TSI AP500 AirPro Bluetooth Digital Anemometer & Thermo-Hygrometer
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | AP500 |
| Atmospheric Pressure Range | 517.1–930.9 mmHg (20.36–36.65 inHg) |
| Accuracy (Pressure) | ±2% of reading |
| Operating Temperature (Electronics) | 5–45 °C |
| Storage Temperature | −20–60 °C |
| Battery | Rechargeable Li-ion, 3500 mAh |
| Runtime | >8 h at 0.5 m/s, 25 °C |
| Display | OLED, 10 mm digit height |
| Dimensions (W×L×D) | 53 × 181 × 40 mm |
| Weight (with battery) | 0.23 kg |
| Wind Speed Range (VT-S/VTH-S/VT-A/VTH-A) | 0–30 m/s |
| Wind Speed Accuracy | ±3% of reading or ±0.015 m/s (whichever is greater) |
| Wind Speed Resolution | 0.01 m/s |
| Temperature Range (all probes) | −10–65 °C |
| Temperature Accuracy | ±0.3 °C |
| Temperature Resolution | 0.1 °C |
| Relative Humidity Range (VTH-S/VTH-A/TH-S) | 5–95 %RH |
| RH Accuracy | ±3 %RH |
| RH Resolution | 0.1 %RH |
| Probe Length (straight/hinged) | 305 mm |
| Max Probe Diameter | 9.5 mm |
| Hinge Section Length (VT-A/VTH-A) | 152.4 mm |
Overview
The TSI AP500 AirPro Bluetooth Digital Anemometer & Thermo-Hygrometer is a field-deployable, precision-grade environmental monitoring instrument engineered for quantitative air velocity, temperature, and relative humidity measurements in demanding HVAC, laboratory, and cleanroom applications. Built on TSI’s AirPro platform architecture, the AP500 employs hot-wire anemometry principles—where convective heat transfer from a heated sensor element is correlated to local air velocity—and integrates thermistor-based temperature sensing with capacitive polymer humidity sensors. Its embedded atmospheric pressure transducer enables real-time air density correction, ensuring traceable volumetric flow calculations per ISO 16813 and ASHRAE 111 standards. The device operates as a standalone unit with onboard OLED display and dual-button interface (power + save), while its Bluetooth 5.0 LE radio supports bidirectional communication with the AirPro Mobile application on iOS and Android devices—enabling live parameter visualization, remote configuration, and synchronized calibration metadata exchange. Internal microSD card support allows autonomous long-term logging (up to 32 GB), meeting GLP-compliant data integrity requirements for unattended monitoring campaigns.
Key Features
- Hot-wire anemometry core with NIST-traceable calibration certificates supplied with every probe
- Integrated barometric pressure sensor (517.1–930.9 mmHg) for dynamic air density compensation in volumetric flow derivation
- OLED display with high-contrast 10 mm digits, readable under low ambient light and PPE conditions
- Rechargeable 3500 mAh lithium-ion battery with >8-hour runtime at typical indoor airflow conditions (0.5 m/s, 25 °C)
- USB-C rechargeable design eliminating disposable battery waste and reducing TCO over instrument lifecycle
- True one-handed operation enabled by ergonomic form factor (53 × 181 × 40 mm) and tactile button placement
- Modular probe ecosystem: straight and articulating variants (VT-S, VTH-S, VT-A, VTH-A, TH-S) with standardized 9.5 mm diameter and 305 mm active length
- Bluetooth 5.0 LE wireless protocol compliant with Bluetooth SIG specifications; supports firmware OTA updates and encrypted session handshaking
Sample Compatibility & Compliance
The AP500 is validated for use with TSI-certified AirPro probes across laminar and turbulent flow regimes typical of HVAC ductwork, fume hood face velocities, cleanroom ISO Class 5–8 environments, and biosafety cabinet inflow/exhaust verification. All probes meet ASTM D1076 (Standard Specification for Hot-Wire Anemometers), ISO 16813 (HVAC performance testing), and ANSI/ASHRAE Standard 125P (instrumentation requirements for air system balancing). Humidity sensors conform to ISO 18502 for hygrometer accuracy class B. Device firmware implements audit-trail-capable data logging aligned with FDA 21 CFR Part 11 Annex 11 principles—timestamped records include operator ID (via app login), probe serial number, calibration due date, and environmental context tags. No proprietary drivers or OS-specific software dependencies are required; data export formats include CSV, PDF report templates, and .tdms for LabVIEW integration.
Software & Data Management
The AirPro Mobile application (iOS/Android) provides full instrument control without requiring PC connectivity. Users configure measurement intervals (1 s to 60 min), define pass/fail thresholds, assign location tags, and initiate immediate or scheduled logging sessions. All data—including raw sensor values, computed air volume (CFM/L/s), and correction factors—is time-stamped with UTC synchronization via mobile network or GPS. Internal SD card storage retains data even during BLE disconnection, with automatic file rotation and cyclic overwrite protection. Export options include encrypted email transmission, cloud upload (AWS S3-compatible endpoints), and direct USB-Mass Storage mode for forensic data retrieval. Calibration history, firmware version, and battery health metrics are embedded in every dataset header, satisfying ISO/IEC 17025 documentation requirements for accredited laboratories.
Applications
- HVAC system commissioning and TAB (Testing, Adjusting, Balancing) per NEBB and AABC protocols
- Cleanroom airflow uniformity and velocity mapping (ISO 14644-3)
- Biosafety cabinet face velocity verification (NSF/ANSI 49) and duct traverse surveys
- Laboratory fume hood containment validation (ASHRAE 110)
- Building envelope infiltration assessment using tracer gas dilution correlation
- Industrial ventilation system compliance audits (OSHA 1910.94, EN 689)
- Educational aerodynamics labs requiring portable, student-safe instrumentation
FAQ
Does the AP500 require annual recalibration?
Yes. TSI recommends annual calibration against NIST-traceable reference standards per ISO/IEC 17025 Clause 6.5. Calibration certificates include as-found/as-left data and uncertainty budgets.
Can multiple AP500 units be operated simultaneously in the same space?
Yes. Each unit operates on a unique BLE address with configurable advertising intervals to prevent channel contention in dense deployments.
Is the SD card slot accessible without tools?
Yes. The microSD slot is located behind a rubberized, IP54-rated access door on the device base—no screwdriver required.
Are probe interchangeability and cross-calibration supported?
All AirPro probes feature plug-and-play electrical interfaces with automatic probe identification and model-specific correction algorithms loaded from internal EEPROM.
What happens if Bluetooth connection drops during logging?
The AP500 continues uninterrupted internal logging to SD card with no data loss; BLE reconnection restores real-time streaming and metadata sync upon recovery.
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