WL9-2813 Engineering PP Precision Instrument Case

The outer shell is 280 x 240 x 130 mm and the internal cavity is 260 x 200 x 117 mm. Externally the case occupies 280 x 240 mm while the usable floor inside is 260 x 200 mm, the difference coming from the wall section, the seal channel and the moulded closing geometry rather than measurement error. Size a load from the inner dimensions, never from the outside, because outside figures overstate capacity. A 260 x 200 mm floor with 117 mm of inner height is a small-footprint, medium-depth combination that takes two rows of small instruments laid flat or a single row of probes standing up, and the 2.8 mm wall keeps the unit down to 800 g for benches where the case is passed around constantly.

The lid adds 25 mm of internal depth and the base adds 92 mm, giving 117 mm of combined inner height. The 25 mm lid is shallow, so instruments with cable connectors or bosses on top need clearance planned around them, while the 92 mm in the base keeps the deep cavity open enough to see small parts in and out.When judging whether a body suits your contents, read the base figure first, because it sets how tall an item can stand, while the lid figure decides how much headroom remains above it. Only the sum of the two is usable height, and when measuring a part, include handles, connectors and bosses, or the lid will press on it once closed.

The shell uses a sealed closure and provides an IP67 waterproof and dustproof rating. For instruments passed between benches, workshop dust is the everyday problem, and the sealed cavity keeps the inside clean so less time is spent wiping contents down after each opening. The rating applies to the sealed cavity of the case itself, so if you store moisture-sensitive contents, pair it with desiccant or a humidity management accessory and check the sealing face for trapped debris every time you close the lid, since a single trapped fragment undermines the seal.

The factory usage categories for WL9-2813 are precision instrument cases and hardware tool cases, under code 902. The 260 x 200 x 117 mm cavity suits a small meter, probes, gauges and matching hand tools as one set, and the 800 g weight makes it easy to pass between benches. Because the wall is 2.8 mm, it fits controlled-environment handling rather than heavy stacking or long-term outdoor exposure.

WL9-2813 is poly-bagged individually and packed 20 per carton measuring 560 x 490 x 665 mm. With each unit at 800 g the carton lands in the low twenties by gross weight, which is normal for manual handling, though in the warehouse it is still worth placing the thinner 2.8 mm bodies on the upper layers of a stack. To compare packing efficiency, divide carton volume by pieces per carton to get a per-unit shipping volume and set that against other models in the series; that makes cost per unit easier to judge on freight-sensitive orders. Carton breakdowns, pallet plans and container layouts can be supplied with the order.