WL9-3315 Engineering PP Precision Instrument Case

The outer shell is 334 x 287 x 150 mm and the internal cavity is 303 x 224 x 135 mm. Externally the case occupies 334 x 287 mm while the usable floor inside is 303 x 224 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 303 x 224 mm floor with 135 mm of inner height is a mid-size, taller body, and the extra headroom over the 25 mm-lidded cases in the range lets an instrument stand complete with its connectors up.

The lid adds 35 mm of internal depth and the base adds 100 mm, giving 135 mm of combined inner height. A 35 mm lid over a 100 mm base splits the depth fairly evenly, so the cavity is neither too deep to reach into nor too shallow to clear connectors, which leaves more room for error in lining design.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. Taller bodies usually carry instruments complete, and the sealed cavity keeps dust from entering at the lid joint, which protects panels and knobs. 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 WL9-3315 are precision instrument cases and hardware tool cases, under code 908. The 303 x 224 x 135 mm cavity suits mid-size meters, control modules and tool sets, and the 1670 g weight with a 4.1 mm wall fits vehicle transport and site work. Where contents are light or the case is carried often, a thinner-walled body in the same series will bring the total weight down.

No fixed packaging arrangement is set for this model yet; the exported data records packaging as to be confirmed, so carton size and pieces per carton are settled when the order is placed. If the project has a limit on carton weight or on pallet layers, say so at quotation stage and the factory can work back from a target weight to a packing count and the matching carton. Until the arrangement is fixed, estimate transport volume and weight from the single-unit 334 x 287 x 150 mm size and 1670 g weight only, rather than borrowing a carton size from another model in the series, because the bodies differ and one layout does not substitute for the other.