Monitor nozzle

1.A nozzle capable of turning completely round in a horizontal plane and having a limited play in a vertical plane, used in hydraulic mining, fire-extinguishing apparatus, etc.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
It consists of flame, smoke, and gas detectors, emergency shut down stations, spill impoundment with sump pumps, and monitor nozzles. The flame, smoke, and gas detectors are strategically located throughout the plant to detect fire, smoke, and natural gas and are wired to send a signal to the SCADA system.
Although the monitor nozzles have been dry for almost a hundred years, nature has continued the erosion begun by man.