Dwyer red gage fluid has a 0.826 specific gravity (sp. gr.) to replace fluid in inclined manometers, D-type vertical manometers, and all other Dwyer gauges that use red fluid. The 4 oz. bottle is composed of unbreakable plastic and has a screw top.

Dwyer Instruments manufactures measurement and control instruments, including pressure gauges, flow meters, level instrumentation, temperature instrumentation, and air quality monitors. The company, founded in 1931, is headquartered in Michigan City, IN.