Dwyer 605-30C Magnehelic Differential Pressure Indicating Transmitter 0-30" WC

Dwyer 605-30C Magnehelic Differential Pressure Indicating Transmitter 0-30" WC

The Dwyer 605-30C is a Magnehelic differential pressure indicating transmitter with a 0-30 inch water column (WC) range. It combines a Magnehelic analog dial gauge with a built-in transmitter output, allowing simultaneous local visual readout and remote signal transmission in a single instrument. The front panel features a clean analog scale marked in inches of water, a red pointer, and Span and Zero adjustment knobs for field calibration.

Specifications & What's Included

• Manufacturer: Dwyer Instruments, Inc. — Michigan City, IN, USA
• Model / Cat. No.: 605-30C
• Series: 605 Magnehelic Indicating Transmitter
• Measurement range: 0-30 inches of water column (WC)
• Max pressure: 11 PSIG (75.8 kPa)
• Max temperature: 120°F (48°C)
• Min temperature: 20°F (-6°C)
• Scale units: Inches of Water
• Output: Analog transmitter signal with local indicating gauge display
• Front panel controls: Span adjustment knob, Zero adjustment knob, Pointer Zero
• Rear: Screw terminal block for signal wiring (leads visible in photos)
• Date code: N09W-S (visible on dial face label)
• Certifications: CE
• Gauge only — no mounting hardware or signal cables included

Applications

The Dwyer Magnehelic series is one of the most widely used differential pressure gauge lines in HVAC, building automation, and light industrial applications. The 605 series adds a transmitter output to the classic Magnehelic design, making it suitable for applications where both a local visual reading and a remote 4-20 mA or similar signal are needed at the same point. Typical uses include monitoring pressure drop across air filters and coils in air handling units, measuring duct static pressure in ventilation systems, monitoring cleanroom or laboratory pressurization relative to adjacent spaces, and verifying flow conditions in low-pressure airflow systems. The 0-30 inch WC range makes the 605-30C appropriate for moderate-differential HVAC and process air applications. These instruments are standard equipment in commercial building mechanical rooms, industrial ventilation systems, and process environments where a reliable, readable local gauge plus a control-system signal output are both required.