

Extech
Extech SDL300 Thermo-Anemometer Datalogger, SD Card Recording
Card or bank transfer · proforma invoice on request
Key specs from the product description
- Air velocity range
- 0.4 to 35 m/s (60 to 6900 ft/min; 0.7 to 78.2 mph)
- Air velocity accuracy
- ±(2% rdg + 0.2 m/s); ±(2% rdg + 40 ft/min)
- Air temperature range
- 32 to 158 °F (0 to 70 °C)
- Air temperature accuracy
- ±1.5 °F / 0.8 °C (below 60 °C)
- Type K temperature
- -100 to 1300 °C, ±(0.4% + 1 °C)
- Type J temperature
- -100 to 1200 °C, ±(0.4% + 1 °C)
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Datasheets & manuals
Manufacturer pages
Extech SDL300 Thermo-Anemometer Datalogger
Overview
The SDL300's metal vane sensor rides on a low-friction ball bearing at the end of a 39 in (1 m) cable and provides 2% velocity accuracy. The meter displays air velocity and temperature simultaneously on a large 9999-count backlit LCD, and computes air volume in CFM and CMM.
A built-in SD card datalogger date/time stamps up to 20 million readings on a 2 GB card at sampling rates from 1 to 3600 seconds, in addition to 99 manually stored readings. A Type K/J thermocouple input extends temperature measurement to 2372 °F (1300 °C).
Features
- Air velocity 0.4 to 35 m/s (60 to 6900 ft/min), ±2% reading
- SD card datalogging in Excel-compatible format
- Sampling rate adjustable from 1 to 3600 seconds
- 99 manual readings plus 20 million readings via 2 GB SD card
- Type K/J thermocouple input to 2372 °F (1300 °C)
- Metal vane on 39 in (1 m) cable, withstands 158 °F (70 °C)
- 9999-count backlit LCD shows velocity and temperature simultaneously
- Record/Recall MIN, MAX, data hold and auto power off
Applications
- HVAC and ventilation air balancing
- Duct and diffuser velocity traverses
- High-temperature air flow and temperature measurement with thermocouple probes
What's in the Box
- SDL300 thermo-anemometer/datalogger
- Metal vane sensor with 3.9 ft (120 cm) cable
- SD card
- 6 x AA batteries
- Hard carrying case
Extech SDL300 Thermo-Anemometer Datalogger Technical Specifications
| Air velocity range | 0.4 to 35 m/s (60 to 6900 ft/min; 0.7 to 78.2 mph) |
|---|---|
| Air velocity accuracy | ±(2% rdg + 0.2 m/s); ±(2% rdg + 40 ft/min) |
| Air temperature range | 32 to 158 °F (0 to 70 °C) |
| Air temperature accuracy | ±1.5 °F / 0.8 °C (below 60 °C) |
| Type K temperature | -100 to 1300 °C, ±(0.4% + 1 °C) |
| Type J temperature | -100 to 1200 °C, ±(0.4% + 1 °C) |
| Air volume | CFM and CMM ranges up to 99,999 with area input |
| Sensor | Metal vane, 2.8 in (72 mm) head on 39 in (1 m) cable |
| Data logging | 1 to 3600 s sampling; 99 manual + 20 million readings on 2 GB SD card |
| Operating temperature | 32 to 122 °F (0 to 50 °C) |
| Power | 6 x AA batteries (or optional AC adapter) |
| Dimensions | 7.2 x 2.9 x 1.9 in (182 x 73 x 47.5 mm) |
| Weight | 17.2 oz (487 g) |
Manufacturer information: SDL300 on extech.com.
Price $296.00 USD as listed on 05 Nov 2026. Request a firm quote: https://na.indomultimeter.net/products/extech-sdl300-thermo-anemometer-datalogger-sd-card-recording
Shipping. We ship worldwide. See the shipping policy.
Documents. Instruments ship with calibration documentation traceable to national standards. Some models, such as the Mensor CPG2500, also ship with an A2LA accredited ISO/IEC 17025 certificate.
Warranty. See the warranty policy.
Before you order
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Do you provide calibration certificates?
Instruments ship with calibration documentation traceable to national standards. Ask in your request if you need a specific certificate.
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By card or by bank transfer. We can send a proforma invoice for your purchasing department.
Do you ship to my country?
We ship worldwide. Put your destination country in your enquiry and we confirm delivery with your quote.
What if it arrives defective, damaged or wrong?
You get a 30-day money-back guarantee for items that arrive defective, damaged or wrong. See the refund policy.
