Extech Hot Wire CFM Thermo-Anemometer Data Logger SDL350 User Guide and Manual
Summary
This professional thermo-anemometer and data logger provides precise measurements of air velocity, airflow (CFM), and temperature using a telescoping probe. Essential for HVAC professionals, engineers, and industry technicians, this unit automatically records readings onto an SD card in analysis-ready Excel format. The manual details logging procedures, specifications, and advanced functions necessary for detailed environmental monitoring and system commissioning.
Page 1 Text Content
Hot Wire CFM Thermo-Anemometer/Datalogger Records data on an SD card in Excel® format For easy transfer to a PC for analysis
Features: Air Velocity/Air Flow meter with telescoping probe designed to fit into HVAC ducts and other small openings Datalogger date/time stamps and stores readings on an SD
card in Excel® format for easy transfer to a PC
Probe extends up to 7.05ft (215cm) maximum length with cable 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 or Air Flow and Temperature simultaneously Record/Recall MIN, MAX readings Data Hold plus Auto power off with disable function Built-in PC interface Complete with 6 x AA batteries, SD card, 3.1ft (95cm) fully extended telescoping probe with 3.9ft (120cm) cable, and hard carrying case
Specifications Range Resolution Basic Accuracy Air Velocity m/s 0.2 to 25m/s 0.01m/s ±5%rdg ft/min 40 to 3940ft/min 1ft/min ±5%rdg MPH 0.5 to 45MPH 0.01MPH ±5%rdg knots 1 to 31knots 0.01knots ±5%rdg km/h 0.7 to 72km/h 0.01km/h ±5%rdg
CFM (feet3/min) 0 to 1,907,000 CFM 0.001 to 100 CFM
CMM (meter3/min) 0 to 54,000 CMM 0.001 to 1 CMM Temperature 32 to 122°F (0 to 50°C) 0.1° ±1.5ºF (±0.8ºC) Type K Temperature -148 to 2372°F (-100 to 1300°C) 0.1° ±(0.4% + 1.8°F/1°C) Type J Temperature -148 to 2192°F (-100 to 1200°C) 0.1° ±(0.4% + 1.8°F/1°C) Memory 20 Million data records using 2G SD card Dimensions 7.2 x 2.9 x 1.9" (182 x 73 x 47.5mm) Weight 23.1oz (655g)
Ordering Information: SDL350 ................Hot Wire CFM Thermo-Anemometer SDL350-NIST ......SDL350 with Certificate Traceable to NIST ................Type J Bead Wire Probe (-328 to 392°F/-200 to 200°C) TP870 ..................Type K Bead Wire Probe (-40 to 482°F/-40 to 250°C) TP200 ..................Type K Clamp Probe (-4 to 200°F/-20 to 93°F) TP400 ..................Type K Clamp Probe (-4 to 450°F/-20 to 232°C) ................117V AC Adaptor UA100-240 ..........100-240V AC Adaptor with 4 plugs (US, EU, UK, AU)
www.extech.com Specifications subject to change without notice. 9/28/11 - R1 Copyright © 2010 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
Page Summary Contents For Extech Hot Wire CFM Thermo-Anemometer Data Logger SDL350 User Guide and Manual
Manual Details
| Brand | CFM |
|---|---|
| Pages | 1 |
| File Size | 187.80 KB |
| Published | May 17, 2026 |
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Frequently Asked Questions
How can I read the recorded data?
The device records data on an SD card that is formatted in Excel, allowing for easy transfer to a PC for analysis.
What are the measurement ranges and accuracies?
Air Velocity accuracy is ±5% rdg (0.01 m/s) across a range of 0.2 to 25 m/s.
What types of thermocouple inputs are available?
It supports Type K (usable on -148 to 2372°F / -100 to 1300°C) and Type J thermocouples.
Does the unit offer field adjustments for data collection?
You can adjust the data sampling rate from 1 second up to 3600 seconds (1 hour).
What are the physical dimensions of the main unit?
The device size is 7.2 x 2.9 x 1.9 inches (182 x 73 x 47.5mm), and it weighs 23.1 oz (655g).