• Chef's knife with a white handle on a white background
  • White knife with a silver blade on a white background
  • Close-up of a white electronic chef knife with an orange button on a light gray background
  • Knife with a white handle on a white background
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C-200 Ultrasonic 8" Chef's Knife

C-200 Ultrasonic 8" Chef's Knife

The C-200 is the world’s first ultrasonic chef’s knife, designed specifically for home cooks. You can’t see the blade move, you can’t hear it when it’s on, and you can’t feel any vibration in the handle. But when you press the orange button, the knife cuts with up to 50% less effort, with less sticking, and easier cleanup. When it’s on, the blade vibrates over 30,000 times a second, making the knife behave sharper than it physically is. Made from Japanese AUS-10 steel hardened to 60HRC, it’s a great knife when it’s off, too.

Specifications:

  • Blade length: 200mm (8")
  • Steel: Japanese AUS-10 in three layer (san mai) construction.
  • Hardness: 60HRC 
  • Edge angle: 13 degrees per side (26 degrees inclusive)
  • Battery: 1100mAh removable lithium-ion battery pack
  • Charging: USB-C, or with the Wireless Charging Tile
  • Water resistance: IP65
  • Operating frequency: 33kHz
  • Operating power: 10W
  • Includes: C-200 Ultrasonic Knife, removable Li-ion battery pack, user manual
  • To avoid e-waste, USB-C cable and charger not included.
$399.00
$399.00 $399.00
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Pre-Order now for estimated shipping by March 2026 (Batch 2). Cancel anytime before your order ships. What is a Pre-Order?

FAQ's

Warning: This product can expose you to lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov. What does this mean?

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  • Robotic arm cutting a tomato and a graph of the forces exerted during cutting showing a 50% difference between the ultrasonic knife on and off

    Easier cutting

    When the knife is on, it cuts with up to 50% less force. We measured... with a robot.

  • Close up of ultrasonic knife blade tip showing construction of Japanese san-mai three layer steel

    Japanese steel

    It’s a great knife even when it’s off. The blade is made from san-mai or “three layer” Japanese AUS-10 steel with a hard, inner core that holds an exceptionally sharp edge.

  • Simple charging

    When it’s time to recharge the battery, all you need is a USB-C cable.

The Wireless Charging Tile (sold separately) keeps your battery topped up so you’re always ready for action. The tile is milled from solid mahogany and keeps your blade edge protected when not in use. It can live on your counter, in a drawer, or wall-mounted with no cords and no drilling required. 

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Press

  • "Seattle Ultrasonics C-200 knife review: a powered knife even a pro chef can love. 4 out of 5 stars"

    The Guardian  

  • "I was skeptical, but I sliced through a tomato with almost no resistance at all — it felt like the knife was falling through."

    The Verge  

  • "OMG this knife is incredible!!!!"

    IJustine  

  • ”It might just be the best new product I’ve tried all year.”

    Delish  

  • "It could genuinely alter the course of the industry forever."

    Gear Patrol  

  • "…The knife feels almost nonstick, as the vibrations — created by PZT-8 piezoelectric ceramic crystals — keep food from clinging to the blade"

    Uncrate  

  • "From stubborn tomato skins to tough root vegetables, the C-200 aims to turn kitchen prep from physical work into effortless precision."

    CNET  

  • "While Heimendinger’s knife still features a great piece of sharp Japanese san mai AUS-10 steel, it’s the handle that does the heavy lifting, with electronics that produce more than 40,000 vibrations per second, making the knife behave sharper than it physically is."

    Geek Wire  

  • "The Seattle Ultrasonics C-200 chef's knife is an ultra-advanced piece of equipment for at-home chefs to incorporate into their preparation routine that will greatly reduce their effort, while also increasing their cutting capabilities."

    Trend Hunter  

  • "Seattle Ultrasonics has designed the world's first ultrasonic chef's knife for home cooks, dubbed the C–200. …despite only being announced this week, the knife has already garnered huge attention on social media."

    Daily Mail  

  • "The C-200 pairs traditional craftsmanship with ultrasonic technology for smoother, cleaner cuts."

    Seattle Mag  

FAQ

What generates the vibrations in the C-200?

The C-200 doesn't use any vibrating motors or magnets to generate its ultrasonic vibration. Instead, it uses PZT-8 piezoelectric ceramic crystals. This engineered ceramic material expands very slightly in one direction when an electric current is applied. In the C-200, these crystals make the blade resonate at ultrasonic frequency while directing energy into the blade rather than the handle.

Can you feel any vibration in the handle during use?

No - you won't feel the vibrations in your hand. Unlike, say, an electric toothbrush, the ultrasonic vibrations are not detectable in the handle and are isolated to the blade.

Is the battery removable?

Yes, the C-200's battery is user-removable. With the knife off and pointed away from you, grip the handle firmly with one hand while pulling the battery pack straight out to remove it.

Is an ultrasonic knife safe?

Yes. An ultrasonic knife isn't inherently more dangerous than any other sharp kitchen knife. You still have to be careful (it is a sharp blade!), but the C-200 can make cutting safer because you use less force and maintain more control than using a dull knife.