Dwyer Instruments Spray Booth Manometer

Dwyer Instruments: The Trusted Name in Spray Booth Manometers

When it comes to monitoring air pressure and filter condition inside a paint or spray booth, few names carry as much authority as Dwyer Instruments. Founded in 1931, Dwyer has built a reputation that customers associate with quality, reliability, and readily available, cost-effective products. Nowhere is that reputation more evident than in their lineup of spray booth manometers — precision instruments that help technicians maintain safe, efficient, and compliant finishing environments.

Why Spray Booth Manometers Matter

The Dwyer Mark II is widely recognized as the industry standard for crossdraft spray booths. This gauge takes the guesswork out of when to change spray booth filters and is OSHA required for paint spray booths. By continuously tracking differential pressure across intake and exhaust filters, these instruments ensure that airflow stays within the parameters needed for a clean, safe finish — and alert technicians before clogged filters create a fire hazard or contaminate a paint job.

The Series Mark II Molded Plastic Manometer

Dwyer's Series Mark II Molded Manometers are available in inclined and inclined-vertical types. The lineup centers on two key models designed for different use cases:

• Model 25: The curved inclined-vertical tube of the Model 25 provides higher ranges with more easily read increments at low readings, making it excellent for general purpose work.
• Model 40: The Model 40 inclined gauge provides linear calibration and excellent resolution throughout its range, making it ideally suited for air velocity and air filter gauge applications.

Both gauge types are capable of pressure measurements above and below atmospheric, as well as differential pressure measurements. This versatility makes them practical not just for filter monitoring, but for a range of booth airflow diagnostics.

Built for Real-World Use

Construction is simple with a virtually indestructible molded white styrene-acrylonitrile housing, indicating tube and fluid wells, molded ABS knobs and zero adjust plunger, shock-mounted glass level vial, and leak-proof O-ring seals. These manometers are very easy to use — simply fill the reservoir, adjust the fluid level to zero, connect the tubing, and the gauge is ready for operation.

Included with each Mark II manometer are two tubing connectors for 1/8" pipe or sheet metal ducts, two mounting screws, a 1-ounce bottle of indicating fluid, red and green pointer flags, and complete instructions. Everything needed for a straightforward, professional installation is in the box.

Innovation Behind the Instruments

Dwyer is a global leader in designing and manufacturing innovative controls, sensors, and instrumentation solutions, holding over 650 technical patents — a number that grows every year. That deep engineering expertise flows directly into even their most accessible products, like the Mark II, giving spray booth operators confidence that they are using instruments engineered to perform. Beyond manometers, Dwyer's broader pressure-measurement portfolio — including their legendary Magnehelic® and Photohelic® gauges — reflects a company that has spent nearly a century refining the science of differential pressure measurement.

Whether you operate a small automotive refinishing shop or a large industrial paint facility, Dwyer Instruments spray booth manometers deliver the reliable, code-compliant pressure monitoring your operation demands. Browse the full selection of spray booth manometers or explore the complete Dwyer Instruments catalog to find the right solution for your booth.