dry matter measurement with the weltech digital hydrometer

Weltech Digital Hydrometer

The Weltech Digital Hydrometer automatically and quickly calculates the dry matter content, starch percentage, underwater weight and specific gravity of potatoes using the weight in water method. It is used extensively throughout the potato industry by producers of all types of potato products.

The latest version, the PW4 replaces the older PW2050 model and comes with many new enhancements and features. 

dry matter basket with potatoes
dry matter measurement with the weltech digital hydrometer

Key Features

  • Dry matter content, starch percentage, underwater weight and specific gravity
  • Instant results – does not require a precisely-weighed sample; measures all potato dry matters
  • Easy to use – static unit, needs only a small water container (c.40cm deep); push-button control
  • Precise – digital read-out; accurate to +/- 0.3%; easy self-calibration (using a known test weight)
  • Data storage – internal memory for up to 5000 time and date stamped weights
  • USB export as standard – export batch data in .CSV format to a USB drive for further analysis
  • Standard or French fry dry matter testing

Display all the data you need!

The new 6 inch colour screen gives ample room to display all the data the operator needs without the need to scroll through complicated menus.

A newly designed multi-lingual user interface takes advantage of the large LCD screen making the setup, measuring and analysing process quick and easy. 

On-screen prompts guide the user when setting up the unit, minimising downtime and helping users unfamiliar with the PW4 quickly get up to speed. 

All day battery-life

As the batches keep coming, the PW4 keeps running. The new PW4 comes pre-installed with a high-capacity rechargeable lithium battery, and combined with a newly designed energy-efficient processor, keeps the PW4 running all day long. An accurate battery percentage meter is displayed at the top of the screen to let you know when its time to recharge. 

Everything you need to get weighing

The PW4 comes with a sample basket with suspension chain, pre-installed rechargeable battery, battery charger and strong carry case.

All models are suitable for standard and French fry dry matter testing

Range 1.5-6Kg potatoes (must not exceed 10Kg)

weltech digital dry matter measurement

How to use the Weltech Digital Hydrometer

A few simple button presses take the weight and display the data.

Full Details and Specifications

Weltech Hydrometer Range

HydrometerProduct CodeWeight range
PW4POT/HYDPW41.5 - 6Kg
Must not exceed 10Kg

Technical Specifications

DimensionsWeightAccuracyResolutionMemoryData outputPowerLanguages
Weigher: 170 x 140 x 97mm
Case: 450 x 130 x 360mm
Weigher: 1.5Kg
w/ carry case: 2.14Kg
+/- 0.3% 0.01 scale reading5000 individual weights
Data stored if power off or batteries removed
XML file
Readable in Excel
(USB version only)
Internal rechargeable lithium batteryEN, SP, DE, FR, PT

Battery charger: Input 230v, 50Hz, 10W; Output 12V, 300mA, 3.6VA; c.12 hour re-charge time; display has charge level indicator; Charge duration: up to 15 hours; Battery life: 3-4 years 

NB. The Weltech Dry Matter Weigher is NOT waterproof 


Water containerWaterOperating conditions
356mm dia. x 400mm deep
Clean metal or plastic
Basket and sample must be fully immersed
Clean water
c.15°C / 60°F
-30 to 50°C up to 95% RH
(Avoid sudden changes that can
cause condensation)

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