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Product Description

The Labmart HT-9819 CFM/CMM Thermo-Anemometer is a multifunction digital instrument for measuring air velocity, volumetric air flow and temperature. It supports CFM and CMM airflow measurement, five air-velocity units, simultaneous display of airflow/velocity and temperature, and 20-point averaging for practical HVAC, laboratory and industrial measurements.

Product Overview

The HT-9819 CFM/CMM Thermo-Anemometer combines air velocity, airflow and temperature measurement in a portable handheld instrument. Its external vane probe is designed for quick airflow checks at ventilation outlets, ducts and other air-moving systems.

The instrument supports air velocity measurements in m/s, km/h, ft/min, MPH and knots, while volumetric airflow can be displayed in CMM or CFM. The user can enter the relevant area of the air passage to calculate volumetric flow.

A large dual-function LCD allows airflow or air velocity and temperature to be viewed simultaneously. MAX, MIN and AVG functions, Data Hold, low-battery indication and automatic power-off further support routine measurement and recording.

Key Features & Benefits

  • Three-in-one measurement: Measures air velocity, air flow and temperature in one instrument.
  • CFM & CMM measurement: Supports volumetric airflow calculations in commonly used imperial and metric units.
  • Five air-velocity units: Provides flexibility for HVAC, laboratory and industrial applications.
  • 20-point averaging: Helps obtain a representative airflow or velocity reading from multiple measurements.
  • Simultaneous display: Air velocity/airflow and temperature can be monitored together.
  • MAX/MIN/AVG functions: Useful for observing changing airflow conditions.
  • Large LCD: Provides clear measurement visibility.
  • Area memory: Air-passage area can be entered and stored for airflow calculations.
  • Portable vane probe: Suitable for quick spot measurements at ventilation outlets and other airflow locations.

4. Technical Specifications

Specification Details
Product Type CFM/CMM Thermo-Anemometer
Model HT-9819
Brand Labmart
Measurement Functions Air Velocity, Air Flow and Temperature
Probe Type Vane Probe
Air Velocity Range – m/s 0.40–30.00 m/s
Air Velocity Resolution – m/s 0.01 m/s
Air Velocity Accuracy – m/s ±(3% + 0.20 m/s)
Air Velocity Range – km/h 1.4–108.0 km/h
Resolution – km/h 0.1 km/h
Accuracy – km/h ±(3% + 0.8 km/h)
Air Velocity Range – ft/min 80–5900 ft/min
Resolution – ft/min 1 ft/min
Accuracy – ft/min ±(3% + 40 ft/min)
Air Velocity Range – MPH 0.9–67.0 MPH
Resolution – MPH 0.1 MPH
Accuracy – MPH ±(3% + 0.4 MPH)
Air Velocity Range – Knots 0.8–58.0 knots
Resolution – Knots 0.1 knots
Accuracy – Knots ±(3% + 0.4 knots)
Air Flow – CMM 0–9999 m³/min
CMM Resolution 1 m³/min
CMM Area Setting 0–9.999 m²
Air Flow – CFM 0–9999 ft³/min
CFM Resolution 1 ft³/min
CFM Area Setting 0–9.999 ft²
Air Temperature Range -10 to 60°C / 14 to 140°F
Temperature Resolution 0.1°C / 0.1°F
Temperature Accuracy ±2.0°C / ±4.0°F
Temperature Sensor NTC Thermistor
Display Large dual-function 4-digit LCD
Sampling Rate 1 reading/second
Averaging 20-point average
Functions MAX, MIN, AVG, Data Hold
Area Memory Yes
Low Battery Indication Yes
Auto Power Off After approximately 15 minutes
Power Supply 9V battery
Dimensions 202 × 85 × 48 mm
Weight Approx. 240 g
Accessories Battery, user manual, carrying case/box

5. Applications

  • HVAC system airflow testing
  • Ventilation system inspection
  • Air duct measurements
  • Clean room airflow checks
  • Laboratory airflow measurement
  • Industrial ventilation
  • Air-conditioning system maintenance
  • Fan and blower performance checks
  • Workshop ventilation testing
  • Environmental air-flow assessment
  • Power and energy-sector applications
  • Petrochemical facilities
  • Iron and steel industries
  • Airflow measurements at ventilation outlets
  • General air velocity and temperature monitoring

6. Suitable For

  • HVAC engineers and technicians
  • Laboratory professionals
  • Clean room maintenance teams
  • Facility management teams
  • Industrial maintenance departments
  • Ventilation contractors
  • Environmental monitoring teams
  • Quality-control personnel
  • Engineering and research departments
  • Manufacturing plants
  • Workshops and technical service teams

7. Product Benefits

  • Multifunction measurement: Reduces the need for separate instruments for air velocity, airflow and temperature.
  • CFM/CMM capability: Supports both metric and imperial volumetric airflow measurement.
  • Multiple velocity units: Convenient for different engineering and HVAC measurement practices.
  • 20-point averaging: Helps evaluate airflow across multiple measurement points.
  • Simultaneous readings: Allows air movement and temperature to be observed together.
  • Area setting: Enables airflow calculations based on the measured duct or opening area.
  • MAX/MIN/AVG monitoring: Useful when airflow fluctuates during operation.
  • Portable design: Suitable for field inspections as well as laboratory and workshop use.
  • Simple digital operation: Large LCD and dedicated functions make routine measurements convenient.

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