KELLER Pressure Japan 日本支社 Official site

A student team from Delft, Netherlands, is developing a bipropellant rocket powered by hydrogen peroxide. In the search for optimal components, KELLER Pressure became involved. Rockets using hydrogen peroxide as a propellant are not new. However, this fuel method has hardly been used since World War II and the early days of space development. "We wanted to recreate this fuel at a student level, in a low-cost and from-scratch development approach. Initially, the goal was simply to 'get it to fly,' but as we progressed, we evolved to the stage of designing a 'flyable vehicle.'" Two types of KELLER Pressure sensors are being used (M5HB for measuring pressure inside the engine and 7LC for measuring the pressure in the hydrogen peroxide and ethanol tanks). These sensors are lightweight, compact, and have excellent material compatibility. Additionally, the fact that the technical specifications are openly published has been appreciated. All necessary information can be checked on the website, allowing for compatibility assessments without needing to contact the sales representative. Communication after the decision to use the products was also smooth. For more details, please check the related links below!

Many applications today require not only accurate measurements but also fast measurements. In this context, the dynamic behavior of sensors becomes particularly important in addition to measurement accuracy. While the limiting frequency of electronic circuits, sampling rates, or similar parameters are often recognized as decisive factors, this is actually just one aspect, and it is necessary to consider the entire sensor system. How much speed is required from the sensor? What are the factors that truly affect the dynamic characteristics of the sensor? I will explain why not only electronic circuits but the entire sensor design is important. I will introduce typical application examples that require millisecond-level speeds, provide findings from test results, and assist you in selecting the optimal sensor according to your needs. For more details, please refer to the related links below!

It is extremely important to detect leaks as early as possible during the construction phase. In particular, when moisture penetrates walls, floors, and ceilings, it can cause significant damage, much of which is due to leaks from water pipes. Traditional methods such as manual pressure testing and partial visual inspections have their limitations. What is needed is continuous and intelligent monitoring. AWOSSA provides a powerful and autonomous solution for the construction industry through digital leak monitoring. This system detects leaks early and automatically sends alerts, allowing for prevention before costly damages occur. Key features of the system: - Continuous recording and analysis of pressure and temperature data - Real-time leak detection at construction sites - Automatic notifications via email or SMS when set values are exceeded - Intuitive web interface for settings and data analysis How the system works: The sensors continuously monitor throughout the construction period, reliably detecting even slight changes in pressure or temperature. If an anomaly is detected, the responsible personnel are notified immediately. With a built-in battery, it can operate autonomously, and once the system is activated, monitoring begins automatically. For more details, please refer to the related links below!

At the "Innovation Lab" near Keller's headquarters, you can experience the "Sponge City." Keller's rain gauge observation stations equipped with sensors continuously measure and record precipitation. What is a Sponge City? The purpose of a Sponge City is to temporarily store and infiltrate rainwater on-site, processing it in a way that is closer to nature rather than directly draining it away. Soil and plants absorb water like a sponge and later release it through evaporation. This concept models a natural surface that can absorb far more water than paved urban areas. Rain gauge observation points, like those set up in the Innovation Lab, provide crucial data for long-term evaluation of the effects of such urban design. Keller's sensors in action At the Innovation Lab, the water level in areas where rainwater is stored is measured with high precision using the 36XW level gauge. The 36XW can measure not only water level but also water temperature simultaneously. The collected data is transmitted to the cloud via the remote data transmission unit ARC1 and displayed live. Additionally, the ARC1 measures atmospheric pressure and ambient temperature under direct sunlight, allowing for an understanding of the impact of sunlight on plants.

In the field of pressure measurement technology, the type of pressure varies depending on the reference point (reference pressure). 【Absolute Pressure】 In absolute pressure, the process pressure is measured with a vacuum as the reference. In the manufacturing process, the back side (reference side) of the diaphragm within the sensor element is kept in a vacuum and sealed in that state. When atmospheric pressure is applied to the diaphragm, the sensor measures the atmospheric pressure (meteorological atmospheric pressure). All fundamental physical formulas related to pressure are based on absolute pressure data. 【Gauge Pressure】 In gauge pressure, the process pressure being measured is referenced to atmospheric pressure. In other words, it measures the difference between the process pressure and the current atmospheric pressure. Since atmospheric pressure is affected by altitude and weather, it constantly fluctuates. Therefore, for processes where variations from atmospheric pressure are significant, measurements using gauge pressure are appropriate. The back of the measurement cell in gauge pressure sensors always has a vent hole, allowing the sensor element to reference atmospheric pressure within the housing. Gauge pressure is the most common type of pressure measured by pressure sensors and is used in almost all applications and industries. For shielded gauge pressure and differential pressure, please refer to the related links below!