Extech TM20 Temperature Indicator

Not in stock. Usually ships in 3-5 business days [?]

Need Help? Call 1-800-884-4967
Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET


  • ±1.8°F/1°C basic accuracy
  • 0.1° max resolution
  • Temp range: -40 to 158°F (-40 to 70°C)
  • Fast response sensor (liquids, semi-solids, air)
  • Audible and visual alarm
  • Displays Min/Max reading with reset function
  • Data hold freezes current reading on display
  • Low battery indication
  • Designed to meet IP65

The Extech TM20 Temperature Indicator can be used on desktops with its removable foot stand or can be mounted on wall or metal surfaces with its magnetic back. Choice of model with standard probe or long penetration probe. The audible and visual alarm alerts when the temperature level is higher or lower than the user programmed high/low set points. The fast response sensor measures temperature in liquids, semi-solids, and air. The LCD displays temperature reading, alarm indicator and high or low alarm icons.

Applications for the Extech TM20 Temperature Indicator include:

  • Laboratories
  • Clean rooms
  • Refrigerator
  • Freezer
  • Shipping vans
  • Shipping crates
  • Cargo vessels
  • Storage areas
  • Warehouses
  • and more


This product can be used in the following applications: