サカキコーポレーション Product Lineup

The "RTD Series" is a tipping bucket rain gauge designed in accordance with the WMO-No.8 guidelines. It is made entirely of corrosion-resistant materials, achieving accurate and reliable rainfall measurement with minimal maintenance. The resolution options are 0.1mm, 0.2mm, and 0.5mm. It also includes a built-in bubble level to assist with precise installation. 【Features】 ■ High-precision measurement in compliance with WMO-No.8 guidelines ■ Robust housing design with corrosion-resistant materials ■ Models with heaters capable of measuring rain, snow, and ice ■ Built-in diagnostic sensors continuously monitor temperature, humidity, and pressure ■ A wide range of output types including contacts, RS485, and analog signals *For more details, please download the PDF or feel free to contact us.

■The capacitance value of the sensing element changes in response to the wet sensing surface caused by raindrops. ■The built-in heater evaporates moisture from the rain sensor to maintain dryness and prevent false signals (malfunctions) caused by mist or dew. ■At low temperatures, this heater melts snow and detects snowfall using the ambient temperature sensor. ■The circular dome on the outside of the rain gauge serves as a windbreak to prevent sensor malfunctions. ■Equipped with an automatic calibration algorithm to correct fluctuations (drift) in response caused by dirt accumulating on the sensor's sensing surface. ■Features RS485 digital output that can be used with Modbus-RTU or proprietary protocol, 0/4–20mA or 0–10V analog output, and a voltage-free contact output. ■Protection rating IP68. ■A bracket for mounting on walls or poles with a diameter of 30–50mm is included as standard. ■Bird deterrent spikes are optional. ▲Built-in heater accurately detects rain, snow, hail, and sleet. ▲Compact size of φ70×70mm, high durability, protection rating IP68. ▲Operating temperature -40 to +60℃, bird deterrent spikes (optional). ▲Drift correction due to dirt is achieved through a self-calibration algorithm. ▲RS485 (Modbus-RTU or proprietary protocol) / Analog / Contact output.

■ Connects to various data acquisition systems through diverse output interfaces ・ RS485 Modbus or proprietary ASCII protocol output ・ SDI-12 output ・ Voltage-free pulse contact output ■ Measured rainfall is regularly stored in non-volatile memory, and this information is retained even in the event of a power loss ■ Equipped with sophisticated functional features that reduce the influence of wind, ensuring better accuracy and stability in measurements ■ Built-in NTC temperature sensor to manage the internal temperature of the rain gauge ■ A heater-equipped version is available, which automatically operates under certain conditions to prevent snow and ice. No antifreeze or oil is required ▲ RS485 Modbus/SDI-12 output, voltage-free pulse contact (NO) output ▲ Heater included (HD2016R) operating temperature -20 to +70℃ (<4℃ start) ▲ Automatic drainage function, rainfall preservation function during drainage, wind influence reduction function ▲ Bird deterrent spikes φ3mm×H60mm×8 pieces, elevated mounting (optional)

■ High-resolution measurement is possible. In addition to the standard 0.2mm, specifications can be set for 0.1mm and 0.5mm. ■ The main body is made entirely of corrosion-resistant materials, ensuring excellent long-term reliability. In the heater-equipped version, the heater automatically operates around +4°C to eliminate residual snow and ice even in low environmental temperatures or during/after snowfall. ■ The power supply voltage is DC24V (HD2015R) or DC12V (HD2015R1), with a power consumption of approximately 75W. ■ The measured rainfall is based on the number of times the tipping bucket empties: (1) A collection cone connected to an aluminum cylinder directs rainwater into the tipping bucket. (2) When the specified level is reached, the accurately calibrated tipping bucket rotates under its own weight to drain the rainwater. (3) During the rotation of the bucket, a normally closed reed contact opens momentarily, sending a pulse signal to the counter. * The number of pulse signals is detected and recorded by data loggers or pulse counters such as the HD2013-DB. ▲ Rain, snow, and ice measurements are possible with the heater-equipped models (HD2015R/R1). ▲ Resolution per pulse can be selected as 0.1mm/0.2mm (standard)/0.5mm. ▲ Bird deterrent spikes and wireless loggers for cloud connectivity are also available as options.

- Measurement resolution is available in standard 0.2mm, as well as 0.1mm and 0.5mm. - An integrated bubble level assists in accurate installation. - Corrosion-resistant materials provide excellent long-term reliability. - In the heater-equipped version, the heater automatically operates around +4°C during low environmental temperatures, snowfall, or after snowfall to eliminate residual snow and ice, enabling high-precision measurements. - Power supply voltage is DC24V (HD2013R) or DC12V (HD2013R1), with a power consumption of approximately 165W. - A collection cone connected to an aluminum cylinder directs rainwater into the measuring container. → When the specified level is reached, the accurately calibrated container rotates under its own weight to drain the rainwater. → During the rotation of the container, a normally closed reed contact opens momentarily, sending a pulse signal to the counter. → Rainfall is measured based on the number of times the container rotates and empties. - The number of pulse signals can be detected and recorded by data loggers or pulse counters like the HD2013-DB. - By combining with the wireless data logger HD33 series, which has a built-in communication modem, measurement data can be directly uploaded to the cloud, allowing for monitoring of rainfall information.

■A data logger developed for the purpose of acquiring and storing rainfall trend data. ■Long-term data recording is possible due to the built-in long-life lithium battery and large-capacity memory. ■If the built-in lithium battery is depleted, it can be replaced with standard alkaline batteries (3 units, not included with HD2013-DB). ■Using the software HD32MTLogger, which can be downloaded from the website, it is possible to set parameters for the data logger, display real-time measurements obtained by the logger, download data to a PC, and process stored data. ■Connection to a PC is made using the M12 screw RS232C 8-pin serial connector located at the bottom of the logger case. ▲Continuous operation for approximately 5 years with lithium batteries and about 1.5 years with alkaline batteries. ▲Resolution can be set from 0.050 to 1.599 mm/pulse. ▲Storage of 32,255 data points with large-capacity memory, RS232C serial I/F. ▲IP67, dual-display backlit LCD, red/green status indicator LED.