The Extech SDL300 is a versatile thermo-anemometer with integrated SD card data logging capabilities. It records air velocity and temperature measurements directly to an SD card in Excel format with date and time stamps, enabling easy transfer to a PC for analysis without special software. For quick spot checks, up to 99 readings can be stored and recalled manually.

A low-friction ball bearing vane wheel on a 1-meter cable provides ±2% velocity accuracy, while the large 9999-count LCD simultaneously displays air velocity and temperature for clear field viewing. The adjustable sampling rate from 1 to 3600 seconds accommodates both short-term spot checks and long-term trend monitoring. An additional Type K/J thermocouple input expands the instrument's utility for high-temperature applications.

Field-friendly features include Min/Max recall, Data Hold, and a disableable auto power off function. The built-in RS-232 interface allows real-time data transfer to a PC when connected.

Typical applications include:

• Long-term HVAC system performance monitoring
• Ventilation and exhaust system balancing
• Industrial hygiene and IAQ investigations
• High-temperature process airflow measurement

Features

• SD card data logging in Excel format with date/time stamp
• Selectable sampling rate: 1 to 3600 seconds
• Manual store/recall of up to 99 readings
• ±2% air velocity accuracy
• Large 9999-count LCD with simultaneous display
• Type K/J thermocouple input
• Min/Max recall, Data Hold, auto power off (disableable)
• Built-in RS-232 interface
• Low friction ball bearing vane wheel on 1m cable