Food Science Instruments


Produce Quality Meter

The F-750 Handheld Brix & Dry Matter Meter uses near-infrared (NIR) spectroscopy to estimate quality metrics such as dry matter, Total Soluble Solids (TSS or brix), titratable acidity, and color. Working like a high-powered flashlight, the F-750 sends particles of light into a commodity, then measures the NIR light interactance with molecular components inside of the commodity to quantify user-selected traits.

The F-750 has a wide range of applications, from determining optimal harvest timing by assessing fruit maturity, to providing an objective analysis of produce quality of fruit in packing houses and upon import.

The F-750 is a handheld, fully integrated system, allowing users to operate it out in the orchard or inside the QA lab. Its simple, intuitive user interface makes it easy for anyone to use, while its model building software makes it customizable and versatile.


Patented in Australia, China, EPO, New Zealand, USA, and South Africa. 

Theory of Operation


Spectrometer: Carl Zeiss MMS-1 Spectrometer

Range: 310-1100 nm

Spectral Sample Size: 3 nm

Spectral Resolution: 8-13 nm

Light Source: Xenon Tungsten Lamp

Lens: Glass, coated to enhance NIR

Shutter: Gold-plated reference standard

Display: Sunlight visible transflective LCD screen

PC Interface: USB and SD card

Data Recorded with Each: Raw data, reflectance, absorbance, first derivative

Measurement: Absorbance, second derviative absorbance

Power Source: Removable 3100 milliamp hour lithium-ion battery

Battery Life: 1600+ measurements

Data Storage: Removable 32 GB SD card

Body: Heavy-duty anodized aluminum body

Dimensions: 7.1" x 4.75"W, 1.75" thick

Weight: 1.05 kg


  • Measures traits including, but not limited to:
    • Total Soluble Solids (TSS or brix)
    • Dry Matter
    • Titratable Acidity
    • Internal Color
    • External Color
  • Fast and consistent — scans take
    4-6 seconds per sample
  • Non-destructive measurements
  • Built-in GPS for easy crop mapping
  • Transflective display for outdoor viewing
  • Rechargeable/replaceable batteries that last all day
  • Ability to create unlimited customizable models for specific varieties or locations

Please see our F-750 Quick Start Guide
for steps on how to get started building models.