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Honeywell offers a number of products and services across its four business groups: Aerospace, Home and Building Technologies (HBT), Safety and Productivity Solutions (SPS), and Performance Materials and Technologies (PMT). This is a partial list of products manufactured and services offered by Honeywell.
Honeywell was a component of the Dow Jones Industrial Average index from 1999 to 2008. Prior to 1999, its corporate predecessors were included dating back to 1925, including early entrants in the computing and thermostat industries. [7] [8] In 2020, Honeywell rejoined the Dow Jones Industrial Average index. [9]
The Honeywell T87 Round Thermostat is a thermostat that Honeywell International, Inc. first manufactured in 1953. [1]
A metal ball and contact wires can directly replace it, but may require additional circuitry to eliminate switch bounce. Low-precision thermostats use a bimetal strip and a switch contact. Precision thermostats use a thermistor or silicon temperature sensor. Low-cost accelerometers replace the mercury tilt switch in precision applications.
A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.
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This regulation is now carried out by an internal thermostat. Conveniently, both the sensing element of the thermostat and its control valve may be placed at the same location, allowing the use of a simple self-contained non-powered thermostat as the primary device for the precise control of engine temperature. [2]
Reduced pressure zone device connected to a fire hydrant. A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination.