A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

At Tozuda, we design head impact sensors to raise concussion awareness, indicate potential injury, and emphasize proper precautionary measures to aid injury recognition.

Tozuda sensors allow you to make safety a priority and keep your focus on the tasks that demand it. Ease your concussion worries in the activities you enjoy everyday. Our sensors are affordable, simple, objective, and versatile—ideal for any sport, commute, job-site, or service. All you have to do is remember our simple motto:

At Tozuda, we manufacture head impact sensors with you, our user, in mind.

You don’t want complicated, so we made it simple. Just attach the sensor on to any helmet or headgear, and it will indicate when a sustained impact is potentially concussive. Easy to attach and easy to read, you’ll be sure to know when you need to take action.

You don’t want expensive, so we made it affordable. Eliminating electronic parts in our sensors makes sense for us both; we reduce costs by using only mechanical parts, and simplify the process by removing batteries, wifi, and charging from the equation. Additionally, our sensors can help you identify a concussion faster, saving you from spending more on medical costs and other indirect expenses that arise.

You don’t want a hidden injury, so we made it clear and tamper-proof. Tozuda sensors can’t be concealed, covered, or changed; indicating objectively and reliably when you should be assessed for a head injury. Our sensors are transparent by design—encouraging users, athletes, and coaches alike to be transparent about the severity of every impact sustained and the reality of traumatic brain injuries.

A Traumatic Brain Injury, or TBI, can devastate a career or an entire community, yet the stigma of these injuries can sometimes keep victims from speaking up or seeking help. Safety shouldn’t hold you back, and Tozuda sensors won’t. We created our sensors to fit onto any helmet and into any routine—giving you piece of mind without hindering your hustle. This means you can keep your focus on what matters, and spend less time bracing for a TBI.

CONCUSSIONS AND LOSS OF CONSCIOUSNESS—It is widely believed that concussions and TBIs must involve a loss of consciousness; however this is one of the main misconceptions that leads to delayed or missed diagnoses. The University of Pittsburgh Medical Center reports that more than 90% of concussions are not accompanied by a loss of consciousness. UPMC’s research also indicated that concussions diagnosed without a loss of consciousness could lead to longer recovery periods, compared to those whose concussions did involve unconsciousness.

CONCUSSION PROBABILITY—Research from the Department of Orthopaedics at Brown University details concussion probability based on the varying G forces of more than 161,000 tested collisions. According to this data, an impact with a measured acceleration of 75 Gs has a 50% chance of causing a concussion in adults. Tozuda sensors activate at 85 Gs; for adults, this would indicate a 60% likelihood of concussion.

SECOND IMPACT SYNDROME—While concussions can be damaging, second-impact syndrome is exponentially more dangerous. Second-impact syndrome, or SIS, occurs when one sustains a second concussion before an initial concussion has healed. SIS causes the brain to swell suddenly, and with devastating consequences. The majority of cases are fatal, and of the few survivors, most are left seriously disabled. With SIS, time between concussions can range from minutes to weeks; this is why it is so important to wait to return to play until a concussion or brain injury can fully heal.

SENSE—Tozuda sensors can detect forces in any direction within milliseconds of impact. Concussions occur when an impact to the head or body causes the brain to move inside of the skull; most concussions and traumatic brain injuries are caused by rotational and linear forces. Tozuda sensors withstand regular helmet use and minor impacts, but can detect when a hit is potentially concussive, such as a direct blow to the helmet, or a rotational hit which causes the head or neck to twist.

ACTIVATE—Our sensors are mechanically activated when linear or rotational accelerations exceed the threshold of 85 Gs of force. This trigger point was determined using data from the Department of Orthopaedics at Brown University which found that impacts of 75 Gs were 50% likely to be concussive. Direct contact and impact from inertial forces trigger the sensor to activate, meaning the sensor can detect concussive hits even when the head isn’t struck. Once activated, Tozuda sensors release a simple, non-toxic mix of liquid and dye, changing in color from clear to red.

INDICATE—Tozuda sensors measure the force of an impact and indicate when an athlete should be evaluated before returning to the field—no sensor on the market today is able to fully detect or prevent concussions. This allows users to clearly identify when an impact is especially dangerous–exceeding 85 Gs–and prevents users from exacerbating an injury when they might not even know they have one. With the ability to alert users of major linear and rotational forces, the sensors can clearly and reliably indicate a potential concussion, even when other symptoms aren’t present.

SIMPLE—Tozuda sensors are easy to use and understand—with a straightforward attachment process and clear activation, our sensors make it obvious when you need to take action.

AFFORDABLE—Thanks to Tozuda’s patented technology, our uniquely designed sensors function reliably without the use of electronics, which keeps costs low for everyone.

OBJECTIVE—The sensors’ unambiguous indicator keeps athletes and coaches accountable about the severity of each and every impact. Anyone can intervene when a sensor has been activated, including teammates, coaches, referees, and even opponents.

VERSATILE—Our sensors’ versatile design brings safety and a sense of security to any setting—not only on helmets in sport, but also on hard hats in construction, or other headgear protecting you while on duty.

For those who are hard-headed like us, we know how difficult it can be to sit yourself out when you want to keep going. It isn’t easy to admit an injury, but denying a concussion can lead to extended symptoms and healing time, increased risk for further complications, and even death. As our founder Jessie puts it: “would you rather sit out the game or the season?” Our sensors give users the information they need to make informed decisions to protect their heads. By purchasing or gifting a head impact sensor, you can help spread concussion awareness and encourage others to take note.

At Tozuda, we design tools to make the world safer. We make impact sensors to bring you peace of mind and alert you when an impact is potentially devastating, no matter the setting. Our team, fueled by the passion of our founder Jessie Garcia since 2015, aims to raise concussion awareness and help reduce the frequency of traumatic brain injuries and the severity of their impacts. Tozuda is based in Philadelphia and brings visibility to concussion awareness around the world. Our name, Tozuda, means hard headed (in a determined way!) and epitomizes our mission—to encourage you to STAY TOZUDA and never lose sight of your goals, no matter what gets in your way.

At Tozuda, we see the value in participating in sports and recreational activity—physically, mentally, and socially. Some of our fondest memories come from playing! Our goal is to continue encouraging sports participation while raising awareness of this one specific injury, concussions. Concussions are something to take seriously, the key to successful recovery is recognition and proper treatment. That is why we plan to:

Educate on the dangers, signs, and symptoms of TBIs and concussions



Emphasize prevention and prioritizing safety to reduce the frequency of sustained brain injuries

Encourage users to get medical attention when needed and to prioritize the brain’s wellness along with the body's health

To contact our team, send us an email at info@tozuda.com.

For wholesale opportunities, contact John Pettit at jpettit@tozuda.com.

For media inquiries, contact Katie Burger at katie.burger@tozuda.com.

Additional information can be found in our press kit or on our press page.