YDKテクノロジーズ List of Products and Services

The "WW4486" is a converter that calculates and outputs flow rate values based on water level. The types of weirs that can be calculated include triangular weirs, rectangular weirs, broad-crested weirs, and partial flumes. It is equipped with a function to absorb abnormal voltages, such as lightning, which are easily induced by connected cables, protecting the internal circuit and preventing interference with the equipment connected to the output signal. 【Features】 ■ Measurement values displayed on the built-in LCD screen ■ Easy to change settings and perform maintenance on-site ■ Lightning protection: 10kV between input signal and case ■ Outputs flow rate values as a 4-20mA DC signal *For more details, please download the PDF or feel free to contact us.

• Converters and Transducers

The "WW4483" is a two-wire transmitter that measures changes in water depth using a semiconductor pressure sensor and converts it into a 4-20mA DC current signal. Using an external air pressure introduction tube built into a dedicated cable, it introduces external air pressure to the transmitter and corrects measurement errors caused by fluctuations in external air pressure. It can be used for water level measurement to calculate flow rates using "weirs" or "partial flumes." 【Features】 ■ Easy maintenance on-site ■ Built-in lightning protection ■ Flow calculations performed by dedicated converter WW4486 *For more details, please download the PDF or feel free to contact us.

• Signal Generator

We would like to introduce the Fis.View environmental server program 'WP9000 series' that we handle. This software processes real-time display of environmental measurement data and image information from Fis, as well as data display, graph creation and editing, and printing. Please feel free to contact us if you need assistance. 【Features】 ■ Number of Fis connection stations: Up to 20 stations ■ Maximum number of recorded elements (as limited by Fis) ・1 minute: 1 to 25 elements ・2 minutes: 1 to 50 elements ・5 minutes: 1 to 125 elements ・10 minutes/15 minutes/20 minutes/30 minutes/1 hour: No limit *For more details, please download the PDF or feel free to contact us.

• Software (middle, driver, security, etc.)

The "WM8800 Series" is a multifunctional converter compatible with Fis networks, allowing for the combination of conversion modules tailored to observation data. It collects and stores observation data from various conversion modules for meteorological and hydrological observations. Additionally, various data can be viewed on a web browser of a computer connected to the network or downloaded via FTP. With the remote maintenance function, it is possible to diagnose equipment failures and change settings, as well as display real-time data, daily reports, daily processing slips, and log information. 【Features】 ■ Maximum of 31 connected conversion modules ■ Data display using a web browser without the need for dedicated software ■ Notifications of equipment anomalies and observation data alarms via email ■ Compatibility with various communication lines using TCP/IP and PPP protocols ■ Automatic clock calibration through connection with radio clocks, GPS clocks, or SNTP client functionality *For more details, please download the PDF or feel free to contact us.

• Converters and Transducers

The E7050 is a meteorological agency certified temperature and humidity sensor for simultaneous measurement of temperature and humidity. It incorporates a temperature detection element using a platinum resistance thermometer and a humidity detection element using a low-power capacitive thin-film sensor, all housed within a naturally ventilated tube. This device can be utilized for meteorological observation, road weather observation, aviation weather observation, and temperature and humidity measurement in industrial fields. 【Features】 - Usable in harsh outdoor environments - Meteorological agency certified temperature and humidity sensor for simultaneous measurement - Low power consumption - Accuracy: - Temperature detection: JIS Class A, ±(0.15 + 0.002|t|)℃ (where |t| is the absolute temperature) - Humidity detection: within ±3% r.h. (at 20℃) *For more details, please refer to the related links or feel free to contact us.

• Thermometer

The E-771 is a unique dew point thermometer that utilizes the hygroscopic conductivity of lithium chloride, indicating resistance values corresponding to the dew point temperature. It can be used for dew point temperature measurement and relative humidity observation in meteorological observations, road weather observations, industrial fields, theme parks, and more. By using a table, you can determine the saturation vapor pressure from the dew point temperature, and if the dry bulb temperature is known, the relative humidity can also be calculated. 【Features】 ■ High-precision lithium chloride type dew point thermometer transmitter for isolation measurement ■ Excellent reliability and stability ■ Easy maintenance ■ Allows determination of relative humidity from dry bulb temperature using a table *For more details, please refer to the related links or feel free to contact us.

• Thermometer

The "E-834" is a ventilation tube for thermometers that protects the sensing part of the E-734 type thermometer when measuring air temperature, while ensuring that the sensing part is always in contact with the surrounding air for observation. The canopy with a fan is designed to be easily detachable while being temporarily held in place by a fixture to prevent it from falling off, making maintenance and inspection simple. The intake features a special louver that assists ventilation during strong winds and prevents the "decompression phenomenon," where air inside the tube is sucked out by crosswinds. 【Features】 ■ Adopted by AMeDAS and highly rated ■ Can be mounted on a steel tower with just one screw ■ Canopy has a double structure ■ Made of corrosion-resistant metal to maintain better condition at all times *For more details, please refer to the related links or feel free to contact us.

• Other measurement, recording and measuring instruments

The "E-734" is a temperature measuring sensor that detects changes in resistance due to temperature variations using a platinum resistance thermometer. It is easy to maintain and handle, features a waterproof structure, and has a long-lasting design using SUS for the protective tube. It can be used for dam meteorological observations, agricultural meteorological observations, atmospheric environmental meteorological observations, road meteorological observations, aviation meteorological observations, and temperature measurements in industrial fields. The detection unit uses a platinum resistance thermometer, which has minimal aging changes and excellent responsiveness. 【Features】 ■ High precision (JIS Class A) temperature measuring sensor ■ Easy to maintain and handle ■ Waterproof structure with a long-lasting design using SUS for the protective tube ■ Meteorological Agency Type Certification No. 93506 *For more details, please refer to the related links or feel free to contact us.

• Thermometer

The "Field μ WM5581-A□" is a data recording device that can be used for recording DC voltage signals and contact pulse signal data. It uses a lithium battery for power, allowing it to perform effectively even in locations without commercial power supply. This compact and high-performance product is designed for long-term unmanned observation in harsh natural environments. 【Features】 ■ Data can be retrieved via USB memory ■ Internal data storage: 4 years of data collection at 10-minute intervals ■ Suitable for research observations withstanding harsh natural environments, featuring battery power and non-volatile memory (no battery backup required) ■ Capable of long-term data recording *For more details, please refer to the related links or feel free to contact us.

• Other measurement, recording and measuring instruments

The "Field μ WM5581-W□" is a compact and high-performance data recording device designed for long-term unmanned observation in harsh natural environments. It uses lithium batteries as its power source, allowing it to perform effectively even in locations without commercial power supply. It can be utilized for backing up meteorological observation data and monitoring groundwater. 【Features】 ■ Data can be retrieved via USB memory ■ No need for a dedicated data retrieval device, allowing for easy data collection ■ Built to withstand harsh natural environments, suitable for survey observations with battery power and non-volatile memory (no battery backup required) ■ Capable of long-term data recording: internal data storage allows for data collection at 10-minute intervals for 4 years *For more details, please refer to the related links or feel free to contact us.

• Other measurement, recording and measuring instruments

The "WW4456-□□2" is a crystal-type level gauge converter that uses specific low-power radio for wireless transmission. In cases where the communication distance needs to be extended or the line of sight cannot be secured due to obstacles, communication is possible up to a maximum of 4 km by using a wireless relay unit. It is suitable for installation in locations where laying cables to the level gauge transmitter is difficult. 【Features】 ■ Communication is possible between the wireless transmission unit and the wireless reception unit over a maximum line of sight distance of 1 km. ■ Communication is possible up to a maximum of 4 km by using a wireless relay unit. ■ Utilizes specific low-power radio. *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce the "Meteorological and Hydrological Observation Instruments" that we handle. From small-scale systems that connect to data loggers for wind direction and speed data, to large-scale systems such as comprehensive meteorological observation devices, we flexibly accommodate various applications. In meteorological observation instruments, we offer "wind direction and speed transmitters" and "wind direction and speed converters," while in hydrological observation instruments, we have products like the "Water Research Type 62 Long-term Self-recording Water Level Gauge" and "Quartz Water Level Gauge." 【Product Lineup (Partial)】 ■ Meteorological Observation Instruments - Anemometer - Rain gauge/wind gauge/visibility meter/road surface condition meter - Temperature and humidity meter - Solar radiation meter - Evaporation meter *For more details, please refer to the PDF document or feel free to contact us.

• Wind Speed/Volume Meter

We would like to introduce our "Road Surface Condition Meter/Road Surface Radiation Thermometer (Road Surface Condition Observation System)." It measures road surface conditions (dry, wet, moist, snow, ice, partially melted snow) non-contactly. Additionally, by combining it with the road surface radiation thermometer, it is possible to measure road surface temperature, air temperature, relative humidity, and more. 【Lineup】 ■WB7731 ■WE7741 *For more details, please refer to the PDF document or feel free to contact us.

• Thermometer

We would like to introduce the "Snow Depth Gauge" that we handle. It is a compact and lightweight laser snow depth gauge. Since it can measure from an angled direction, it is not affected by measurement errors caused by snow falling from the sensing part. Additionally, the human detection device ensures safety and prevents erroneous measurements by detecting the intrusion of people or animals into the measurement area and stopping the measurement. 【Features】 ■ Non-contact measurement of snow surface ■ No mounting arm required due to angled irradiation ■ Easy installation of the detection unit ■ Measurement range of 0 to 6m / Measurement accuracy of ±1cm ■ No need for correction devices such as thermometers *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce the "rain gauge" that we handle. The double structure of the filter prevents observation errors caused by clogging. For cold regions, there are models equipped with heaters to prevent rainwater from freezing. Certification from the Japan Meteorological Agency is available. The outer cylinder and legs are made of highly durable stainless steel. 【Features】 ■ Double structure adopted in the "filter" ■ Improved maintenance ■ Freeze prevention measures implemented at the drainage outlet ■ Enhanced durability *For more details, please refer to the PDF materials or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce the "Anemometer" that we handle. It is compatible with atmospheric environmental observation and starts operating at wind speeds of 0.4 m/s or lower. It can measure wind speeds of up to 90 m/s and can obtain certification from the Japan Meteorological Agency. Additionally, it features a brushless optical encoder, achieving a highly stable transmitter. 【Features】 ■ Compact, lightweight, and high durability - Reinforced plastic is used for the wind turbine, body, and tail. ■ Brushless structure - A brushless optical encoder is adopted, achieving a highly stable transmitter. ■ Certification from the Japan Meteorological Agency - The transmitter can obtain certification from the Japan Meteorological Agency on its own. *For more details, please refer to the PDF document or feel free to contact us.

• Wind Speed/Volume Meter

We would like to introduce our "Ultrasonic Water Level Gauge." This water level gauge is suitable for measuring in rivers with flowing sediment and debris, rivers with frequent bed fluctuations, high water levels, high flow rates, and in corrosive water quality. It comes standard with BCD output compliant with the Ministry of Land, Infrastructure, Transport and Tourism's Telecommunications Specification No. 54, and the measured water level data can be easily retrieved using a USB memory stick. 【Features】 ■ Standard BCD output compliant with the Ministry of Land, Infrastructure, Transport and Tourism's Telecommunications Specification No. 54 ■ Measured water level data can be easily retrieved using a USB memory stick ■ Data recorded in the built-in memory can be printed for specified periods *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce our "Submersible Level Gauge." The maximum allowable input for the pressure-receiving part is 4 MPa, and it has a structure that is resistant to freezing. On-site repairs can be handled by service personnel using a maintenance kit. Additionally, under certain conditions, it is possible to change the span while maintaining accuracy, with measurement ranges available in 10m, 20m, 50m, and 70m. 【Features】 ■ Improved maintainability, reduced downtime ■ Span adjustment of the transmitter is possible ■ Transmitter has high accuracy of ±0.1% *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce our "Optical Transmission Crystal Water Level Gauge." It has a function to detect fiber optic disconnections, and when a disconnection is detected, it automatically stops the laser output immediately. The transmitter uses a high-precision, high-stability quartz crystal oscillator. By using a water temperature sensor in conjunction, it corrects water density based on water temperature, enabling more accurate water level measurements. 【Measurement Range】 ■0–10m ■0–20m ■0–50m ■0–100m *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce our "Crystal Type Water Level Gauge." The transmitter uses a high-precision, high-stability quartz crystal oscillator. It has a built-in lightning protection element, which can also be replaced. The measurement ranges are 0-10m, 0-20m, 0-50m, and 0-100m. Additionally, no special procedures are required when replacing the transmitter. 【Features】 ■ On-site repair is possible, reducing downtime ■ Easy replacement of the transmitter *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce our "radio wave type water level gauge." Since it can measure without contact, it can safely measure even during high water levels. Because it uses weak radio waves, a radio station license is not required. Due to measurement using microwaves, it can measure without being affected by rain, snow, or fog. 【Features】 ■ Non-contact measurement ■ Flexible usage environment conditions ■ No temperature correction needed ■ No radio station license required *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

"RYUKAN" is a portable electromagnetic flow velocity meter that is compact, lightweight, and powered by a built-in battery. It can be mounted on a surveying tripod and does not require any special installation work. It has an automatic tilt correction function built-in, eliminating the need for measurements with a level. Additionally, its small size and battery operation provide excellent mobility, enhancing the safety of flow measurements and reducing labor. 【Features】 ■ Measures flow velocity from a distance without touching the water ■ Compact and lightweight for easy transport and installation ■ Simple operation requiring no specialized knowledge ■ Automatic measurement for safe and stable observation even in bad weather ■ Continuous measurement to capture sudden changes ■ Pre-installation to avoid missing flood peaks *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce our "Radio Wave Velocity Water Level Gauge." It measures the surface flow velocity and water level of rivers using non-contact, angled irradiation. The direction of irradiation can be adjusted to 45 degrees to the left and right in the horizontal direction (azimuth) relative to the river surface, allowing for flexible adaptation to changes in the riverbed after flooding. Additionally, it is compliant with specific radio equipment standards. 【Features】 ■ Simultaneous observation of flow velocity and water level with a single transmitter ■ Non-contact, angled irradiation allows installation in locations that were previously difficult to access ■ Improved functionality with irradiation distance increased from 20m to 30m compared to our conventional models *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

We would like to introduce the "Angle Gauge/Magnetic Proximity Switch" that we handle. The angle gauge accurately detects position even in the event of power outages or accidental noise. It demonstrates exceptional durability even in harsh environments. Adjustments for gear ratio design, actual measurement length, and wire elongation can be easily performed using a calculator. When an abnormality occurs in the proximity switch, sensor abnormalities can be checked. It is possible to remotely confirm the opening and closing status of the gate. 【Features】 ■ Excellent environmental resistance ■ Ability to connect two proximity switches ■ Display lamp ■ High reliability ■ Outstanding durability *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

The "IoT Remote Monitoring System" is a system that allows for the remote confirmation of water level data, camera images, and opening degree information necessary for the control of sluice gates. During events such as rising water levels, alerts and email notifications are issued at appropriate times. With a low-risk opening degree meter, it contributes to the stabilization of various gate controls. 【Features】 ■ Equipment management is handled by the customer center ■ Supports disaster response ■ High quality, high performance, low cost, and flexible equipment configuration *For more details, please refer to the PDF document or feel free to contact us.

• Other security and surveillance systems

We would like to introduce our "Disaster Information Management System." Utilizing the cloud, it enables the visualization of local information such as water levels, rainfall data, and camera images, as well as centralized management of disaster information, including the status of evacuation shelters and the issuance of evacuation information. Various operations and views can be accessed from web browsers on computers and smartphones, which not only supports local government disaster response but also aids residents in taking voluntary evacuation actions by making information publicly available. 【Features】 ■ Easy-to-understand display screen for disaster-related information ■ Ability to register information from smartphones ■ Email distribution to disaster prevention personnel ■ Color-coded evacuation areas based on alert levels *For more details, please refer to the PDF materials or feel free to contact us.

• Other information systems

We would like to introduce our "IoT Multi-Point Observation System." This product collects measured water levels, rainfall, and camera images at a data center, allowing various operations and views through a web browser on a computer or smartphone. It enables monitoring of small rivers, agricultural waterways, reservoir conditions, and urban flooding situations. Additionally, it can display disaster risk information such as public access features and flood risk areas on a map. 【Model Numbers】 ■WP6001/WM6001 ■WW6011 ■WW6012 *For more details, please refer to the PDF materials or feel free to contact us.

• Other environmental analysis equipment

We would like to introduce our "Crisis Management Type Water Level Gauge." This product is a water level observation device that complies with the observation standards and specifications of the Ministry of Land, Infrastructure, Transport and Tourism's crisis management type water level gauge. As of April 2024, we have delivered approximately 2,200 units nationwide. With the remote setting function, operational parameters (observation start water level, observation cycle) can be obtained from the upper server during vital monitoring or at the timing of hourly data transmission. This allows for changes to operational parameters without the need to visit the site, saving time and costs. 【Features】 ■ Changes to operational parameters can be made remotely even in autonomous mode ■ Enhanced logger function allows for storage of observation data for over three months *For more details, please refer to the PDF document or feel free to contact us.

• Other environmental analysis equipment