KELLER Pressure Japan 日本支社 Official site

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!

How do differential pressure sensors work, and how do they differ from other sensor types? Gauge pressure and absolute pressure sensors have defined reference points for measuring pressure differences (for absolute pressure: absolute vacuum; for gauge pressure: atmospheric pressure). In contrast, differential pressure sensors measure the difference between two pressures without defining a reference point. Differential pressure sensors can be constructed in various designs, one feature of KELLER Pressure's products is that there are types that can use liquid at both ports (e.g., model PD-33X). They can measure differential pressure with high resolution. There are also sensors that use two absolute pressure measurement cells to measure two pressures and calculate the differential pressure through electronic circuits (model PD-39X). This structure is particularly suitable for high-pressure applications. Typical applications of differential pressure sensors: 1. Flow measurement There are several methods for measuring flow, but one common method is differential pressure measurement through an orifice plate. 2. Level measurement of liquefied gas tanks Liquefaction reduces volume, allowing for transportation and storage. Why is differential pressure measurement suitable for this level measurement? For more details, please visit the URL below!

Pressure peaks in closed systems can cause significant damage and are complex phenomena. But what exactly is a pressure peak? How does it occur, and how can we protect the system from pressure peaks? We will explain the role of precise measurements in ensuring the safety and efficiency of pressure systems. 1. What is a pressure peak? Why does it occur? The physical principles behind the phenomenon are Newton's three laws of motion and Bernoulli's principle. What causes water hammer and cavitation, and what are their effects? 2. Preventive measures Using simulations, protective components such as pressure dampers, pressure reducers, and check valves, as well as pressure sensors. 3. Why are pressure sensors necessary to protect the system from pressure peaks? Continuous monitoring with sensors allows for real-time recording of pressure peaks and can trigger automatic responses such as valve opening and closing. In the event of a failure of system components or protective devices, it can not only be directly detected but also prevented. Alarms can be automatically sent to responsible personnel via email, IoT, cloud, etc., in case of anomalies. For more details, please refer to the related links below!