A&D EK-4100i for Parts, Batching, Inventory & Production Weighing
- pete8781
- Jul 31
- 4 min read
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The A&D EK-4100i production scale is a strong fit for operations that need up to 4000 g of capacity with 0.1 g display resolution for parts, batches, kits, samples and packaged materials.
Parts counting and inventory control
The combination of 0.1 g readability and ACAI counting is useful for many medium-small industrial parts: screws, washers, pins, clips, terminals, fittings, machined pieces, small castings and packaged hardware. Start with a representative sample, let the balance establish an average unit weight, then add more pieces so ACAI can refine that average. A larger sample generally gives a better result when parts have normal manufacturing variation. For cycle counts, verify a few lots manually before relying on the balance for high-volume inventory adjustments.
Batching and formulation
A 4 kg capacity lets operators use practical containers while still reading to 0.1 g. This can fit adhesives, coatings, inks, flavor components, research blends, cleaning concentrates, small chemical batches and production trials. Tare the empty container, add each ingredient deliberately and use accumulation or written batch records when several additions must be documented. If a recipe contains ingredients with tolerances tighter than 0.1 g, do not assume the EK-4100i is adequate simply because the display shows a tenth of a gram; measurement capability should be matched to the process tolerance.
Kitting and assembly verification
Comparator checks can make the EK-4100i a useful final kitting station. Establish acceptable low and high limits around a known-good assembly or kit, then use the comparator indication to flag missing or extra components. This works best when the missing component has enough mass to create a clear separation from normal variation in packaging and parts. For complex kits with very light pieces, counting individual components may be more reliable than a single gross-weight check.
Production sampling and quality control
Production teams can use the balance to check molded parts, machined samples, filled containers, subassemblies and incoming materials. The standard RS-232C connection is especially useful when measurements are taken repeatedly and need to be captured electronically. A consistent sampling plan should define where the sample is placed, how long operators wait for stability, how often a verification weight is checked and what action is taken when a result exceeds tolerance.
Packaging development and fill checks
Packaging engineers can compare empty package tare, filled weight, component sets and prototype materials. Because the pan is 170 × 133 mm, the balance is best for packages that sit comfortably without contacting the housing or overhanging in a way that creates instability. For production checkweighing, the comparator and buzzer can support rapid operator feedback. For regulated net-content enforcement, confirm that the weighing equipment and procedure meet the applicable legal requirements rather than assuming a general-purpose balance is automatically approved for commercial transactions.
Mobile inspection with the optional battery
The optional rechargeable battery makes the EK-4100i useful on inspection carts and temporary workstations. A&D documents roughly nine hours of continuous operation under its stated conditions. Before recording measurements after moving the balance, re-level it and verify with a known weight. A mobile balance is still a precision instrument, so a rigid cart with locked wheels is much better than a flexible table or a surface that moves when the operator leans on it.
Using the underhook for awkward samples
The EK-4100i supports underhook weighing, which can help with awkward shapes, density work or suspended fixtures. Ensure the suspended load remains centered and free, and include any fixture mass in capacity planning. Do not use the underhook arrangement to pull sideways on the balance or create a force-testing rig; a weighing balance and a force measurement system have different mechanical design requirements.
Data capture with RS-232C
Standard RS-232C can feed a printer, data logger or computer. For production use, decide whether data should stream continuously, transmit on command or be sent when the operator presses PRINT. Build identifiers such as lot number, operator, machine or work order into the receiving process so a weight value is not separated from its context. A digital connection improves recordkeeping only when the surrounding workflow is designed clearly.
FAQ
Is 0.1 g readability enough for parts counting?
For many medium-small parts, yes. Very light parts or parts with wide individual weight variation may need a finer-resolution counting balance or a larger sample.
Can the EK-4100i check completed kits?
Yes, comparator limits can help identify kits outside an acceptable gross-weight range when missing or extra components create a detectable weight difference.
Can it be used for batching?
Yes, for batches whose capacity and tolerance fit a 4000 g × 0.1 g balance. Include container tare in capacity planning.
Does the balance store data internally?
Its strongest documented data path is standard RS-232C and supported output functions. Use the connected device or software for durable production records.
Can it move between workstations?
Yes, especially with the optional battery, but it should be re-leveled and verified after relocation.
What is the main limitation for industrial use?
The 4000 g capacity and 0.1 g readability define the core measurement envelope. Large packages, harsh washdown areas or tighter tolerances may require a different scale family.
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