Extech SDL900 AC/DC Magnetic Field Meter/Datalogger

  • Measure up to 3000 mT / 30,000 G (DC) or 1500 mT / 15,000 G (AC)
  • Datalogger with adjustable sampling rate (1 to 3600 seconds)
  • Automatic temperature compensation, north/south pole indication & more
More Info
inc VAT £502.80 ex VAT £419.00
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Product Details

Extech SDL900 AC/DC Magnetic Field Meter/Datalogger

This tester measures and datalogs both AC and DC Magnetic Field in Gauss and mT (milli Tesla). it has a uniaxial Hall effect sensor with built-in automatic temperature compensation (ATC) for improved accuracy. The Extech SDL900 AC/DC Magnetic Field Meter/Datalogger is perfect for testing and logging data from power lines, batteries, microwaves, fridges, elevators and more.

Capable of measuring magnetic fields up to 3000 mT / 30,000 Gauss (DC) or 1500 mT / 15,000 Gauss (AC), the Extech SDL900 comes with an SD card as standard, allowing you to log data for prolonged measurements over a period of time. Users can adjust the sampling rate (1 to 3600 seconds), leaving this Gauss Meter to log before transferring the data to PC. All records are time and date stamped for ease and can easily be exported in CSV format (Excel).

With north/south pole indication, a zero button for DC measurements, MIN/MAX and data hold functionality, the Extech SDL900 is a versatile instrument suitable for a range of situations.

Extech SDL900 Key Features

  • Measure magnetic fields up to 3000 mT / 30,000 G (DC) or 1500 mT / 15,000 G (AC)
  • Uniaxial Hall effect sensor with automatic temperature compensation (ATC)
  • Datalogging with adjustable sampling rate from 1 to 3600 seconds
  • Automatically date and time stamps records
  • Suitable for export in CSV format (Excel)
  • North / south pole indicator
  • Zero button for DC measurements
  • Data hold function
  • MIN/MAX measurements
  • Automatic power off function
  • RS232 interface with optional software
What's In The Box?
  • Extech SDL900 AC/DC Magnetic Field Meter/Datalogger 
  • Uniaxial Magnetic Probe Sensor
  • Protective Cover
  • SD Memory Card
  • Universal AC Adapter with Multi-Plugs (US, EU, UK, AUS)
  • 6 x AA Batteries
  • Hard Carrying Case
More Information
Parameter Range Max Resolution Basic Accuracy
DC Milli Tesla 300.00mT 0.01mT ±(5%+10d)
3000.0mT 0.1mT ±(5%+10d)
DC Gauss 3000.0G 0.1G ±(5%+10d)
30,000G 1G ±(5%+10d)
AC Milli Tesla 150.00mT 0.01mT ±(5%+20d)
1500.0mT 0.1mT ±(5%+20d)
AC Gauss 1500.0G 0.1G ±(5%+20d)
15,000G 1G ±(5%+20d)



  • Number of Axis: Uniaxial
  • AC Bandwidth: 50Hz/60Hz
  • Sampling Rate: 1 to 3600 seconds
  • Datalogging: Log readings on SD card (included)
  • Dimensions: 182 x 73 x 48mm (7.1 x 2.9 x 1.9")
  • Weight: 303g (10.7oz)
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pdf Extech SDL900 Datasheet pdf 246.5 KB Download