摘要: The Beckman Instruments Fieldlab Dissolved Oxygen system is a portable unit designed to measure dissolved oxygen and temperature in situ in freshwater and saltwater. Dissolved oxygen is sensed with a platinum-silver polarographic ... 展开 The Beckman Instruments Fieldlab Dissolved Oxygen system is a portable unit designed to measure dissolved oxygen and temperature in situ in freshwater and saltwater. Dissolved oxygen is sensed with a platinum-silver polarographic membrane type probe. Three sensors are available:One is a glass unit for sterilized laboratory work;the other two are ruggedized units for in-situ or laboratory applications,and one includes a rubber diaphragm for pressure compensation. Temperature is sensed by an optional separate thermistor type probe which is used to set manually a temperature compensation dial on the face of the readout unit. Dissolved oxygen and temperature data are displayed on an analog panel meter and through an analog recorder output jack for dissolved oxygen alone. 收起