Digital Gas Manometers

Manometers & Differential Pressure Gauges for HVAC/R

A manometer measures pressure — most commonly gas pressure, duct static pressure and differential pressure (pressure drop across filters, coils, heat exchangers and dampers). If you’re chasing airflow issues, nuisance pressure-switch faults, combustion setup checks, or you just want cleaner commissioning notes, a decent manometer pays for itself in fewer call-backs.

This collection includes digital manometers, micromanometers for low-pressure work, and Bluetooth/wireless manometer probes commonly used with Fieldpiece and Testo ecosystems. (Use the filters to narrow by brand and tool style.)

Prefer to browse all diagnostic gear? Start at Test & Measurement Tools, then pair your pressure readings with thermometers, hygrometers, and data loggers where needed.

Choose the right manometer (fast, trade-focused)

1) What are you measuring?

• Duct static pressure (airflow diagnostics): look for stable low-range readings and good resolution in Pa / inWC.
• Differential pressure (ΔP) across filters/coils: a 2-port manometer is the quickest way to see pressure drop.
• Gas inlet / manifold pressure: choose a meter suited to gas appliance work and the units you prefer (kPa / mbar / inWC). Always follow OEM procedures.
• Pressure switches & draft proving: a manometer with a built-in pump can speed up proving/cali checks where appropriate.

2) Single-port vs 2-port

• Single-port: simple spot checks (one pressure point).
• 2-port (P1/P2 + ΔP): best for real HVAC troubleshooting — you can read supply/return, or see pressure drop across a component without maths.

3) Range & resolution (don’t overbuy the wrong spec)

For duct work, resolution matters more than huge max range. For gas work, pick a meter that reads cleanly in the ranges your OEM procedures call for. If you routinely diagnose low-pressure airflow problems (tight filters, undersized returns, dirty coils), a micromanometer can be the better tool.

4) Logging, Min/Max, Hold & Bluetooth

Logging and Bluetooth are worth it when you need trending (e.g. filter loading, plant drift) or you want clean job notes. If you’re already running an app ecosystem, match the tool to your platform so the data actually gets used.

Common HVAC/R use cases (how tradies actually use them)

Static pressure (ducted systems)

• Confirm supply/return static is within the equipment’s specified limits
• Pinpoint restrictions: filter, coil, return grille, undersized duct runs
• Document “before/after” when cleaning coils or changing filtration

Differential pressure (ΔP) troubleshooting

• Pressure drop across filters and coils (dirty vs clean)
• Dampers and zoning diagnostics
• Proving fan performance without guessing

Gas pressure checks (where you’re licensed)

• Confirm appliance inlet/manifold pressure using the OEM procedure
• Verify regulators and diagnose supply issues (only within your scope)

Important: Gasfitting and gas appliance servicing is regulated in Australia and typically requires appropriate licensing. (For example, NSW states you need a licence/certificate before doing gasfitting work.) Use qualified, licensed trades for gas work.

What to add to the cart (pressure readings are only half the job)

• Refrigerant gauges for system-side pressures (separate from duct/gas manometers)
• Vacuum gauges + vacuum pumps for evacuation verification
• Electrical testing tools to pair pressure symptoms with motor/control diagnosis
• Indoor air quality tools when airflow complaints overlap comfort/IAQ

FAQs – Manometers

Trust, compliance & shopping with HVACShop

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Australian compliance disclaimer

HVACShop supplies tools and equipment. Installation, commissioning, servicing and refrigerant handling activities may be regulated. If work involves fluorocarbon refrigerant (or a component that carries the risk of refrigerant being emitted), an appropriate Refrigerant Handling Licence is required — see ARCtick guidance. Gasfitting and some electrical work are also regulated — use appropriately licensed trades and follow site procedures.

Content governance

• Author: HVACShop Content Team (AU)
• Reviewer: Refrigeration & air-conditioning technician
• Last updated: 2026-01-13 (AEST)