• Usually ships in 3-5 business days



  • Adjustable data sampling rate: 1 to 3600 seconds
  • Data Hold plus Auto power off with disable function
  • Large backlit LCD display
  • Built-in PC interface

What's in the Box

  • 6 AA batteries
  • SD card
  • Carrying case
  • Humidity/Temperature probe


The Extech SDL500 Hygro-Thermometer records data on an SD card in Excel® format for easy transfer to a PC for analysis. The SDL500 can store up to 99 readings manually and 20M readings via 2G SD card. The SDL500 has type J and K thermocouple types for high temperature types.