Alarm systems. Intrusion and hold-up systems - Requirements for combined passive infrared and ultrasonic detectors Ingestion-build-51215 utensils and glassware

utensils and glassware

and operation of the transformer should also be considered

9 Centring device

Hemispherical transmittance factor with specular included

BS 3907-4 covers apparatus and solvent required for testing as well as test sampling and procedure to determine manganese

Alarm systems. Intrusion and hold-up systems - Requirements for combined passive infrared and ultrasonic detectors Ingestion-build-51215 utensils and glassware1 Scope This European Standard is for combined passive infrared and ultrasonic detectors installed in buildings and provides for security grades 1 to 4 (see EN 501311), specific or non specific wired or wire free detectors, and uses environmental classes I to IV (see EN 501305). This standard does not include requirements for combined passive infra red and ultrasonic detectors intended for use outdoors. A detector shall fulfil all the requirements of