The R131-124-000 is a water-tight fiberglass polyester enclosure from the R131 PolyTOP & PolyDOOR range, fitted with integrated hinges and an acrylic window in the lid. It is designed for use as an instrument enclosure, electrical junction box or terminal wiring enclosure, and the window lets technicians read meters or check indicators without opening the housing. At 260 mm long on a 120 mm width, it is the longest of the 120 mm-wide windowed versions, useful for longer DIN-style terminal rows or elongated instrument layouts.

Construction is two piece molded fiberglass reinforced polyester in a light beige finish (RAL 7032, Pantone 413). A recessed neoprene gasket with tongue and groove construction resists oil and petroleum, and the enclosure is impervious to atmospheric and marine corrosion. Spring loaded stainless steel hinge pins are standard, so the lid can be removed quickly for wiring.

The enclosure measures 120 mm wide, 260 mm long and 100 mm deep (4.72 in x 10.24 in x 3.94 in as listed L x W x H) and ships at 3.5 lbs (1.59 kg). Captive polyamide cover screws with a slot head fasten into pre-threaded holes, and those threaded holes also provide single channel access to the rear mounting positions, keeping wall fixings outside the gasket seal. Four stainless steel M6 inserts in the bottom allow internal mounting (screws not included).

The R131-124-000 is rated NEMA Type 1, 2, 3, 3R, 4, 4X, 5, 12 and 13, IP66, carries a UL94 V-0 flammability rating and is CSA certified Type 4 for use with industrial control equipment. It is RoHS and REACH compliant.