Zero Wear Sensation! Helmet-Mounted Heatstroke Sensor 'Netsi'

Tanizawa Manufacturing Co., Ltd. (Headquarters: Chuo-ku, Tokyo; President and CEO: Kazuhiko Tanizawa) has developed a helmet-mounted heatstroke sensor called 'Netsi (Nessy)' and will make its first public appearance at the '8th International Construction & Surveying Exhibition (CSPI2026)' held at Makuhari Messe starting June 17.

'Netsi' is a heat stress countermeasure support device designed to be attached inside helmets.
It estimates the rise in core body temperature from the forehead area and notifies the wearer via vibration when preset thresholds are reached. It supports early detection of physical changes in workers at construction, manufacturing, logistics, and other sites where helmets are required.

In recent years, amid increasingly severe summers and growing demands for improved heatstroke prevention in workplaces, various measures such as WBGT monitoring, hydration management, and rest scheduling have been implemented on-site.
However, heatstroke-related workplace accidents still occur annually.
A key underlying issue is that workers often fail to notice their own physical changes—a characteristic challenge of heatstroke.
Even when their condition begins to deteriorate, workers may think 'I'm still fine' and continue working.
Surrounding colleagues may also fail to notice these changes, and it is difficult for supervisors to constantly monitor each worker's condition.
'Netsi' was developed specifically to address these on-site challenges by supporting 'early awareness of physical changes.'

Netsi Logo
Helmet-Mounted Heatstroke Sensor 'Netsi'

■ A New Perspective on Heat Stress Prevention

Traditional heat stress prevention has primarily focused on managing the work environment.
However, even under the same conditions, risks of physical deterioration vary based on age, health, and daily condition.
Tanizawa Manufacturing believes it is essential not only to manage heat but also to focus on individual worker changes.
'Netsi' promotes actions such as hydration and rest by alerting users to physical changes they might otherwise overlook.

■ Why a Helmet-Mounted Design?

Since its founding in 1932, Tanizawa Manufacturing has supported worker safety primarily through industrial helmets.
Our goal has never been to create high-performance devices, but rather to build systems that 'can be continuously used on-site.'
No matter how advanced a device is, if workers forget to wear it, forget to bring it, or stop using it, it cannot function as a safety measure.
That’s why we focused on helmets—worn daily at worksites.
'Netsi' attaches to the forehead area of the helmet’s headband, so it does not obstruct vision or interfere with work. Its ability to be adopted without requiring new wearing habits is also a key feature.
As a helmet manufacturer, we believe daily-worn helmets can serve as a new foundation for safety measures.

Helmet Mounting Concept

■ Toward Data-Driven Safety Management

'Netsi' supports not only individual awareness but also overall site safety management.
By analyzing data accumulated over a season, it becomes possible to identify time periods with frequent alerts and trends across different sites.
It also allows verification of core body temperature trends when health issues occur.
Rather than relying solely on experience and intuition, 'Netsi' supports continuous improvement of safety measures through data utilization.
Leveraging the expertise gained as a protective equipment manufacturer, Tanizawa Manufacturing is committed to creating an environment that enables 'early detection of changes' rather than 'reacting after accidents occur' in heat stress prevention.

■ Exhibition Details

Exhibition Name: 8th International Construction & Surveying Exhibition (CSPI2026)
Dates: Wednesday, June 17 – Saturday, June 20, 2026
Note: General public admission only on Saturday, June 20
Venue: Makuhari Messe
Booth Number: 25-01
Official Website: https://cspi-expo.com/
Note: Please issue and print your admission ticket via the pre-registration form on the website.

■ Company Overview

Company Name: Tanizawa Manufacturing Co., Ltd.
Headquarters: 2-15-5 Shintomi, Chuo-ku, Tokyo
Founded: 1932
Business: Manufacturing and sales of safety protective equipment including industrial, disaster-preparedness, and bicycle helmets
Website: https://www.tanizawa.co.jp/
Inquiries regarding 'Netsi': Sales Promotion Department, Sales Division (TEL: 03-3552-8322)