Accurate weighing at sea with advanced motion compensation
Founded in 1994, WPL Industries is a leading manufacturer of professional weighing solutions and marine weighing systems, with products exported to more than 50 countries worldwide.
Our marine scales, catch registration systems and weighing software are designed for demanding conditions at sea, delivering fast, stable and repeatable results – from 0.1 g precision weighing on research vessels to heavy-duty weighing up to 3,000 kg on deck.
A wave changes the weight. Compensation changes it back.
A load cell measures force, not mass. When a vessel heaves, pitches or rolls, the deck accelerates and a standard scale shows a number that keeps jumping. Marine scales measure that motion and correct for it in real time, so the display settles on the true weight – fast enough to keep up with catch handling.
Built for salt water, washdown and rough seas
Bench scales for catch and packing, scientific scales for research, flip-up and platform scales for deck work, plus catch registration, labelling and software.
Marine scales
M2 Series Marine Scale
Motion-compensated bench scale in AISI 316 for weighing, packing and labelling catch at sea. 6–400 kg.
M3 Series Scientific Marine Scale
Scientific marine scale in 316L stainless steel for weighing samples at sea, from 0.1 g. 300–6000 g.
M5 Series Marine Platform Scale
Flip-up marine platform scale with four load cells, for heavy loads where deck space is limited. 600–3000 kg.
M6 Series Marine Platform Scale
Economic, fully sealed marine platform scale with four load cells and an optional access ramp. 600–3000 kg.
Catch registration & traceability
Weighing software for marine scales
WeightControl logs and exports every weighing; the R10 Configuration Panel handles calibration, settings and labels.
WeightControl Software
Weighing software inside the R10 scale: statistics, datalogging and an open API, straight from your browser.
R10 Configuration Panel
Service tool for R10 scales: calibration, settings, backup, presets and ZPL label design in one panel.
Everything about weighing at sea, in one place
Independent, practical guides written by weighing engineers: from the physics of motion compensation to EU fisheries control rules, stainless steel grades and data integration.
Weighing at sea
Motion compensation, gravity and accuracy on a moving vessel
Explore topic 02 / 07Legal metrology
EU fisheries control, OIML, NAWI/MID and verification
Explore topic 03 / 07Onboard processing
Grading, batching, labelling and catch traceability
Explore topic 04 / 07Research vessels
Biological sampling and precision weighing for science
Explore topic 05 / 07Hygiene & materials
Stainless steel grades, IP ratings and washdown
Explore topic 06 / 07Data & integration
Logging, APIs, interfaces and ship-to-shore data
Explore topic 07 / 07Buying guides
Capacity, platform size, installation and cost of ownership
Explore topic A–ZGlossary
Marine weighing terms, explained in plain language
Explore topic
Every weighing logged. Every number usable.
WeightControl runs inside the scale – no PC needed. Connect a laptop or tablet to the scale's own access point, open a browser and see live weights, presets and statistics. Export to CSV or PDF, or integrate through the JSON API.
- Runs on the scale
- Statistics per preset
- CSV · JSON · PDF
- Open API
Engineered in the Netherlands, delivered to 50+ countries
WPL holds NMi certificates EK-5417 and CE-284. Our marine weighing systems are designed and built in Geldermalsen and delivered worldwide – to fishing, aquaculture and research fleets in more than 50 countries.
WPL marine weighing systems delivered to more than 50 countries worldwide
A dealer network in more than 20 countries
WPL marine weighing systems are sold and supported through more than 20 dealers in countries around the world. Want to know who represents WPL in your region? Fill in the contact form and we will put you in touch with the right dealer.
From the knowledge centre
EURAMET cg-18 Calibration of Weighing Instruments Explained
EURAMET cg-18 is the European guideline for calibrating non-automatic weighing instruments. A cg-18 calibration tests repeatability, errors of indication across the range and eccentricity, and reports each error with its...
Read guideOIML R51 vs R76: Which Standard Applies to Your Scale?
OIML R 76 applies to non-automatic weighing instruments, where an operator intervenes in each weighing, such as bench and platform scales. OIML R 51 applies to automatic catchweighing instruments that...
Read guideNAWI and MID Directives Explained for Marine Scale Buyers
The NAWI Directive 2014/31/EU covers non-automatic scales and is mandatory for regulated uses such as commercial transactions; the MID 2014/32/EU covers automatic weighing instruments where Member States prescribe them. Conforming...
Read guideEU Fisheries Control Regulation: What It Means for Weighing Catches
Since 10 January 2026, Article 60 of the EU Control Regulation requires all landed fishery products to be weighed per species immediately after landing, by an authorised operator, on systems...
Read guideCalibration, Verification and Re-verification of Marine Scales
Calibration measures how far a scale's indication deviates from reference weights, with an uncertainty. Verification is a legal conformity check that ends with a mark or certificate. Re-verification intervals are...
Read guideAISI 304 vs 316 vs 316L: Which Stainless Steel Survives at Sea?
For equipment exposed to seawater spray and salt, 316 or 316L is the usual choice because 2-3 % molybdenum raises the pitting resistance number (PREN) to 24-26, against 18-20 for...
Read guideMarine weighing questions, answered
Short answers to the questions we hear most. Every topic links to an in-depth guide in the knowledge centre.
What is a marine scale?
A marine scale is a weighing instrument designed to give accurate results on a moving vessel. It corrects for the accelerations caused by waves and vessel motion, and it is built from corrosion-resistant materials such as AISI 316 stainless steel to survive salt water and daily washdown.
Why can't I use a normal scale on a ship?
A load cell measures force, not mass. When the deck accelerates up or down, the force on the scale changes, so a standard scale shows a jumping or wrong value. In a swell the error can easily reach several percent. A motion-compensated scale removes that error.
How does motion compensation work?
A marine scale continuously registers how the vessel moves and corrects the weighing result in real time – including the effect of tilt and of gravity at the place of use. The result is a stable, repeatable reading while the deck is moving, without slowing down the work.
Which WPL scale do I need?
Samples and laboratory work up to 6 kg: the M3 scientific marine scale. Catch, boxes and packing up to 400 kg: the M2 series. Tubs, pallets and bulk up to 3,000 kg: the M5 flip-up or M6 platform scale. Registering and labelling catches: the R50 catch label system.
Are WPL marine scales certified?
WPL holds NMi certificates EK-5417 and CE-284. Whether a scale must be verified for legal-for-trade use depends on your application and national rules. Tell us how the scale will be used and we will advise on the right configuration.
Can weighing data go to my own software?
Yes. With WeightControl every weighing is logged on the scale. Data can be exported as CSV or PDF, and the API provides live weight, stability, presets and logs in JSON – for catch-management software, spreadsheets or your own systems.
Does WPL have a dealer in my country?
WPL works with more than 20 dealers in different countries. Fill in the contact form with your location, and we will put you in touch with the dealer for your region or help you directly.
Tell us what you weigh and where
Every vessel is different. Share your application and we will recommend a scale, platform size and options – with a no-obligation quote.