Supco DDM55 dual digital manometer – reliable pressure testing for HVAC techs
The Supco DDM55 is a professional-grade manometer designed for precise differential and absolute pressure readings. With dual input ports, it’s perfect for leak testing, diagnostics, and balancing airflow—giving HVAC systems the accuracy and safety they need.
Built tough for the job site, it features a backlit digital display, user-friendly controls, and a compact, durable housing. It’s ideal for use with both gas and propane systems.
Key features
- ✅ Dual input for differential and absolute pressure
- ✅ Wide range: -55" to +55" water column
- ✅ Test pressure switches and delivery pressure
- ✅ Great for leakage and airflow diagnostics
- ✅ Comes with a soft carrying case
Specifications
| Display | Dual LCD |
| Accuracy | ± 0.3% FSO (25°C) |
| Repeatability | ± 0.2% (Max. ± 0.5% FSO) |
| Linearity / Hysteresis | ± 0.29% FSO |
| Pressure Range | ± 2 psi |
| Maximum Pressure | 10 psi |
| Response Time | 0.5 seconds typical |
| Low Battery Indicator | Yes |
| Over Range Indicator | Err.1 |
| Under Range Indicator | Err.2 |
| Operating Conditions | 32°F to 122°F (0°C to 50°C) |
| Storage Conditions | 14°F to 140°F (-10°C to 60°C) |
| Power Supply | 9V battery (included) |
Upgrade your HVAC toolkit with the precision of the Supco DDM55, built for tradies who demand accuracy and performance.