Discover ARR Mertani!
Mertani Automatic Rainfall Recorder (ARR)
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​Mertani Automatic Rainfall Recorder (ARR) will assist you in measuring rainfall from anywhere and anytime. ARR will help you obtain more accurate rainfall data, improve farm water management, and enhance fertilizer absorption efficiency.
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Challenge
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Indonesia, with its diverse regions characterized by high rainfall, faces limitations in the number of rain gauge stations. As a result, rainfall data becomes uneven and difficult to predict. This situation highlights the importance of enhancing infrastructure for more accurate weather measurements.
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The use of ARR devices is supported by various government regulations and policies related to environmental management and disaster mitigation. This is reflected in various laws and government regulations governing the use of technology for environmental measurement and monitoring, including rainfall.
About Automatic Rainfall Recorder
Definition
The Automatic Rainfall Recorder (ARR) is a device that assists you in measuring rainfall easily and accurately, regardless of location and time. Its benefits include enabling users to monitor rainfall patterns more efficiently, aiding in irrigation planning, flood risk mitigation, and better water resource management.
Legal Basis
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Law of the Republic of Indonesia Number 31 of 2009 concerning Meteorology, Climatology, and Geophysics. see detail.
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Government Regulation of the Republic of Indonesia Number 46 of 2012 concerning the Implementation of Meteorological, Climatological, and Geophysical Observation and Data Management (ARR). see detail.
Remote Terminal Unit (RTU)
Detail
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Mertani data logger
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Power unit
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Komunikasi data (2G, 4G, LTE)
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Panel box
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Wiring system
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*The installation of RTU can be adjusted to field conditions.
Parameter
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Curah hujan
Choose Rainfall Sensor Type that suits your industry's needs!
Rainfall Sensor Type
Stainless Rainfall Sensor
Details:
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Material ceramic blade design
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Collecting area 200cm2 (φ159.60±0.6mm), Resolution 0.2mm
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Measuring range Rain intensity: 0~4mm/min; rainfall: >0.2mm
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Maximum tolerance ±0.4mm(≤10mm); ±4%(>10mm)
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Operating temperature 0~60°C
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Output mode RS485, power supply: 0.5W, 5~24VDC
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Contact power Max: 0.5W, Max: 24VDC, Pulse width ≥30ms
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Housing aluminum alloy, Dimensions Rain sensor: 185x185x320mm; bracket diameter: φ50mm
Rainfall Sensor Type
Single Spoon Rainfall Sensor
Details:
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Bucket made in POM, which is a more dismissive material and therefore makes dust and dirt not stick so easily
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The rain gauge made in molded thermoplastic, also known as ASA, which has high outdoor weather ability
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Collecting area 200cm2 (φ159.60±0.6mm),
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Resolution 0,2mm
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Measuring range Rain intensity: 0~6mm/min;
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Output mode RS485
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Accessories: Standard pole bracket item, 2 m binder cable mounted on the sensor, bird spikes, leaf grid
Rainfall Sensor Type
ABS Rainfall Sensor
Details:
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Material ABS UV Stabilished plastic bucket
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Collecting Φ200+0.6mm,
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Resolution 0,2mm
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Measuring range Rain intensity: 0~4mm/min;
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Maximum tolerance ±0.4mm(≤10mm);Accuracy ≤±4%
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Operating temperature -10°C~50°C
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Output mode RS485,
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Include bull eye/ waterpass
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Dimensions Rain sensor: 310x310x460(mm)
Rainfall Sensor Type
Tipping Bucket and Observatorium
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Details:
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Material ceramic blade design,
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Collecting area 200cm2 (φ159.60±0.6mm), Resolution 0.1mm
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Measuring range Rain intensity: 0~4mm/min; rainfall: >0.1mm,
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Maximum tolerance ±0.4mm(≤10mm); ±4%(>10mm)
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Output mode RS485, power supply: 0.5W, 5~24VDC
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Housing aluminum alloy, Dimensions Rain sensor: 185x185x320mm; bracket diameter: φ50mm
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The observatorium is made of stainless steel plate, 60cm height, the diameter of the funnel is 11.3cm
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The volume of the rain measuring glass is 25mm
Study Case
Automatic Rainfall Recorder Installation in Jambi
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In February 2025, the Mertani team carried out the installation of three Automatic Rainfall Recorder (ARR) devices in Jambi Province. This installation aims to monitor rainfall and provide real-time and accurate rainfall data using rainfall sensors. It is hoped that the data generated can support hydrological monitoring and water resources management in the region.
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Technology: Automatic Rainfall Recorder (ARR)
