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Sensor development: far-red light for optimal growth

September 14, 2023

Research increasingly demonstrates the impact of far-red light on crucial aspects of plant cultivation. Having control over far-red light in your greenhouse offers some advantages:

  • Vegetative growth control: far-red light creates a shading effect that leads to larger leaves, which is particularly interesting for crops like lettuce, spinach, and basil.
  • Influence on the plant’s day-night rhythm: for short-day plants such as chrysanthemums, it can shorten the time to harvest.
  • Flowering stimulation or prevention: adjusting the ratio of far-red light can either stimulate or prevent flowering.

With a ‘standard’ PAR sensor, we measure visible light (400 to 700 nm). This is the part of the light spectrum responsible for photosynthesis. Far-red light consists of radiation with wavelengths ranging from 700 to 750 nm. Recent scientific research has shown that this part of the light spectrum also influences photosynthesis effectiveness. There is even a request to the ANSI/ASABE standard to expand the active photosynthesis range to 400 – 750 nm.

Color light range PAR + FAR-red

The new PAR-FAR sensor not only measures PAR light but also far-red light. When you combine these values, it provides the ePAR (extended PAR) value, a measurement that offers a more comprehensive understanding of photosynthesis. Additionally, we calculate the PAR to far-red ratio for you, which is particularly interesting for tracking the plant’s development.

In a greenhouse, many factors influence the amount of far-red light a plant receives, making measuring far-red light essential for gaining insight. As a grower, this allows you to exert more control over the quality of your product and improve yields.

Are you interested in when this sensor is operational? Click the button below:

PAR-FAR interest


An image to show the difference in plant height and leaf quality for 3 different light treatments

How can we help you digitise your cultivation process?
Analyse all kinds of information from different data sources such as climate computers, sensors and manual input in a central platform. Improve the production process of your crops, plants, seeds or bulbs together with advisors, distributors and researchers. We are happy to talk to you about which service model is most suitable for your company.

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At 30MHz we think it’s important that our users can use our platform in an optimal way. At times you may have questions and you would like some help from our support team. Email and our support page filled with helpful articles were your go to’s. But we thought it was time for something extra… ...
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See you at GreenTech?

On June 11, 12, and 13 the entire horticulture sector will gather at GreenTech Amsterdam. Visit us at booth 03.404 To discover how we can collaborate: Digital solutions that make it easy to implement data-driven cultivation in practice and optimize your cultivation strategy. Need help with your cultivation questions? The growing kits offer a ready-to-go ...
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