Thermapen ONE Purple

Thermapen ONE moves almost at the speed of thought... so you can focus solely on the quality of your work.

More Accurate

With an improved accuracy specification of ± 0.5 °F (± 0.3 °C), you know your lightning-fast Thermapen ONE readings are always accurate.

Brighter Backlight

The automatic backlight is brighter and the light sensor is more sensitive to changes in ambient light.

5-Year Warranty

The newly designed robust, waterproof case comes with a 5-year warranty against defects.

Featuring a newly designed battery compartment for easier access to user settings and all the great features you loved in the Thermapen Mk4.

• automatically rotating display
• motion-sensitive sleep and wake mode
• waterproof to IP67
• NIST-traceable calibration certificate

You need to buy ONE for yourself to understand the power of performance in under one second.

• Range: -58.0 to 572.0°F (-49.9 to 299.9°C)
• Accuracy: ±0.5 °F (±0.3 °C) from -4 to 248 °F (-20 to 120 °C)
• Resolution: Factory set to 1° (user configurable to 0.1°)
• Response Time: Full reading in 1 second (0.2 second time constant)*
• Probe: 4.3 L inch, High Performance Type K Thermocouple
• Display: 1 H x 1.54 W inch (25 H x 39 W mm) LCD, 360° rotatable, Intelligent Backlight
• Sleep Mode: 10 to 180 seconds, user selectable (user configurable to disable)
• Water Resistance: IP67
• Operating Range: –4 to 122°F (–20 to 50°C), maximum ambient limits of Thermapen case
• Battery: 1.5 volt AAA, 2,000 hours typical (without backlight)
• Dimensions: 6.1 L x 1.7 W x 0.74 D inch (156 L x 48 W x 19 D mm)
• Weight: 115 g
• Warranty: 5 years
• Certificate: Includes NIST-traceable calibration certificate

* Response time defined as five time constants for 99.3% of the actual temperature.