Martin Lishman - Zeal Potato Hydrometer

Used extensively throughout the potato industry by producers of foods such as crisps, french fries, potato wedges and canned, frozen and powdered potato products.

This is a simple and accurate method of measuring the solid content or percentage dry matter of potatoes. The method of use involves placing a known weight of potatoes in the basket and suspending the hydrometer and potatoes in a large container of clean water.

The buoyancy of the unit in water determines the water level against the vertical scale and hence gives the dry matter reading.



  • Suitable for static applications, requires large water bin (45 gal/175 liter)
  • Potato weight needs to be exact.
  • Available in different dry matter ranges from 17 to 27 %



Martin Lishman - Potato Dry Matter Field Kit

Martin Lishman - Potato Dry Matter Field Kit

Martin Lishman Ltd.

This portable unit is specifically designed for use in the field and provides information on dry matter distribution

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Weight in Water Digital Balance

Martin-Lishman - Weight in Water Digital Balance

Martin Lishman Ltd.

The best and most convenient way to measure dry matter content of your potatoes.

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USDA french fry color card

USDA french fry color card

Martin Lishman Ltd.

The standard colour card that is used world wide for the evaluation of french fries is the USDA french fry colour card

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