Why is accuracy so important when measuring high humidity? When growing plants in greenhouses, germinating seeds, storing fruit and vegetables or ripening and storing cheese, temperature and relative humidity are crucial parameters. Humidity levels of between 90 and 100% and temperatures ranging from -1°C and +30°C are normal in these situations. An ordinary humidity sensor quickly becomes saturated under these conditions. Consequently, the sensor responds slowly or not at all. Then, of course, you won’t have a true measurement value.
Dew point, temperature and humidity
We do need to be able to measure humidity and temperature accurately though. A minor deviation in the measurement result can have major consequences. If humidity is high, even a temperature difference of as little as 0.5 degrees can cause you to reach the dew point. Then the water will run down the walls of your climate cell! A small difference in temperature can therefore cause major changes in humidity.
Waste of prepared water
Another consequence of inaccurate measurements is that you are likely to adjust your humidification system incorrectly. As a result, you will be wasting expensive prepared water.
Reduced product quality
Temperature and humidity are two variables that need to be measured accurately because they affect each other. Deviations will have a direct impact on the quality of your product. Crops do not grow optimally, spoilage can occur, or the ripening process of cheese will be disturbed.
Choose the right meter for high humidity
In situations where humidity levels are high, a capacitive humidity sensor will show large deviations after a few days or weeks because it becomes saturated. Fluctuations in humidity are then no longer measured. In such situations, we recommend nSens-HT sensors by Novasina. These sensors are based on the unique electrical resistivity measuring principle, which doesn’t suffer from saturation problems and achieves the fastest response time. A careful, three-month examination of the Novasina sensors showed no measurement errors and no signs of corrosion. For climate cells – vertical farming – in particular, we recommend Novasina’s nSens, which measures humidity up to 100% with an accuracy of 0.5%.
If you would like to know which sensor is the most suitable for which room and where to install it, Feel free to ask our experts.
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