Manometers

Manometers measure differential, gauge, or absolute pressure, commonly used to verify airflow, duct pressure, and system performance in HVAC, industrial, and laboratory applications. We stock digital and analog (U-tube and inclined) manometers for field and bench use.

Digital vs. Analog Manometers

Digital manometers provide precise numeric readouts, data logging, and often built-in unit conversion, making them the standard choice for HVAC balancing, filter monitoring, and documented testing. Analog U-tube and inclined manometers use a liquid column to indicate pressure and remain a reliable, low-cost option for basic differential pressure checks without the need for batteries or calibration drift concerns.

Pressure Range & Units

Ranges in this category are typically well suited to low-pressure applications, from a fraction of an inch of water column up to several psi, covering most HVAC and process differential pressure needs. Most digital models support multiple units (inH2O, Pa, mbar, psi) selectable on the device.

Single vs. Dual Port

Single-port manometers measure gauge pressure relative to atmosphere, while dual-port (differential) manometers measure the pressure difference between two points, such as across a filter or damper — the more common configuration for HVAC and process monitoring work.

Common Applications

• HVAC airflow and duct pressure testing
• Filter and damper differential pressure monitoring
• Cleanroom and pressurization verification
• Gas line and pipeline leak testing
• Combustion and draft pressure testing

Not sure which manometer fits your application? Contact our team — we can help match range, port configuration, and features to your specific requirement.

Frequently Asked Questions

Should I choose a digital or analog manometer?

Digital manometers are recommended when precise readings, data logging, or documentation are needed. Analog U-tube manometers remain a reliable, low-maintenance option for basic pressure checks.

What’s the difference between single-port and dual-port manometers?

Single-port manometers measure gauge pressure relative to atmospheric pressure. Dual-port (differential) manometers measure the pressure difference between two points, such as across a filter, which is the more common measurement in HVAC applications.

What pressure range do I need for HVAC work?

Most HVAC duct and filter pressure measurements fall within 0-10 inH2O, though higher ranges may be needed for combustion or industrial process applications.

Do you provide calibration certificates for manometers?

Yes, select models are available with a NIST-traceable calibration certificate at the time of purchase. Look for the certification filter above or contact us for a custom calibration request.