Digital Manometer Differential Pressure Gauge HVAC Air Gas Tester Backlit 30PSI
Key Features
🔧 Versatile Pressure Measurement – Measures differential pressure, positive pressure, and negative pressure with one compact instrument. Perfect for HVAC system balancing, gas pressure troubleshooting, and ventilation testing.
📐 11 Selectable Pressure Units – Seamlessly switch between inH₂O, psi, bar, mbar, kPa, inHg, mmHg, ozin², ftH₂O, cmH₂O, and kgcm². No more manual conversions – work with the units your local standards require.
🎯 High Accuracy ±0.3% FS – Trust your readings with lab-grade precision. With ±0.1% FS linearity/hysteresis and ±0.25% repeatability, this gauge delivers consistent, reliable measurements you can depend on for critical system diagnostics.
📊 Data Hold & Record Mode – Freeze readings with one touch using the HOLD function. Activate RECORD mode to capture and review Maximum, Minimum, and Average values during your testing session – ideal for identifying system fluctuations and intermittent issues.
⚖️ Tare/Zero Function – Eliminate baseline drift with the long-press zero reset. If you notice a small offset before measurement, simply hold the zero key for 5+ seconds and the display resets to ―――, ensuring every reading starts from a true reference point.
💡 Backlit LCD Display – Work in dim mechanical rooms, crawl spaces, or outdoor sites with confidence. The bright backlight illuminates your readings clearly and automatically turns off after 30 seconds to conserve battery life.
🔌 Quick-Connect 1/8" (3.18mm) Fitting – Simple, tool-free hose connection saves time on every job. No fiddling with threaded adapters – just push and go.
Product Parameters
| Parameter | Specification |
|---|---|
| Accuracy | ±0.3% FS |
| Linearity/Hysteresis | ±0.1% FS |
| Repeatability | ±0.25% FS |
| Maximum Pressure Limit | 30 psi |
| Pressure Connection | 1/8" (3.18mm) quick-connect fitting |
| Operating Temperature | 0 to 40°C |
| Storage Temperature | -10 to 60°C |
| Unit | Range | Resolution |
|---|---|---|
| inH₂O | ±830 | 1 |
| psi | ±30.00 | 0.01 |
| mbar | ±2068 | 1 |
| kPa | ±206.8 | 0.1 |
| inHg | ±61.08 | 0.01 |
| mmHg | ±1551 | 1 |
| ozin² | ±480.0 | 0.1 |
| ftH₂O | ±69.20 | 0.01 |
| cmH₂O | ±2109 | 1 |
| kgcm² | ±2.109 | 0.001 |
| bar | ±2.068 | 0.001 |
Why Choose This Digital Manometer?
When you're diagnosing air balancing issues in a commercial HVAC system, troubleshooting a gas pressure regulator, or verifying duct static pressure, you need accuracy you can trust and a tool that works as hard as you do.
✅ Professional Performance Without the Premium Price Tag
This manometer delivers ±0.3% FS accuracy – specifications typically reserved for instruments costing two or three times as much. For HVAC technicians, maintenance engineers, and facility managers, that means lab-grade confidence in a field-ready package. You're not overspending for a fragile benchtop unit; you're getting a rugged, portable gauge that fits in your tool bag and performs in real-world conditions.
✅ Solves Real Problems on Every Job
For HVAC Technicians – Quickly verify duct static pressure, filter pressure drops, and fan system performance. Switch between inH₂O and kPa instantly to match local building codes and equipment specs.
For Gas System Troubleshooters – Test gas pressure regulators and burner manifold pressures with 0.01 psi resolution. The 30 psi max limit gives you plenty of headroom for most residential and light commercial systems.
For Maintenance Engineers – Monitor pressure differentials across filters, coils, and pumps. Use RECORD mode to track Min/Max/Avg values over a test cycle – perfect for identifying intermittent faults that single-point readings would miss.
For Field Calibration & Validation – Verify the accuracy of installed pressure sensors and transmitters. The tare function lets you zero out baseline offsets, so you're measuring real differential pressure, not the gauge's own drift.
✅ Designed for the Way You Actually Work
No one wants to fumble through menus on a jobsite. This manometer keeps it simple:
One-touch unit cycling – No complicated setup menus. Press the UNIT button to scroll through all 11 scales until you see the one you need.
Hold and record independent – Freeze a reading while still tracking max/min in the background.
Auto power-off that you control – Leave it ON when you're doing long-duration monitoring, or turn it ON to save batteries when you're hopping between multiple locations.
Quick-connect fittings – Connect and disconnect hoses in seconds. No thread sealant, no wrenches.
✅ The "No Surprises" Tool
ERR1 / ERR2 warnings tell you immediately if you've exceeded the measurement range – no guessing, no damaged sensors.
Low battery indicator gives you ample warning before it's time to swap cells.
No proprietary batteries – standard AAA cells (not included) mean you can grab replacements anywhere.
📦 Package Includes
1 × Digital Differential Manometer
1 × Fitting
1 × User Manual
- 2 × Tubes
Batteries are NOT included
