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Automatic Rainfall Recorder - Mertani
Automatic Rainfall Recorder (ARR) Mertani buatan Indonesia

Automatic Rainfall Recorder (ARR)

Get real-time rainfall reports from your farm from anywhere and anytime, and enhance water management to ensure an adequate water supply for your crops throughout the year
Plug & Play
Access Anytime
& Anywhere
Waterproof Enclosure
Waterproof Enclosure
Lahan Sawit | Mertani

Discover ARR Mertani!

Mertani Automatic Rainfall Recorder (ARR) in Plantations


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.

Automatic Rainfall Recorder

Hardware Details
  • Ultra-Low Power MCU Based on Cortex M4+

  • Input digital sensor RS485 (Modbus), I2C, RS232, Serial TTL, one wire. Under development: SDI12

  • Operates from 2.7 V up to 5.5 V

  • Operational temperature 0°C to +85°C

  • Internal memory 16 MB

  • Extended industrial memory up to 256 MB

  • Weather-resistant 

  • GSM (2G, 3G, and 4G) 

  • WiFi and Bluetooth Low Energy (BLE)

  • LoRa 920-923 MHz


  • Tipping bucket rainfall sensor

  • Realtime rainfall measurements hourly, daily, monthly, and annually

  • Resolution 0,2 mm (default)

  • Accuracy (2mm/min) ±2%

  • Internal battery 10.000 mAh

  • Solar panel 10 Watt

  • External power supply 5V

Automatic Rainfall Recorder (ARR) Mertani buatan Indonesia

Choose Rainfall Sensor Type that suits your industry's needs!

Rainfall Sensor Type

Stainless Rainfall Sensor

Pronamic Sensor - Mertani


  • Material ceramic blade design

  • Collecting area 200cm2 (φ159.60±0.6mm), Resolution 0.2mm

  • Measuring range Rain intensity: 0~4mm/min; rainfall: >0.2mm

  • Maximum tolerance ±0.4mm(≤10mm); ±4%(>10mm)

  • Operating temperature 0~60°C

  • Output mode RS485, power supply: 0.5W, 5~24VDC

  • Contact power Max: 0.5W, Max: 24VDC, Pulse width ≥30ms

  • Housing aluminum alloy, Dimensions Rain sensor: 185x185x320mm; bracket diameter: φ50mm

Rainfall Sensor Type

Single Spoon Rainfall Sensor

Single Spoon Rainfall Sensor


  • Bucket made in POM, which is a more dismissive material and therefore makes dust and dirt not stick so easily

  • The rain gauge made in molded thermoplastic, also known as ASA, which has high outdoor weather ability

  • Collecting area 200cm2 (φ159.60±0.6mm),

  • Resolution 0,2mm

  • Measuring range Rain intensity: 0~6mm/min;

  • Output mode RS485

  • Accessories: Standard pole bracket item, 2 m binder cable mounted on the sensor, bird spikes, leaf grid

Rainfall Sensor Type

ABS Rainfall Sensor



  • Material ABS UV Stabilished plastic bucket

  • Collecting Φ200+0.6mm,

  • Resolution 0,2mm

  • Measuring range Rain intensity: 0~4mm/min;

  • Maximum tolerance ±0.4mm(≤10mm);Accuracy ≤±4%

  • Operating temperature -10°C~50°C

  • Output mode RS485,

  • Include bull eye/ waterpass

  • Dimensions Rain sensor: 310x310x460(mm)

Rainfall Sensor Type

Tipping Bucket and Observatorium

Tipping Bucket and Observatorium


  • Material ceramic blade design,

  • Collecting area 200cm2 (φ159.60±0.6mm), Resolution 0.1mm

  • Measuring range Rain intensity: 0~4mm/min; rainfall: >0.1mm,

  • Maximum tolerance ±0.4mm(≤10mm); ±4%(>10mm)

  • Output mode RS485, power supply: 0.5W, 5~24VDC

  • Housing aluminum alloy, Dimensions Rain sensor: 185x185x320mm; bracket diameter: φ50mm

  • The observatorium is made of stainless steel plate, 60cm height, the diameter of the funnel is 11.3cm

  • The volume of the rain measuring glass is 25mm

Study Case

Study Case

Implementation of the Automatic Rainfall Recorder for Rainfall Monitoring in Palm Oil Plantations

Every morning, precisely at 07:00, the water management department conducts rainfall measurements using a rain gauge. Upon arrival at the observation site, the valve of the rain gauge is opened, and the collected water is measured in a measuring glass. Subsequently, the daily rainfall data is obtained from the reading of the measuring glass. The rainfall value is recorded on paper sheets and taken to the plantation office for reporting to the management.

The challenge arises when heavy rain occurs in the morning, hindering rainfall measurements. The measurement results may become less representative if there is a period of intense sunlight and evaporation within 24 hours. Furthermore, there is a risk of losing or damaging the record sheets. Therefore, the plantation has decided to replace the manual rain gauge with Automatic Rainfall Recorder.

Commodity: Palm Oil

Technology: Automatic Rainfall Recorder

Automatic Rainfall Recorder | Mertani

Brochure Product

Brosur Mertani_Automatic Rain Recorder (ARR)/ Automatic Rainfall Station (ARS)sebagai Solusi Digitalisasi Perkebunan di Indonesia


Automatic Rainfall Station
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