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Connector Type
RS232 Connectors
SD Card Connectors
Sensor Type
Temperature / Freeze
Tool Type
Temperature Measurement
Wind Measurement
SD Card
Serial - RS-232
Auto-Shut Off
Battery Operated
LCD Display
Ease of Installation
Beginner (Installs < 10 minutes)
Extech Instruments
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Measures Air Velocity and Temperature in your HVAC Ducts
Extech Instruments SDL350 Hot Wire CFM Thermo-Anemometer Datalogger
Extech Instruments SDL350 Hot Wire CFM Thermo-Anemometer Datalogger
Extech Instruments SDL350 Hot Wire CFM Thermo-Anemometer Datalogger
Item# 90213
Price: Normally $599.00 
Hot Deal $493.29
Free shipping on orders over $50 - See Details


  • Air Velocity/Air Flow meter with telescoping probe
  • Stores 99 readings manually and more on SD Card
  • LCD displays Air Velocity and Temperature simultaneously

Essential Info

The Extech SDL350 Hot Wire Thermo-Anemometer Datalogger meter displays and stores air velocity and temperature readings. Temperature readings from the thermometer built into the vane probe or from an externally connected type K or J thermocouple temperature probe can be displayed and recorded. Data is stored on the included 2GB SD card for transfer to a PC. This meter is shipped fully tested and calibrated, with proper use, will provide years of reliable service.

  • Air Velocity/Air Flow meter with telescoping probe designed to fit into HVAC ducts and small openings
  • Datalogger date/time stamps and stores readings on an SD card in Excel format for easy transfer to PC
  • Adjustable data sampling rate: 1 to 3600 seconds
  • Stores 99 readings manually and 20M readings via 2G SD card
  • Type K/J Thermocouple input for high temperature measurements
  • Large (9999 count) LCD displays Air Velocity and Temperature simultaneously
  • Probe extends up to 7.05ft (215cm) maximum length with cable
  • Record/Recall MIN, MAX readings
  • Data Hold plus Auto power off with disable function
  • Built-in PC interface

  • Manuals/Software

    What's Included

    1x - Metal Vane Sensor
    6x - AA Batteries
    1x - 3.1 Foot Telescoping Probe
    1x - 2GB SD Card
    1x - 3.9 Foot Cable
    1x - Hard Carrying Case


    ManufacturerExtech Instruments
    Manufacturer Product NoSDL350
    DisplayBacklit LCD (2 x1.5 Inches)
    Sensor TypesHot-wire thermistor for air velocity and air flow
    Thermistor for temperature sensor
    Thermocouple for remote temperature
    Air Velocity Measurementm/S, Km/h, Ft/min, Knots, Mile/h (mph)
    Air Temp Measurement°C / °F
    Air Flow (volume)CFM or CMM
    Datalogger Sampling RateAUTO: 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600
    Memory CardSD memory card;1G to 16GB (2GB Included)
    Data HoldFreeze the display reading
    Memory RecallRecord and Recall the Maximum and Minimum readings
    Display update rateApprox. 1 second
    Data OutputRS-232 / USB PC computer interface
    Operating Temperature0 to 50°C (32 to 122°F)
    Operating Humidity85% R.H. max.
    Auto Power OFFAfter 10 minutes of inactivity
    Power SupplySix 1.5VDC AA Batteries (included)
    Power ConsumptionApprox. 15 mA dc
    Weight.76lbs (347g)
    Main Instrument7.1" x 2.9" x 1.9" (182 x 73 x 47.5mm)
    Telescoping Probe.05" Diameter x 11" Length x 36" Max Length
    Cable Length7 Feet (2.1M)
    Air Temperature
    Measuring Range0 to 50°C (32 to 122°F)
    Resolution0.1°C (0.1 °F)
    Accuracy± 0.8°C (1.5°F)
    Air Flow
    CMM Measuring Range0 to 54,000 CMM
    CMM Resolution0.001 to 1 CMM
    CFM Measuring Range0 to 1,907,000 CFM
    CFM Resolution0.001 to 100 CFM

    Air Velocity
    m/S0.2 - 5.0 m/s
    5.1 - 25.0 m/s
    Km/h0.7 - 18.00 km/h
    18.0 - 72.0 km/h
    mph (Mile/h)0.5 - 11.20 mph
    11.2 - 44.7 mph
    Knots0.40 - 9.70 knots
    9.7 - 38.8 knots
    FPM (Ft/min)40 - 3940 ft/min1 FPM
    Important notes:
    Only defective exchanges for identical item within 30 days of purchase. No other returns allowed on this item. For defective returns after 30 days, please contact the manufacturer.
    Manufacturer contact information: Extech Instruments Corp, Tel: (781) 890-7440 Ext 200



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