Differential Magnehelic Gauge

A Magnehelic® Differential Pressure Gauge is a mechanical differential-pressure instrument used for measuring low positive, negative, or differential pressure, especially in air, HVAC, filters, ducts, blowers and clean-room applications. A typical Series 2000 unit has a 4“ dial, ±2% FS accuracy, and separate high/low pressure connections.Parameter Specification

Type Differential Pressure Magnehelic Gauge

Dial Size 4” (100/101.6 mm)

Measuring Principle Magnetic movement with diaphragm

Pressure Type Differential / Positive / Negative

Range As required, e.g. 0–0.5“ WC, 0–1”, 0–2“, 0–5”, 0–10“ WC

Accuracy ±2% of Full Scale

Connection 1/8” Female NPT, High & Low pressure

Pressure Taps Duplicate side and rear connections

Case Die-cast Aluminium

Bezel Aluminium

Window Acrylic / clear plastic

Diaphragm Suitable elastomer, depending on application

Mounting Surface / Flush Panel Mounting

Orientation Vertical diaphragm

Enclosure IP67 for current Series 2000 configuration

Temperature Range Approx. -7 to +60°C

Pressure Limit Standard up to 15 psi; MP/HP options available

Overpressure Protection Relief plug on standard models

Scale Inches WC / Pa / mm WC / kPa as required

Application Air filters, AHU, HVAC, ducts, fans, blowers, clean rooms