Yara Fertilizers

Frequently Asked Questions

What is the maximum distance between the Transmitters and the Base Station?


The distance between the Transmitter and the Base Station can be up to max. 1500 m (433 MHz version, up to 500m for US/Brazil 915 MHz version), depending on the environmental conditions (clear path between the antennas, antenna arrangement, leaves around antennas, etc.).The distance can be doubled by using the Repeater. To provide the best signal please:

  • ensure an unobstructed path between the antennas of the Transmitters and the Base Station (for example by installing the antennas above the plants);
  • remove leaves or other objects which are near the antennas, and mount the two Base Station antennas at least two feet away from each other;
  • use directional antennas or larger antennas;
  • always install the antennas vertically!;
  • for special requirements there are Transmitters with the possibility of using external antennas available (only with the 433 MHz version).

Is it safe to use the Yara Water-Sensors in the field? Is it resistant to rain, sun and chemicals?


The system is developed and designed for field conditions, therefore it is safe to be used outdoors. The devices are resistant to direct sun, rain, moisture as well as common fertilizers and pesticides.

How long do the batteries in the Transmitter last?


The Transmitter is powered by commercially available AAA batteries. The battery life depends particularly on the quality of the batteries and on the measurement intervals. Usually one set of batteries ensures reliable operation over one vegetation period. When the batteries are running low you will see a notification on the MyYara website. If the batteries run out the Transmitter will not collect the data and there will be no possibility to retrieve them. The empty batteries can leak and damage the device.

How long is the warranty on the different pieces of the Yara Water Solution?


The Yara Water-Sensor is designed for use during a vegetation period. The durability depends on environmental conditions during the use, and on following the application notes. Please see question below: What do I need to do before installing the Yara Water-Sensors in the next season?

The Transmitter and the Base Station are long-term field-tested devices and can be used for several years under field conditions, when following the application notes. The warranty for these devices is two years after delivery.

What do I need to do before installing the Yara Water-Sensors in the next season?


Before starting the measurements in the next season we recommend to test the Yara Water-Sensors by checking two parameters: state of the Yara Water-Sensor polymer and temperature independency.

To check the polymer, carefully clean the surface of the Yara Water-Sensor using a soft tissue and water. Then take a picture of the blue polymer surface and send the pictures to us via email.

To check temperature independency, set-up the data transfer connection. Then connect the Yara Water-Sensors to the Transmitters without clamping them on a leaf. Connect the Temperature-Sensor as well. Put the Yara Water Solution (the sensors with Transmitters) in a place where the temperature change is bigger than 10°C. You can leave it in the field over night or put it in the fridge for 1-2h (time to reach a plateau in the temperature). Let us know when you start the test. Keep the Yara Water-Sensors running for at least 24 h.

Based on our experience during field trials in South Australia, in 10% of the Yara Water-Sensors the silicon layer must be replaced with a new one.

A description on how to clean the sensors and check the surface and temperature dependency is also available as a video tutorial: Important points to be considered after clamping. Check links on the right.

We use cookies on this website. If you continue to use the site without changing your settings, you agree that we may store and access these cookies on your device. To understand more about our use of cookies and to change cookie settings at any time please see
Cookie Preferences
I accept cookies