[Heat Stroke Obligation Measures] WBGT Warning × Recording × Notification! Watchful-kun PRO
Heatstroke prevention measures made mandatory! An IoT warning system that measures and records WBGT, ensuring visibility and notifications to protect the workplace.
In 2025, due to system reforms, the understanding and response to WBGT values (heat index) have become mandatory for all businesses. "Miharukun PRO" is an IoT solution that visualizes heat stroke risks at work sites, provides immediate warnings, and saves records. 【This product solves the following issues】 ✔ Heat measures at the site are subjective and vague ✔ WBGT values for each site are not being monitored ✔ Warnings are not noticeable, and employees may not be aware ✔ Records are not kept, making management and reporting difficult 【Main features of Miharukun PRO <WD100-ENV-LCD>】 ✔ Automatically measures, displays, and records WBGT, temperature, and humidity ✔ Excellent visibility with three-color lights + LCD display (green, yellow, red) ✔ Blinking and email notifications for threshold exceedance → Immediate response possible ✔ Can connect up to 32 child units with one parent unit ✔ Communication via LoRa wireless (long-range, low power, resistant to obstacles) ✔ High-visibility large display warns the entire floor ✔ Log storage can be used for compliance with regulations and report creation
basic information
For details on specifications and features, please check the official ISA website: Here is the official ISA product page: https://isa-j.co.jp/info/miharu/
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Model number/Brand name
Watchful-kun PRO <WD100-ENV Series>
Applications/Examples of results
With the mandatory implementation of WBGT monitoring and heatstroke prevention measures on-site, there is an urgent need to introduce a system that can be operated immediately. "Miharukun PRO" can be installed in various locations within factories, warehouses, and buildings, ensuring reliable alert notifications even across extensive floors. 【Practical Examples】 - Safety management for construction sites and warehouse operations in hot environments - Automatic WBGT monitoring in factory floors without air conditioning - Establishing a management system that responds promptly to revisions in labor safety and health regulations - Promoting proactive behavior among workers with a highly visible LCD display - Utilizing log data for report submissions and risk management
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| Model number | overview |
|---|---|
| WD100-N32/N32 | Data collection communication control server (master unit): LoRa wireless communication standard, line of sight approximately 11 km, communication possible up to about 3 km in dense areas. |
| WD100-ENV-LCD | Watchful-kun PRO <Model with LCD> |
| WD100-ENV | Kibaru-kun PRO <Model without LCD> |
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News about this product（2）
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Transitioning heatstroke measures in schools and special support schools from 'manual management' to 'automated monitoring' - Recruitment for free demonstration monitors of the WBGT remote monitoring system 'Miharu-kun Pro' has begun (Note: Recruitment for summer 2026 has closed).
ISA Co., Ltd. (abbreviated as ISA, located in Shinjuku, Tokyo, President: Koji Yanagihara) has started recruiting free demonstration monitors for its environmental monitoring system "Miharukun Pro," which enables remote centralized management of WBGT (Wet Bulb Globe Temperature) to reduce the burden of heatstroke measures and strengthen safety management systems in schools and support schools. (※Due to a large number of applications, the recruitment for summer 2026 has been closed.) In the demonstration, the installation locations will be considered based on the operational conditions of various facilities such as classrooms, gymnasiums, schoolyards, and pools. The effects of visualizing environmental data, raising awareness through warning lights and email notifications, and reducing the burden of confirmation for teachers and staff will be confirmed. Through actual operation in school settings, it can contribute to the standardization of heatstroke measures, the acceleration of decision-making, and the efficiency of information sharing, thereby improving safety management systems.
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Immediate response to the "Heat Stroke Warning Alert"! Urgent proposal of heat stroke prevention products that can be used on-site right now.
In response to the "Special Heat Stroke Warning Alert" and the "Mandatory Heat Stroke Measures" that began full-scale operation in June 2025, we are reintroducing our IoT heat stroke countermeasure solutions. The target products are the three series: "Meru Maru-kun + Heat Stroke Alert," "Miharukun PRO," and "Momoko and Ayaka." With this system revision, heat stroke measures have changed from "effort obligations" to "obligations" for all businesses employing workers. As measures are required across all industries and sites, including government agencies, educational institutions, welfare facilities, distribution, and construction, ISA supports the creation of a safe and secure environment through existing products that can be operated immediately. ■ Introduction of three heat stroke countermeasure products (1) Meru Maru-kun + Heat Stroke Warning Alert Email Distribution Service (2) Miharukun PRO (WBGT compatible model) (3) Momoko and Ayaka Environmental Monitoring Solution (environmental monitoring, recording, alerts) ◆ Main industries and achievements of implementation Local governments (offices, evacuation centers, nurseries) Educational institutions (playgrounds, gymnasiums, classrooms) Medical and welfare facilities (nursing homes, disability support facilities) Distribution and construction industries (warehouses, job sites, delivery hubs) General companies (reception areas, warehouses, employee break rooms)
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At ISAI, we offer a range of monitoring solutions including network warning lights (Keiko-chan / Meru Maru-kun), network monitoring, contact monitoring, PDUs, and network UPS, as well as IoT solutions for agriculture, distribution, factory automation, food, pharmaceuticals, education, and healthcare utilizing LoRa wireless communication. In the UNIX era of the 1990s, we developed an automatic shutdown device as a countermeasure for shutdown processing troubles. Subsequently, we focused on the development of network-related devices centered around Embedded Linux, and in the 2000s, we announced various networked devices and integrated management solutions. Even now, through unique products such as intelligent UPS, network warning lights, and LoRa wireless-enabled sensing systems, we provide advanced technology in a safe and easy-to-use manner, contributing to the enhancement of IT infrastructure. Additionally, ISAI leverages its achievements in server power management and automated system operations in large-scale core systems to offer a wide range of system operation technologies, including remote monitoring, equipment control, and the operation, monitoring, and management of power supplies (including UPS) via network.