Skip to content
Free Assembly & Local Delivery Up To 65km From Our Ottawa Store On Orders Over $699*. Free Shipping Over $999*
Free Assembly & Local Delivery Up To 65km From Our Ottawa Store On Orders Over $699*. Free Shipping Over $999*

Thermoworks Thermapen ONE THS-235

SKU THS-235-477
Original price $130.98 - Original price $130.98
Original price $130.98
from $149.99
Current price $149.99

Color: Black

Fast Shipping from Ottawa, Ontario

Usually shipped in 2 to 5 Business Days

With full readings in ONE second or less, Thermapen ONE approaches the speed of thought—allowing you to focus exclusively on the quality of your work. Never has an instrument been able to achieve such speed and accuracy without sacrificing durability and usability...until now.

With a newly designed battery compartment for easier access to the user settings and all the amazing features you loved in the Thermapen Mk4—auto-rotating display, motion-sensing sleep and wake mode, waterproof to IP67, NIST-traceable calibration certificate—you'll need to get ONE for yourself to understand the power of sub-second performance.


  • 5-Year Warranty
    The newly designed rugged, waterproof case features a 5-year warranty against defects.
  • Accuracy
    ±0.5°F (±0.3°C) from -4 to 248°F (-20 to 120°C) otherwise ±1.8°F (±1.0°C)
  • Battery
    1.5 volt AAA, 2,000 hours typical (without backlight)
  • Brighter Backlight
    The automatic backlight is brighter and the light sensor is more sensitive to changes in ambient lighting conditions.
  • Display
    1 H x 1.54 W inches (25 H x 39 W mm) LCD, rotates 360°, Intelligent Backlight
  • More Accurate
    With an improved accuracy spec of ± 0.5°F (± 0.3°C), you’ll know your lightning fast Thermapen ONE readings are always accurate, as well.
  • ONE. Second. Readings.
    Thermapen ONE almost moves at the speed of thought...allowing you to focus exclusively on the quality of your work.
  • Operating Range
    –4 to 122°F (–20 to 50°C), max ambient limits of Thermapen body
  • Probe
    4.3 L inches, High Performance Type K Thermocouple
  • Range
    -58.0 to 572.0°F (-49.9 to 299.9°C)
  • Resolution
    Factory set to 1° (user reconfigurable to 0.1°)
  • Response Time
    Full reading in 1 second (0.2 seconds time constant)*
  • Sleep Mode
    10 to 180 seconds, user selectable (user reconfigurable to disable)
  • Water Resistance



Product Depth (in)0.74

Product Width (in)6.1

Product Height (in)1.7

Product Net Weight (lbs)1


Packaging Weight (lb)1.0 lb


Specification SheetOpen PDF Specification Sheet

Product ManualOpen PDF Product Manual


Thermoworks 5 Year Warranty

Most ThermoWorks instruments carry a two-year warranty and guarantee against defects in either components or workmanship. A few have five-year warranties. All other products are covered by a one-year warranty. During this period, products that prove to be defective will, at the discretion of ThermoWorks, be either repaired or replaced, without charge. This warranty does not apply to probes, where a six-month period is offered. The six-month period may also apply to a probe where it is an integral part of an instrument.