Low-Pressure Capsule Gauges

Discover our precise and sensitive low-pressure capsule gauges—ideal for measuring very low pressures or vacuum in gaseous environments. Equipped with a capsule (bellows-style) sensing element, they excel in filter, duct, and environmental monitoring where accuracy at low pressure is essential.

How They Work & Media Compatibility

• Utilise a delicate capsule (paired diaphragms) that expands/contracts with minute pressure changes for precise readings under low pressure.
• Designed exclusively for dry, non-liquid gases—liquid media can distort readings due to hydrostatic effects.
• Available in brass-wetted or all-stainless configurations to suit non-corrosive or aggressive media.

Dial Sizes & Mounting Options

• Offered in popular panel sizes: 63 mm, 80 mm, and 100 mm—compact yet legible.
• Available in bottom entry, back entry, and panel-mount formats—configured to your installation preference.

Typical Ranges & Precision

• Measurements start from vacuum/near-zero and extend up to several inches of water column or mbar—ideal for delicate control tasks.
• Excellent sensitivity and repeatability make these gauges perfect for low-flow systems, filter status, and HVAC diagnostics.

Applications & Industries

• Used in filter monitoring, duct and airflow systems, vacuum pump control, and environmental or clean-room instrumentation.
• Common in HVAC, ventilation, medical suction devices, clean-room pressure control, and routine maintenance diagnostics.

Our low-pressure capsule gauges offer exceptional sensitivity and accuracy for dry gas or vacuum monitoring tasks. Ideal when measuring in delicate pressure environments, they deliver trusted performance day after day.

Contact GNW Instrumentation for help selecting the correct capsule gauge—including choices of materials, pressure ranges, mounting types, or calibration options.