Amprobe TMA-21HW Hotwire Anemometer with Temperature

High‑accuracy hotwire airflow and temperature measurement for HVAC & industrial testing

The Amprobe TMA‑21HW is a precision hotwire anemometer designed for low‑air‑velocity measurement in ducts, ventilation systems, clean rooms, and industrial airflow applications. With wide airflow range, dual measurement modes, and built‑in temperature sensing, it’s ideal for technicians who need fast, accurate airflow diagnostics.

Key Features

• Hotwire sensor for low‑velocity airflow measurement
• Air velocity, air volume & temperature
• Wide measurement range for HVAC and industrial systems
• Min/Max/Avg & Data Hold
• Auto power‑off
• Backlit display for low‑light environments
• Extendable telescopic probe for ducts and vents
• Rugged handheld design

Core Specifications

• Air velocity:
  • 0.2 to 20 m/s
  • Accuracy: ±(3% + 0.1 m/s)
• Air volume:
  • 0 to 99,999 m³/min (calculated from duct size)
• Temperature:
  • –10°C to +60°C
  • Accuracy: ±1°C
• Resolution:
  • Velocity: 0.01 m/s
  • Temperature: 0.1°C
• Probe length: Telescopic, up to ~1 m
• Display: Large backlit LCD
• Power: 9 V battery
• Weight: ~350 g

Ideal Applications

• HVAC commissioning & troubleshooting
• Ventilation system balancing
• Clean room airflow verification
• Industrial airflow measurement
• Laboratory airflow checks
• Low‑velocity duct testing

Hiring with Measurements101
Booking is simple: select your dates, choose your equipment, and check out. Once your order is placed, we’ll be in touch within the hour to organise delivery.
Not sure if this is the right tester for your job? Give us a call anytime — we’re always happy to help you get the right tool.

*Specifications are indicative only and may vary in practice. Please confirm suitability for your application.*