85mm Suppliers & Supplier

Leading the Instrument Industry for Decades

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.

With an unwavering focus on reliability, stability, and integration, our products offer optimal performance in challenging environments. Through strategic alliances and joint R&D efforts, we have created custom instrumentation lineups tailored for commercial fleets, high-performance racing platforms, and recreational modifications.

Strategic Dual-Brand Portfolio

The company boasts a comprehensive and diverse product portfolio, with two core brands, each with a clear positioning and advantages:

• SincoTech: A high-end instrument panel brand jointly developed with a leading Australian company. This brand focuses on the racing sector. Thanks to its stringent R&D standards and strict production control, its product performance and quality reach the absolute high end of the industry, fully meeting the high-precision data requirements of extreme racing scenarios.
• GragonGauge: A brand specializing in various modified instruments, covering core instrument types such as tachometers, boost gauges, vacuum gauges, water temperature gauges, oil temperature gauges, oil pressure gauges, voltmeters, air-fuel ratio gauges, and exhaust temperature gauges, while also providing warning lights and mounting brackets.

In terms of product dimensions, our catalogue covers all globally demanded specifications including 52mm (2 inches), 60mm (2.36 inches), and 85mm (3.75 inches / 3-3/8 inches), accurately matching diverse installation and usage needs in different vehicle modification scenarios.

Marine environments require gauges that can withstand constant moisture and salt air corrosion. Our 85mm marine speedometers and tachometers are constructed with marine-grade 316 stainless steel bezels, IP67 waterproof housings, and anti-fogging curved glass lenses. By utilizing high-precision stepper motors and active external GPS antennas, boat builders receive drift-free speed-over-ground (SOG) data without having to run transducer cables through the hull.

Earthmoving equipment, agricultural machinery, and off-road utility vehicles run on rough terrain where severe vibrations destroy standard needle pivots. Ruian DongOu's 85mm instrumentation relies on heavy-duty stepper motors that feature a high holding torque. This ensures the needle remains steady, responsive, and completely immune to structural shocks and vibrations.