gold medal2

Paris, November 06, 2022

The Opti-Sensor analyser wins a gold medal at SIMA 2022!

SAMSON GROUP A/S is developing the first NIR (near-infrared) sensor to measure the dry materials level and NPK values in solid organic fertilisers (manure, compost, etc.) in real time.

EPSOLYS: The collaborative project behind the Opti-Sensor

The initial project led by Samson Group, INRAE and Photon Lines aimed to develop an integrated spectroscopy system to quantify the nutrients contained in manure. This multidisciplinary project combined the experiences and strengths of each party:
– INRAE helped build the database from 500 organic products collected from different livestock.
– Photon Lines developed the sensor.
– Samson Group determined the operating constraints and installed the sensor on the machine.

Opti-Sensor: A compact and autonomous embedded sensor

The Opti-Sensor is built into the spreader’s side panel. It uses near-infrared spectroscopy, a method with a proven track record in agriculture, notably regarding NIR sensors used in slurry. Samples are collected on a regular basis. The results are compared to the EPSOLYS database and help determine the rate of dry materials and ammonia nitrogen as well as carbon, phosphate and potassium in solid manure. The in-cab screen shows the real-time measurement.

Even more precision for solid organic fertiliser spreading

Manure is highly heterogeneous, making it impossible thus far to guarantee even spreading. A quantitative analysis of nutrients will ultimately make it possible to control spreading of one of the components as desired. Thanks to the Opti-Sensor, the operator will be able to use organic fertilisers to their full potential. It will prevent over- or under-dosing with a supply that is controlled at every hectare. This innovation will reduce mineral fertiliser costs, decreasing the environmental impact of spreading operations.

The EPSOLYS project is funded by the Region of Brittany and the FEDER.

About Samson Group:
SAMSON GROUP A/S comprises the companies SAMSON AGRO A/S, Samson Agrolize A/S, Samson Agrolize AB, SAMSON AGRO SASU and SAMSON AGRO SP Z.o.o. The group owns the SAMSON and PICHON brands and is a leading European supplier of natural fertilizer machines and associated application technology. SAMSON GROUP has state-of-the-art production units in Denmark, France and Poland and sells its products through a well-established network of dealers.

Press enquiries: Laurent BLIN
Product Manager, Solid Spreading
Tel.: +33 (0)6 77 97 69 69 – Email:

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