Application Notes

Frost-proof level gages are essential for monitoring liquid ammonia levels in outdoor refrigeration vessels where ambient temperatures can drop well below freezing. NCI Frost Proof models use special visibility extensions to prevent frost buildup from obscuring the viewing area, with all stainless steel construction below -150 degrees F for cryogenic service down to -325 degrees F.

Refineries require lighting that meets Class I, Division 1 hazardous location standards for areas where flammable vapors may be present. The NCI Model EX20-1000 and EX99-LED explosion-proof lights are UL 844 listed, IP66 rated, and built with stainless steel housings — providing safe, reliable illumination for gage reading, maintenance, and inspection in hazardous process areas.

Food and beverage processors require sight glasses that meet sanitary standards — smooth internal surfaces, tri-clamp connections, and materials compatible with CIP (clean-in-place) procedures. NCI sanitary sightglass models feature stainless steel construction, tri-clamp end connections, and borosilicate glass for clear visual inspection of product flow and tank levels without contamination risk.

Steam boilers operating at high pressures and temperatures demand level gages built to withstand extreme conditions. NCI Model RH/TH high pressure gages are machined from solid bar stock with forged covers and tempered borosilicate glass, rated to 4000 PSI at 100 degrees F. Transparent models with external illuminators allow operators to clearly read levels even in low-light boiler rooms.

Chemical reactors handling corrosive or aggressive media require level gages with appropriate material selection and sealing. NCI offers chambers in 304SS, 316SS, Monel, and other alloys, with Teflon Lo-Flo gaskets and Mica shields for caustic or acid service. Large chamber models (RLC/TLC series) are available for boiling or surging liquids common in reactor applications.

Sight flow indicators provide a simple, reliable way to verify that flow is occurring in a pipeline — confirming pump operation, detecting air locks, and monitoring product clarity. NCI bulls-eye and full-view models are available in threaded and flanged connections, with options for PTFE-lined bodies for corrosive service and armored construction for high-pressure lines.