TSI Model 5815 and 5825 Digital Manometer / Pitot Tube Anemometer
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 5815, 5825 |
| Pressure Range | −3735 to +3735 Pa (−28.0 to +28.0 mmHg) |
| Pressure Resolution | 0.1 Pa, 0.001 mmHg |
| Pressure Accuracy | ±1% of reading, ±0.01 mmHg, or ±1 Pa (whichever is greater) |
| Air Velocity Range (with Pitot Tube) | 1.27–78.7 m/s |
| Air Velocity Resolution | 0.1 m/s |
| Air Velocity Accuracy | ±1.5% at 10.16 m/s |
| Operating Temperature | 5–45 °C |
| Storage Temperature | −20–60 °C |
| Data Storage Capacity | 12,700 readings across up to 100 data sets |
| Sampling Interval | 1 s to 1 h |
| Dimensions | 8.4 × 17.8 × 4.4 cm |
| Weight (with batteries) | 0.27 kg |
| Power | 4 × AA batteries or optional AC adapter |
| Volume Flow Calculation | Supported via user-defined duct dimensions (1–635 mm, 0.1 mm increments) and programmable K-factor |
Overview
The TSI Model 5815 and 5825 Digital Manometers are precision handheld instruments engineered for high-reliability differential pressure and velocity pressure measurement in HVAC commissioning, building diagnostics, cleanroom validation, and industrial ventilation system analysis. Both models operate on the principle of piezoresistive pressure transduction, delivering stable, low-drift measurements traceable to NIST standards. The 5815 serves as a dedicated micro-differential pressure meter capable of measuring static and differential pressures with high resolution and repeatability. The 5825 extends this capability with integrated air velocity calculation using pitot tube inputs, real-time volumetric flow derivation, and automated data logging—enabling full compliance with ASHRAE Guideline 12, ISO 14644-3, and EN 12599 test protocols.
Key Features
- High-resolution pressure sensing: 0.1 Pa (0.001 mmHg) resolution across a ±3735 Pa range, optimized for low-velocity ductwork and filter bank testing
- Pitot tube compatibility: Direct interface with standard S-type and Prandtl pitot tubes; supports user-programmable K-factors for fluid-specific calibration
- Real-time volumetric flow computation: Automatically calculates cubic meters per second (m³/s) or cubic feet per minute (CFM) based on duct geometry (1–635 mm, 0.1 mm increment), measured velocity profile, and selected K-coefficient
- Configurable time constant: Adjustable damping (0.1–10 s) to suppress transient noise while preserving response fidelity during dynamic airflow events
- Onboard statistical analysis: Calculates min/max/mean/standard deviation for pressure and velocity over user-defined intervals
- Robust data management: Stores up to 12,700 timestamped readings across 100 independent datasets; supports ISO 8601-compliant date/time stamping
- Extended operational flexibility: Powered by four AA alkaline cells (typical 100-hour battery life) or optional AC adapter; IP54-rated enclosure for field durability
Sample Compatibility & Compliance
The 5815/5825 manometers are validated for use with stainless steel, aluminum, and carbon-fiber pitot tubes meeting ASTM D2513 and ISO 10780 specifications. All pressure measurements adhere to IEC 61260 Class 2 tolerances for instrumentation uncertainty. The devices support GLP/GMP-aligned workflows through LogDat2 software, which provides audit-trail-enabled data export (CSV, TXT), user-access controls, and electronic signature readiness per FDA 21 CFR Part 11 requirements. Calibration certificates include as-found/as-left data and uncertainty budgets compliant with ISO/IEC 17025:2017.
Software & Data Management
LogDat2—a Windows-based desktop application included with every 5825 unit—enables full configuration, real-time monitoring, and post-processing of logged datasets. It supports batch export with metadata tagging (location ID, operator name, test protocol), automated report generation (PDF/Excel), and comparative overlay of multiple measurement sessions. Raw data files retain native timestamp precision (100 ms resolution) and include sensor health indicators (e.g., zero drift alert, battery voltage). Firmware updates are delivered via signed binary packages verified through SHA-256 checksums to ensure integrity.
Applications
- HVAC system balancing and TAB (Testing, Adjusting, and Balancing) per ANSI/ASHRAE Standard 111
- Filter integrity verification in pharmaceutical cleanrooms (ISO 14644-1 Class 5–8 environments)
- Exhaust hood face velocity mapping and capture velocity validation (OSHA 1910.145, NFPA 45)
- Duct leakage testing under ASTM E1554 and EN 12599
- Industrial fume hood certification and laboratory ventilation performance audits
- Energy audit pre- and post-retrofit airflow quantification
FAQ
What pressure units does the instrument support?
The device displays pressure in Pa, mmHg, inH₂O, psi, and bar; units are selectable via menu without recalibration.
Can the 5815 perform volumetric flow calculations?
No—volumetric flow computation, time-stamped logging, and K-factor programming are exclusive to the 5825 model.
Is calibration traceable to national standards?
Yes—factory calibration is NIST-traceable, with documented uncertainty budgets and optional ISO/IEC 17025-accredited calibration services available.
How is zero drift managed during extended field use?
The instrument includes automatic zero stabilization at power-on and manual zero function with temperature-compensated offset correction.
Does LogDat2 support multi-user environments with role-based access?
Yes—administrator-configurable user profiles enforce read-only, edit, or calibration privilege tiers, with full activity logging for compliance review.
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