and simplifying electrical wiring.
Using our line of mounting brackets, dashboard pods, and pillar trims, tuners can mount gauges at different angles to improve readability in custom cabins.
With 38 years in the automotive industry, we work to provide reliable products, technical support, and flexible customization services to distributors and automotive clients globally.
Since 1986, we have manufactured instrument systems for performance applications. Our facility is equipped to handle complex technical projects and long-term production requirements.
We support custom brand logos on dials and start screens, and we adjust measurement ranges, dial colors, backlighting modes, and sensor threads to meet local standards.
Our products are exported to regional markets worldwide. We maintain stable production schedules and provide support services to help distributors manage inventory.
We manufacture and export automotive meters to support distributors and tuners in several key regions. Over our 38-year history, we have established supply channels to deliver products to diverse international markets.
Whether you manage a specialized modification shop, distribute aftermarket automotive parts, or manufacture custom vehicles, we provide components that integrate into your local production or sales pipeline. Our OEM/ODM capabilities are configured to support brand development in global markets.
Contact our engineering team to discuss custom faceplate branding, scale adjustments, sensor thread configurations, or volume pricing plans.
Dongou