TPI 665L Dual Input Digital Manometer
The TPI 665L Dual Input Digital Manometer provides fast and accurate pressure measurement for HVAC, maintenance, and general testing work. It measures differential pressure from two sources at the same time and delivers reliable results across a wide operating range. The clear dual-line display also makes readings easy to view in different working conditions.
Built for everyday use, the instrument offers a measurement range of ±101.5 psi (±7 bar) with a resolution of 0.01 psi. Users can switch between seven pressure units, making it suitable for a variety of applications. In addition, one-touch zeroing helps speed up setup and improves convenience during testing.
Reliable Measurement Performance
Accuracy is important when working with pressure systems, and the TPI 665L Dual Input Digital Manometer is designed with this in mind. It provides accuracy of 0.2% full scale and repeatability of 0.1% full scale. As a result, users can achieve consistent measurements across repeated tests.
The large five-digit dual-line LCD display includes a backlight for improved visibility. Data hold, smoothing, minimum and maximum recording, and resolution selection functions give users greater control over measurements. Furthermore, the differential input design with 1/4″ NPT connections supports straightforward installation.
Data Logging and Connectivity
For longer monitoring tasks, the TPI 665L Dual Input Digital Manometer can log up to 5000 readings with time and date information when used with the optional A665 software and interface. Internal memory can also store up to 16 readings for quick review in the field. This helps users collect and manage test data more efficiently.
Two different set types are available to suit different requirements. Optional accessories support PC communication through an IR to USB interface, while automatic power-off helps extend battery life during normal operation. With a typical battery life of up to 600 hours, the instrument is suitable for regular professional use.
Key Features
- Dual input differential pressure measurement capability
- Measures pressure from two sources simultaneously
- One-touch zero function for quick setup
- Five-digit dual-line LCD display with backlight
- Minimum and maximum value recording
- Data hold function for capturing readings
- Smoothing function for stable measurements
- Resolution selection feature
- Supports seven selectable pressure units
- Internal memory stores up to 16 readings
- Automatic power-off function can be disabled
- Compatible with optional PC software and interface
- Optional direct printing support via A740 IR printer
- Available in two different set configurations
Technical Specifications
| Product | TPI 665L Dual Input Digital Manometer |
| Manufacturer | Test Products International |
| Manufacturer part code | 665L |
| Measurement range | ±101.5 psi (±7 bar) |
| Input type | Differential pressure with 1/4″ NPT connection |
| Resolution | 0.01 psi (0.001 bar) (0.1 inH2O) |
| Accuracy | 0.2% full scale |
| Repeatability | 0.1% full scale |
| Mean temperature coefficient | 0.1% of reading per °C |
| Display | 5 digit dual-line LCD with backlight |
| Pressure units | bar, kPa, PSI, mmHg, inHg, mmH2O, inH2O |
| Number of pressure units | 7 selectable units |
| Data logging capacity | 5000 readings |
| Logging interval | 1 second to 24 hours |
| Internal storage | 16 data points |
| Communication | IR to USB interface with optional A665 software |
| Data export | Supported through optional PC application software |
| Functions | Zero, Data Hold, Backlight, Unit Selection, Smoothing, Min/Max Record, Resolution Selection |
| Printing compatibility | Optional A740 IR printer support |
| Battery type | 2 x AA 1.5V alkaline batteries (MN1500, LR6) |
| Typical battery life | 600 hours |
| Auto power off | 20 minutes, user selectable disable option |
| Application suitability | Non-corrosive liquid pressure applications |
| Available versions | Two different set types available |
| Warranty | Not specified |
Comparison Table
| Feature | TPI 665L |
|---|---|
| Dual input measurement | ✓ |
| Differential pressure measurement | ✓ |
| ±100 psi pressure range | ✓ |
| 0.01 psi resolution | ✓ |
| 5 digit dual-line display | ✓ |
| Backlit screen | ✓ |
| 7 pressure units | ✓ |
| Data logging | ✓ |
| 5000 reading capacity | ✓ |
| Data hold function | ✓ |
| Min/Max recording | ✓ |
| Internal data storage | ✓ |
| IR to USB communication | ✓ |
| Optional PC software support | ✓ |
| Auto power off | ✓ |
Document Downloads
What’s Included
- TPI 665L Dual Input Digital Manometer
- 2 x AA alkaline batteries
- User documentation
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