humimeter FS1 - grain moisture tester

Grain moisture checked in the field, at the combine

The humimeter FS1 is the smallest whole grain meter in the series: it fits in the hand, runs on four AA cells and needs a portion of some 50 to 65 grams. That makes it right for what it is mostly used for - checking whether a crop is ready to harvest, and a quick control when a batch comes in.

What you can measure

Calibration curves and sample weights

The name of every curve begins with the portion weight that has to be weighed out.

Curve Sample weight Measuring range
Maize 50 g 8 to 30 %
Rye 60 g 8 to 23 %
Triticale 60 g 8 to 23 %
Wheat 60 g 8 to 23 %
Barley 50 g 8 to 23 %
Oats 30 g 8 to 23 %
Rapeseed 55 g 4 to 15 %
Soya 60 g 6 to 18 %
Field beans 60 g 8 to 18 %
Sunflower 35 g 5 to 18 %
Hulled rice 65 g 8 to 18 %
Unhulled rice 40 g 5 to 22 %
Hulled buckwheat 50 g 8 to 18 %
Mustard 60 g 5 to 18 %
Sorghum 60 g 8 to 18 %
Roasted coffee 30 g 1 to 10 %
Hulled green coffee 50 g 5 to 18 %
Reference curve - for checking the readings only

Your benefits

  • a portion of some 50 to 65 g - the smallest in the whole grain series
  • whole grain measurement, without grinding and without sample preparation
  • calibration accuracy ±0.7 % against the reference material
  • bulk density compensated by weighing the portion
  • automatic temperature compensation and measurement of the sample temperature
  • offset function for correcting a curve
  • digital scale, measuring cup and case included
  • result in seconds
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How a measurement is taken

After switching on, the instrument calibrates itself. From there one thing matters: the weighed mass of the portion, because that is what removes the influence of bulk density on the result. The digital scale and the 0.25 litre cup are included for exactly that.

  1. Select the curve matching the product.
  2. Put the empty cup on the scale and zero the reading.
  3. Weigh out the portion whose weight is given in the name of the curve, within ±1.0 g.
  4. Tip the grain into the measuring chamber slowly and evenly.
  5. Read the water content and the sample temperature. The hold function freezes the reading until the next press of the button.

Reference methods

Meters in this series are adjusted against oven method results, separately for each group of products: EN ISO 6540 for maize, EN ISO 712 for cereals, EN ISO 665 for oilseeds and EN ISO 24557 for pulses. A reading can therefore be compared with a laboratory result, and a small deviation taken out with the offset function.

Technical data

Parameter Value
Article number 11752
Measuring range 5 to 30 % water content, depending on the calibration curve
Resolution 0.1 % water content; 0.5 °C/°F temperature
Calibration accuracy against the reference material ±0.7 %
Sample size 30 to 65 g, depending on the curve
Compensation sample temperature measurement; bulk density compensated by weighing the portion
Temperature compensation automatic
Operating temperature 0 to +40 °C
Storage temperature -20 to +60 °C
Protection rating IP 40
Display backlit matrix display 128 × 64
Current consumption 60 mA with the backlight on
Memory hold function
Offset function correction of the calibration curve
Dimensions 155 × 75 × 90 mm
Weight 360 g with batteries
Power supply 4 alkaline AA batteries, 1.5 V
Menu languages English, German, Italian, French, Spanish, Portuguese, Czech, Hungarian, Russian, Polish, international

Scope of delivery

FS1 or FS1.1

Both meters share the same housing, the same weight and the same list of products. They differ in accuracy: the FS1 measures over 5 to 30 % with a resolution of 0.1 % and an accuracy of ±0.7 %, while the FS1.1 covers 5 to 25 % with the same resolution of 0.1 % and an accuracy of ±0.9 %. The FS1 set also includes a case.

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