sealed instrument

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Noun1.sealed instrument - a contract that is signed and has the (wax) seal of the signer attached
contract - a binding agreement between two or more persons that is enforceable by law
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Belting must be white butyl; Collars must be capable of being refurbished; Collars must be capable of storing 100,000 fixes in nonvolatile flash memory in association with other sensor data; VHF transmitter must have an operating temperature range of -40 degrees Celsius to 70 degrees Celsius; Iridum antenna must be installed in a high impact nonconductive plastic housing that has sloping sides to reduce chewing and gnawing; Antenna cable must be armored to protect the connection between the Iridum module and the sealed instrument package; Vendor will provide software to program, download, and convert the data into text or comma separated value files.
A sealed instrument panel inside the cab displays warning, indicator and diagnostic functions of the H series wheel loaders.
While designing their 9A1990 liquid oxygen level gauges for high-altitude military transports, the design engineers at Transicoil Inc, Norristown, PA, were challenged to find a method for mechanically adjusting a hermetically sealed instrument from the outside--without breaching the seal.