Three Ways to Order Your Science Supplies

Online - Pay by credit card, check or your account.

By Phone - Call us at 800.628.7748
Mon.- Thurs. 7:30 -4:00 pm EST, Fri.7:30-3:00 EST


By Fax - Fax your order with our
pdf form.

Waterproof Thermometer


The Extech 39240 is a pocket-size, waterproof stem thermometer with digital LCD display.


  • °C/°F switchable ranges of -40 to 392°F (-40 to 200°C)
  • MAX/MIN recall of high and low temperatures
  • Data hold and auto power off
  • Digital display with 0.1° resolution
  • 2-3/4" stainless steel stem


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