The Dwyer Instruments DR4204M is a high-capacity glass flowmeter designed for reliable fluid flow indication in demanding industrial applications. Featuring a direct reading scale for air or water, this flowmeter provides accurate and easy-to-read measurements. The permanently fused ceramic scale includes integral float guides for optimal float performance, while the reflective plastic background and 1.5x magnification lens reduce eye fatigue and enhance reading precision. Built with a safety blow-out back panel, the DR4204M offers additional protection in overpressure situations.
Key Features & Highlights
- High-capacity design for fluid flow indication at elevated levels
- Direct reading scale for air or water simplifies measurement
- Permanently fused ceramic scale with integral float guides ensures durability and accurate float movement
- Reflective plastic background and 1.5x magnification lens improve readability and reduce eye strain
- Safety blow-out back panel provides extra protection in case of overpressure
- Built to withstand harsh industrial environments
Applications
The Dwyer Instruments DR4204M is suitable for a wide range of industrial applications where reliable flow indication is critical, including water treatment, chemical processing, HVAC systems, and general industrial fluid monitoring.





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