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Rain gauge, snow cover

Our Products

Road surface freezing detection sensor DSC111

Based on the latest optical technology that senses the road surface without contact, 3 types of eye-safe laser beams with different frequencies are transmitted from the upper lens and received by the lower lens.

Based on the latest optical technology that senses the road surface without contact, 3 types of eye-safe laser beams with different frequencies are transmitted from the upper lens and received by the lower lens.


● Based on optical measurement principle, the road surface condition can be identified finely without contact.
● Grip coefficient can be measured.
● Eye-safe laser class 1
● Easy to install and maintain, all-weather robust design.

Road surface temperature sensor DST111

Optical road surface temperature sensor using long wave infrared radiation.

Optical road surface temperature sensor using long wave infrared radiation.


● Uses eye-safe laser technology to measure road surface temperature without contact.
● Equipped with a unique function to correct errors caused by road surface emissivity, no need to adjust emissivity.
● Easy installation and maintenance.

Automatic rainwater sampler US-330

The lid of this device is automatically opened and closed by a rain sensor to collect rain in a batch and store the sample in the refrigerator.A heater can also be incorporated for cold regions.In addition, a deposit gauge can be added as an option so that dust can be collected except when it is raining.

The lid of this device is automatically opened and closed by a rain sensor to collect rain in a batch and store the sample in the refrigerator.A heater can also be incorporated for cold regions.In addition, a deposit gauge can be added as an option so that dust can be collected except when it is raining.


● Samples are stored in a refrigerator.
● The rain sensor is omnidirectional and the electrode surface is durable, with a SUS electrode on a polymer film.
● The lid is sealed.
● The material of this instrument does not deposit acid or alkali.
● A heater or deposit gauge can be added as an option.
● The case is made of corrosion-resistant aluminum, making it lightweight and highly durable.

Automatic acid rain analysis system C-U273

It automatically detects the presence or absence of rainfall and snowfall, and collects wet and dry fallout separately.A certain amount of wet fallout is automatically collected from the beginning of the fallout, its components are automatically analyzed, and the results are recorded in analog at the same time as being recorded in the data logger.

March 2021 Discontinued

It automatically detects the presence or absence of rainfall and snowfall, and collects wet and dry fallout separately.A certain amount of wet fallout is automatically collected from the beginning of the fallout, its components are automatically analyzed, and the results are recorded in analog at the same time as being recorded in the data logger.

March 2021 Discontinued


● We can measure rain and snow.
● The rain sensor is non-directional and the temperature of the electrode surface is controlled, so the capture rate is good and there is no malfunction due to dew.
● Low temperature snow melting with a hot water heater results in little sample degradation and excellent capture rate.
● A dedicated data logger is available as an option.

Ultrasonic snow depth gauge C-F252 / 242

An ultrasonic pulse is emitted from the transmitter / receiver toward the snow surface, the aerial propagation time of the reflected wave is measured, and snow cover is detected.Since the aerial propagation velocity of ultrasonic waves changes depending on the temperature of the atmosphere, the temperature is measured by a sound velocity correction device to obtain highly accurate data.

An ultrasonic pulse is emitted from the transmitter / receiver toward the snow surface, the aerial propagation time of the reflected wave is measured, and snow cover is detected.Since the aerial propagation velocity of ultrasonic waves changes depending on the temperature of the atmosphere, the temperature is measured by a sound velocity correction device to obtain highly accurate data.


● Non-contact measurement is possible.
● Acoustic matching (patented) emits ultrasonic waves with little loss, making it less susceptible to wind and snow.
● Upper / lower limit alarm, power failure signal and measurement error signal are output.
● Measurement can be performed immediately after installation by simply entering the measurement length and zero point.
● JMA certification can be obtained.

Laser snow cover C-F322

A high-performance laser snow gauge that can measure without contacting the snow surface.A semiconductor laser is used for the detection unit, and observation can be performed with almost no external influences such as temperature and humidity and wind.By adopting the phase difference method, it is resistant to noise and accurate measurement is possible.

A high-performance laser snow gauge that can measure without contacting the snow surface.A semiconductor laser is used for the detection unit, and observation can be performed with almost no external influences such as temperature and humidity and wind.By adopting the phase difference method, it is resistant to noise and accurate measurement is possible.


● Detected by the laser phase difference method, accurate and stable observation is possible.
● Small and lightweight, it can be attached to existing columns.
● Compensation equipment such as a thermometer is not required.
● Because measurement is possible from an oblique direction, it is not affected by measurement errors caused by falling snow from the sensitive area.
● The Japan Meteorological Agency AMeDAS type has a built-in laser beam stop control unit and conversion processing unit based on human detection.

Rain gauge with alarm (for network) N-720KDL

The rainfall alarm device is equipped with a LAN interface as standard, and it is possible to monitor rainfall by utilizing the existing network.In addition, alarms can be set in two stages for each of the three items (select from 3 minutes, 10 hour, day, and cumulative rainfall).

The rainfall alarm device is equipped with a LAN interface as standard, and it is possible to monitor rainfall by utilizing the existing network.In addition, alarms can be set in two stages for each of the three items (select from 3 minutes, 10 hour, day, and cumulative rainfall).


● Equipped with high performance 16bit CPU.
● LCD backlight 3-color display Normal / green 1-stage alarm / orange 2-stage alarm / red
● Buzzer sound of 2 pattern
● Alarms can be set for each 3 item (selected from 10 minutes, 1 hours, days, and accumulated rainfall) at the 2 stage.
● LAN interface is standard.
● RS-232C, analog output, rainfall contact distribution output, alarm output
● Save data for 10 minutes in internal memory. Saved data can be converted to CSV format from the network. (Optional software)

Rainwater storage valve controller C-R602

It collects the rain that falls on the rooftops of buildings, throws away the dirt contained in the initial rainfall, and when it is clean, activates the valve and stores it in the water tank.

It collects the rain that falls on the rooftops of buildings, throws away the dirt contained in the initial rainfall, and when it is clean, activates the valve and stores it in the water tank.


● The amount of initial rainfall can be set arbitrarily.
● The valve can be controlled directly.

Scanning laser snow cover C-F422

Scan the measurement point (snow cover) and measure the snow depth accurately. The laser scanner scans the snow depth of up to 342 points continuously, so stable measurement is possible even if the snow surface is disturbed. We perform processing to remove abnormal data such as invasion of people and animals.

Scan the measurement point (snow cover) and measure the snow depth accurately. The laser scanner scans the snow depth of up to 342 points continuously, so stable measurement is possible even if the snow surface is disturbed. We perform processing to remove abnormal data such as invasion of people and animals.


● The error is within ± 0cm over the entire measurement range of 6 to 1m. It also has a self-determination function.
● Class 1 laser that does not affect the eyes is used.
● CPU processing removes abnormal values ​​corresponding to uneven parts of the snow surface from the multi-point measurement data, averages the remaining data and outputs it as snow depth data. This eliminates erroneous measurements caused by invasion of humans and animals, flying dead leaves, and weeds.

WEB rain gauge N-68WEB

It is a rainfall monitoring system that utilizes the network environment.If you already have an intranet network in place, you can monitor rainfall data anytime, anywhere from a PC on the network simply by connecting to an IP without any special software.

It is a rainfall monitoring system that utilizes the network environment.If you already have an intranet network in place, you can monitor rainfall data anytime, anywhere from a PC on the network simply by connecting to an IP without any special software.


● You can use a general “falling type rain gauge”. Existing products can also be used. (1 pulse / 0.5, 1.0mm types are OK)
● Based on the rainfall data from the start of observation, the 1 time integrated value and daily integrated value can be displayed for each best 10.
● It is possible to display the rain history that allows you to check at a glance the date and time of rainfall at the beginning and end of rain.
● Alarm values ​​can be set in 10 steps for the 1 moving total value and 2 time moving total value. The date and time of occurrence can be confirmed from the alarm history.
● When the rainfall reaches the alarm value, you can send an e-mail to a pre-registered address. Up to 40 addresses can be registered.
● Various forms data can be downloaded in CSV format.
● If there is an accessible NTP server on the network, time correction is performed automatically.

Rainfall data logger (for network) RCL90

The pulse from the overturning rain gauge transmitter is measured, and the fixed value for 10 minutes is saved for one month. The saved measurement data is output in response to the call from the data collection device (personal computer) via LAN or serial port.

The pulse from the overturning rain gauge transmitter is measured, and the fixed value for 10 minutes is saved for one month. The saved measurement data is output in response to the call from the data collection device (personal computer) via LAN or serial port.


● Equipped with LAN port and serial port.
● Data of 10 months recorded every 1 minutes are saved in the internal memory.

Weighing rain gauge Pluvio

The sealed load cell measures minute rain and heavy rain in real time. No maintenance is required compared to the “Falling Method”, and the weight of the rain is directly measured by the weighing principle, so there is little measurement error and a resolution of 25mm has been achieved in an environment of -45 to 0.01 ° C.

The sealed load cell measures minute rain and heavy rain in real time. No maintenance is required compared to the “Falling Method”, and the weight of the rain is directly measured by the weighing principle, so there is little measurement error and a resolution of 25mm has been achieved in an environment of -45 to 0.01 ° C.


● Through software processing (algorithms) based on long-time field tests, factors that affect observation results such as temperature changes, snow, and wind are eliminated, and accurate rainfall data can be obtained.
● Data transmission has digital output (impulse / 0.1mm and status) and serial interface (can be customized with SDI-12 or RS-485).
● There are two sizes depending on the rain collection area.・ Prouvio 2: Rain collection area 200 cm200, maximum measured rainfall 1500 mm ・ Prouvio 400: Rain collection area 400 cm750, maximum measured rainfall XNUMX mm
● A ring heater can be installed as an option. (For Prouvio 200)
● Maintenance work requires only emptying the water collection bucket, checking the appearance from time to time, and adding antifreeze as necessary, and no calibration of the load cell or sensor body is required.

Electronically controlled heater-type rain / snow transmitter RS-N52

As a next-generation rain gauge, it is a fall-type rain gauge equipped with an electronically controlled heater that suppresses evaporation due to the heat of the snow melting heater and prevents snow accretion and freezing in heavy snowfall areas.We have a 0.5 mm meter used by the Japan Meteorological Agency Amedas and a 1.0 mm meter used by the Ministry of Land, Infrastructure, Transport and Tourism.

As a next-generation rain gauge, it is a fall-type rain gauge equipped with an electronically controlled heater that suppresses evaporation due to the heat of the snow melting heater and prevents snow accretion and freezing in heavy snowfall areas.We have a 0.5 mm meter used by the Japan Meteorological Agency Amedas and a 1.0 mm meter used by the Ministry of Land, Infrastructure, Transport and Tourism.


● Controlled by multiple internal temperature sensors and heaters to achieve optimum snow melting temperature
● The base uses brass with excellent heat conduction, and a heater is installed inside to prevent snow from forming.
● Equipped with a safe drainage device that does not hinder observation even if the drainage section is clogged with dust
● Significant weight reduction while maintaining snow melting performance equivalent to the hot water rain gauge adopted by the Japan Meteorological Agency
● Because it does not use the antifreeze used in the hot water type, it is environmentally friendly without disposing of the replacement.
● Easy maintenance by adopting connectors on outer cylinder and base
● With inspection hole to check heater ON / OFF
● Adopted for aviation weather observation by the Japan Meteorological Agency (with type certification)

Rain intensity transmitter RS-635

It detects the amount of rainfall in detail and detects the intensity of rainfall in 1-minute units.Rainfall enters from the water receiving diameter of 200 mm, and water droplets (equivalent to about 0.0083 mm rainfall) that overflow from the nozzle and drip into the kerosene layer are detected by the photoelectric switch and output as a pulse.

It detects the amount of rainfall in detail and detects the intensity of rainfall in 1-minute units.Rainfall enters from the water receiving diameter of 200 mm, and water droplets (equivalent to about 0.0083 mm rainfall) that overflow from the nozzle and drip into the kerosene layer are detected by the photoelectric switch and output as a pulse.


● Predicting rainfall per hour. (Water drops 0.0083mm x 60 minutes = about 0.5mm / hour, and hourly rainfall can be converted in units of 1 minutes)
● It can be used in combination with the falling rain type rain gauge to accurately grasp the precipitation phenomenon during torrential rain.

Rain sensing device NS-131

A comb-shaped printed circuit board electrode is attached to a non-directional conical surface and short-circuited with water droplets of 0.5mm or more to quickly notify that there is rainfall. In addition, the outside air temperature is measured to control the heater temperature on the electrode surface in order to improve the accuracy at the end of falling down.

A comb-shaped printed circuit board electrode is attached to a non-directional conical surface and short-circuited with water droplets of 0.5mm or more to quickly notify that there is rainfall. In addition, the outside air temperature is measured to control the heater temperature on the electrode surface in order to improve the accuracy at the end of falling down.


● Since the heater is controlled by the outside temperature, the supplement rate is excellent.
● No malfunction due to dew or fog.

Coal support

During strong winds, rain and snow are less likely to enter the rain gauge inlet due to the wind, which reduces the rain catch rate. It is a charcoal to reduce the effect of the wind and increase the catch rate of rain. Can be attached to a standard overturning rain gauge or hot water rain gauge.

During strong winds, rain and snow are less likely to enter the rain gauge inlet due to the wind, which reduces the rain catch rate. It is a charcoal to reduce the effect of the wind and increase the catch rate of rain. Can be attached to a standard overturning rain gauge or hot water rain gauge.


● It can be easily installed on existing rain gauges as well as new installations.
● Adopted by the Japan Meteorological Agency, AMeDAS, ground meteorological observation, and aviation meteorological observation.
● Especially effective when installing a rain gauge in high places.

Hot water type rainfall transmitter RS222N series

By injecting antifreeze into the double-structured outer cylinder and keeping it warm, it is possible to suppress the evaporation of snowfall due to the heat of the heater and melt the snowfall for accurate measurement.In addition, a clogging and safe water filter is standard equipment.

By injecting antifreeze into the double-structured outer cylinder and keeping it warm, it is possible to suppress the evaporation of snowfall due to the heat of the heater and melt the snowfall for accurate measurement.In addition, a clogging and safe water filter is standard equipment.


● Adopted by AMeDAS, Japan Meteorological Agency.
● Clogged safe drainage is adopted as standard (JMA joint patent)
● The base and outer cylinder are all made of brass and are not easily rusted.
● With heavy snow and cold area heater (RS-222N2 type)
● Charcoal can be installed to increase the supplemental rate during strong winds. (option)

Falling down type rainfall transmitter RS-102N, 103N series

It falls over due to rainwater entering the water receiving port with a diameter of 200 mm, but it falls accurately and outputs a contact pulse signal every 0.5 mm or 1.0 mm.We have devised a water filter to prevent clogging so that rainwater can enter accurately even in heavy rain.

It falls over due to rainwater entering the water receiving port with a diameter of 200 mm, but it falls accurately and outputs a contact pulse signal every 0.5 mm or 1.0 mm.We have devised a water filter to prevent clogging so that rainwater can enter accurately even in heavy rain.


● Product with model certification.
● Two external contacts are standard equipment.
● Stainless steel outer cylinder * Specified color can be painted (optional)
● There is a type with snow melting heater (H type)
● Clogged relief drainage type available (N2 type) (JMA patent joint patent)
● Charcoal can be installed to increase the supplemental rate during strong winds. (option)

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