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Standard

Exhaust Gas Temperature Instruments

2008-02-16
AS428
The exhaust gas temperature instruments covered by this standard are of the electrical servo null balance type, actuated by a varying emf output of one or more parallel connected Chromel-Alumel thermocouples.
Standard

Pressure Ratio Instruments

2008-02-16
ARP427A
This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the Indicator.
Standard

PRESSURE RATIO INSTRUMENTS

1991-05-01
ARP427
This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the Indicator.
Standard

CARBON MONOXIDE DETECTOR INSTRUMENTS

1991-05-01
AS412A
This Aeronautical Standard covers the basic type of carbon monoxide detector instrument used to determine toxic concentrations of carbon monoxide by the measurement of heat changes through catalytic oxidation.
Standard

CARBON MONOXIDE DETECTORS, (SIGNAL ASSEMBLY)

1948-11-01
AS412
This specification covers the basic type of instrument for detection of toxic concentrations of carbon monoxide whose operation is based on measurement of heat changes through catalytic oxidation.
Standard

SMOKE DETECTORS

1947-07-01
AS400
This specification covers two basic types as follows: Type I Carbon Monoxide Type II Photo-Electric Cell
Standard

FIRE AND HEAT DETECTORS

1947-12-01
AS401
This specification covers the following basic types of instruments, or combinations thereof, intended for use in protecting aircraft power plant installations, auxiliary power plants, combustion heaters and other installation where fuel, oil or similar fires may occur.
Standard

FIRE AND HEAT DETECTORS

1949-10-01
AS401A
This specification covers the following basic types of instruments, or combinations thereof, intended for use in protecting aircraft power plant installations, auxiliary power plants, combustion heaters and other installation where fuel, oil or similar fires may occur.
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