Scales

Answer this before capacity and most of the catalogue disappears. A forklift can drive straight onto a floor platform, so a surface-mounted deck is fine. A pallet jack cannot climb the deck height, so the same platform needs either ramps or a pit frame set flush with the floor, and a pit means concrete work, drainage and a contractor.

If neither is practical, weigh beams change the question. A pair sits directly on the floor under the ends of a pallet or under a set of wheels, so there is no deck to climb, no ramp and no pit. They also store against a wall, which is the real argument for them: one pair can weigh at the dock in the morning and in the yard in the afternoon.

Then look at what the loading does to the structure rather than to the sensor. Shock is the load case that kills floor scales, not steady weight. The Guardian platform is rated 7,500 lb at the corners and 15,000 lb at the edges on a 5,000 lb scale for exactly that reason: a jack setting a pallet down hard puts far more instantaneous load into one corner than the nameplate capacity suggests.

Capacity is the easy half. Size above the heaviest thing that will ever sit on the deck, and count the dead load with it: the pallet, the drum, the tote and the fixture all spend capacity you were saving for product. Leave headroom for the load arriving faster than expected rather than settling gently.

Readability is the half that gets missed. A scale's division is the smallest step it displays, and dividing capacity by division gives you the number of divisions the scale actually resolves. A 5,000 lb capacity displaying in 1 lb steps is 5,000 divisions, which is a normal industrial figure. Asking that same 5,000 lb platform to resolve a tenth of a pound is asking for 50,000 divisions, and no legal-for-trade floor scale works that way.

So oversizing costs you twice. A platform rated far above its working load spends its life at the bottom of its range, where the signal is smallest and drift, noise and thermal error count for proportionally more, and the coarse division that comes with the high capacity is locked in. Decide the increment you will actually act on first, then pick the smallest capacity that comfortably covers the load.

If you need both a wide range and a fine step, that is normally two scales: a floor platform for pallets and a bench or counting scale for the parts that go on them.

If weight determines what is invoiced, the answer is yes, and it narrows the catalogue immediately. In the United States that means NTEP certification, issued as a Certificate of Conformance against NIST Handbook 44; internationally the equivalent classification is OIML R76. Most industrial weighing lands in Class III, which is the accuracy class Handbook 44 defines for general commercial use.

Two things catch people out. First, the certificate covers a combination, not a component: a platform is approved together with specific indicators, which is why the Guardian family and the wireless TI-500 RF indicator hold approval as a system rather than separately. Swap in an indicator that is not on the certificate and the scale is no longer legal for trade even if it reads correctly.

Second, certification is not the same as being allowed to use it. The finished installation still has to be placed into service and sealed by your local weights and measures inspector, and that inspection looks at the installation, not just the equipment. Buy certified, install level, and have it sealed.

If nothing is sold by weight, non-certified equipment is usually the better value: for process control, shipping checks and internal inventory you are buying accuracy, not paperwork.

Washdown is where the sealing rating earns its money, and the indicator is usually the weak point rather than the deck. IP65 covers dust and a hose-down, which is enough for most warehouse and dock work. IP69K is the rating for high-pressure, high-temperature washdown, and it is the reason the Guardian Premium and the TI-700K exist as separate models rather than options. Food, beverage and pharmaceutical installations usually end up needing a stainless housing as well as the rating.

Temperature moves both zero and span. A scale calibrated on a warm dock will read differently in a freezer aisle or beside an oven, and condensation on a scale moved between the two is a more common cause of failure than cold itself. Check the compensated range, not just the operating range: they are different numbers and only one is a promise about accuracy.

Traffic and vibration are structural problems. A platform next to a punch press, a conveyor or a busy aisle will show it in the reading, and the answer is mounting rigidity and a level, solid floor first, then filtering. Filtering an unstable reading only hides the instability. Electrical noise is answered with shielded cable, one grounding point, and keeping the run away from motors and drives.

If an operator reads the display and writes it down, any indicator will do and you should buy on legibility and sealing instead. Everything past that point is a data decision, and it is cheaper to make it now than to retrofit.

USB and RS-232 are what shipping, ERP and inventory software still expect, and they are the difference between a weight that is captured and a weight that is typed twice. Our shipping scales carry both as standard for that reason.

Wireless comes in two distinct flavours that are easy to confuse. An RF link between platform and indicator removes the cable across the floor, which is the one that gets cut by traffic, while the operator still reads a normal indicator. Bluetooth to a phone or tablet removes the indicator itself, which is what makes portable weigh beams practical in a yard.

Then check the paperwork the reading has to produce. A printed ticket, an accumulated total across several pallets, or a postal rate calculated at the scale are all indicator features rather than platform features, so they can change which readout you order on the same deck. If you already own a platform, that is the cheap upgrade path: keep the deck and change the indicator.