Swiss made with first class materials


No mobile parts and no obstructing possibility

Very low power consumption

Ultra-optimized acoustic sensing

SDI-12 and IoT compatible

Also compatible to all other common I/O standards


Lifetime, CE certification and Packaging

Rainflow sensor

The extremely robust and zero-maintenance RainFlow RF4 sensor is an evolving acoustic instrument for the comprehensive measurement of the type, amount, intensity and structure of liquid and solid precipitation

  • Non obstructable

  • Instrument with no mobile parts – totally sealed acoustic instrument

  • Universal mounting kit available

  • Omni-directional – even under the highest winds


  • Monitoring of rain and hail precipitation
  • High-resolution disdrometry (number and size of raindrops)
  • Offshore weather buoys
  • Forecast of soil erosion
  • Corrosion free and resistant to the highest winds and the most extreme conditions

  • Plug-and-Play or totally configurable – microcontroller inside

  • Can be connected to almost any external unit

  • SDI-12 and IoT compatible – internal memory

  • Swiss made

Documents & download:

Please download here the original ISAW-Toolbox software suite, for any model of your sensor.

The ISAW-Toolbox software suite is an all-in-one toolbox utility that allows fully configuring and operating your sensor.

You can download the ISAW-Toolbox software suite in two ways:

  • use the standard setup installer (.exe, .dpkg),
  • or download the non-intrusive standalone archive (.zip, .bz2).

Select the package that match your Operating system (Windows, Linux or Mac) and system architecture (32 or 64 bits), download the package.

To use the installer (.exe, .dpkg): Click on the downloaded file and follow the installation process.
From the archive (.zip, .bz2): Unzip the downloaded file and click on the utility you need.”

.exe .zip
isaw toolbox win32 isaw toolbox exe32
Soon :

The RainFlow RF4 sensor:  an ultra-robust instrument

It is a very low-power, maintenance-free and totally sealed acoustic instrument with no mobile parts.

The instrument includes a dedicated analog conditioning module, a digital I/O module and an analog restitution module that can be connected conveniently to almost any external central unit (data logger, industrial module interface, instrumentation DAQ, USB port).

It features continuous or pulse analog voltage outputs and supports SDI-12 communication, serial RS-232, and Modbus RTU RS485 (using an optional adapter).

The sensing part of the instrument is an anti-abrasion, anti-adhesion and anti-rime coated hemisphere supported by a strong stainless steel arm.

It measures and distinguishes liquid and solid precipitation. It is especially optimized for rain measurement and hail detection.

The full configuration of the sensor can be customized at any time, in a non-volatile memory, with a Plug-and-Play computer connection thanks to the universal USB dongle accessory provided with the sensor and the free ISAW-Toolbox software suite.