GTI GTI113 Handheld Differential Pressure Meter
| Brand | GTI |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | GTI113 |
| Price | USD 765 (based on ¥5520 at 1 USD ≈ ¥7.2) |
| Accuracy | ±0.5% of reading ±0.5 Pa |
| Resolution | 0.1 Pa |
| Differential Pressure Range | ±500 Pa |
| Overpressure Limit | ±10 kPa |
| Air Velocity Range | 0.2–25 m/s |
| Air Velocity Accuracy | ±1.5% of reading at 10.0 m/s |
| Velocity Resolution | 0.01 m/s |
| Volumetric Flow Range | 0–999999 m³/h |
| Flow Resolution | 1 m³/h |
| Temperature Measurement | Integrated |
| Operating Temperature | 0–60 °C (non-condensing) |
| Storage Temperature | −20–70 °C (non-condensing) |
| Power Supply | 4 × AA batteries or DC 5 V adapter |
| Battery Life | >15 hours |
| Weight (with batteries) | 363 g |
| Display | High-resolution color LCD |
| Units | Multiple selectable pressure units (Pa, kPa, inH₂O, mmH₂O, psi, mbar, etc.) |
Overview
The GTI GTI113 Handheld Differential Pressure Meter is an engineered precision instrument designed for real-time, field-deployable measurement of low-differential pressure in HVAC, cleanroom, fume hood, and industrial ventilation systems. Based on high-stability silicon piezoresistive sensing technology with temperature-compensated signal conditioning, the GTI113 delivers traceable accuracy across its full ±500 Pa range—critical for verifying airflow integrity, filter efficiency, and containment performance per ISO 14644-3, ASHRAE 110, and IEST-RP-CC006.2 protocols. Unlike fixed-mount transmitters, its handheld architecture enables rapid point-of-use verification during commissioning, preventive maintenance, and regulatory audits—without requiring system shutdown or permanent installation.
Key Features
- High-fidelity differential pressure measurement with total uncertainty of ±0.5% of reading ±0.5 Pa—validated per ISO/IEC 17025-accredited calibration procedures
- Integrated multi-parameter functionality: simultaneous differential pressure, air velocity (0.2–25 m/s), and ambient temperature monitoring
- True bidirectional capability: measures positive, negative, and reversing pressure differentials without manual zeroing or polarity switching
- Color LCD display with intuitive icon-driven interface; supports dynamic unit conversion among Pa, kPa, mmH₂O, inH₂O, psi, mbar, and bar
- Robust mechanical design: IP54-rated enclosure, shock-absorbing rubberized housing, and sealed membrane keypad for operation in dusty or humid environments
- Extended operational endurance: >15 hours of continuous use on four standard AA alkaline cells; optional DC 5 V external power support for benchtop or long-duration testing
Sample Compatibility & Compliance
The GTI113 is compatible with standard 1/8″ NPT or push-fit tubing connections for pitot tube, manifold, or static pressure port coupling. It meets electromagnetic compatibility requirements per EN 61326-1 (industrial environment) and conforms to RoHS Directive 2011/65/EU. While not intrinsically safe, it is rated for non-hazardous area use (Class I, Division 2). Data logging outputs (via optional USB or Bluetooth module) support traceability under GLP and GMP frameworks when paired with compliant software—enabling audit-ready records aligned with FDA 21 CFR Part 11 electronic signature requirements.
Software & Data Management
The GTI113 supports optional PC-based configuration and data export via GTI LogView v3.x (Windows-compatible). Raw measurements—including timestamped pressure, velocity, temperature, and calculated volumetric flow (m³/h)—are exportable in CSV and Excel formats. Firmware updates are delivered through signed binary packages to ensure device integrity. All stored readings retain full metrological metadata (sensor ID, calibration date, operator tag, environmental conditions), facilitating ISO 17025-compliant uncertainty budgets and trend analysis over time.
Applications
- HVAC system balancing and duct leakage verification per SMACNA and ACCA standards
- Cleanroom classification (ISO 14644-1) and pressure cascade validation
- Fume hood face velocity and sash differential pressure compliance checks (ANSI/AIHA Z9.5)
- Filter integrity testing (pre-filter and HEPA bank ΔP trending)
- Pharmaceutical facility room pressurization mapping for contamination control
- Energy audit workflows involving fan static pressure and system resistance profiling
FAQ
What is the maximum overpressure the GTI113 can withstand without damage?
The sensor is rated for ±10 kPa overpressure—equivalent to 20× its full-scale differential range—ensuring robustness against accidental line surges or misconnection.
Does the GTI113 require periodic recalibration?
Yes. GTI recommends annual calibration against NIST-traceable standards; factory calibration certificates include as-found/as-left data and measurement uncertainty statements per ISO/IEC 17025.
Can the GTI113 compute volumetric flow directly?
Yes—when cross-sectional duct area is entered manually, the device calculates real-time m³/h using measured velocity and applies standard ISO 10780 correction factors for turbulence and profile distortion.
Is the temperature sensor used for pressure compensation?
Yes—the integrated thermistor provides real-time thermal drift correction for the pressure transducer, maintaining specified accuracy across the full 0–60 °C operating range.
What accessories are included by default?
Standard shipment includes: GTI113 meter, protective carrying case, 4 × AA batteries, silicone-tubing probe set (L-shaped and straight tips), user manual (English), and calibration certificate.
