Abstract: An indicator for measuring the liquid content of a container comprises an attitude compensating sensor including at least two variable resistor assemblies disposed within the container. The resistor assemblies are located at opposite ends of the container and are electrically connected to each other in series. Each resistor assembly comprises a resistor disposed within a housing and in communication with a movable wall of said housing located near its lower end. The housing resides in proximity to the bottom wall of the container and registers with the external ambient through an opening provided in one wall thereof. The total resistance developed by the sensor comprises the sum of the resistances of the individual resistors, and remains constant for a particular quantity of liquid regardless of the distribution of the liquid within the container.

Abstract: A liquid container is provided with paired variable resistors fluidly connected to the container at opposite ends of the bottom thereof. The resistors are electrically interconnected in series, and the output comprising the sum of the resistances is directly received by an electric current-responsive measuring device. Each of the resistors is weight-responsive and varies individually according to local liquid depth, however, the total resistance for a particular quantity of liquid in the container is always constant. The indicator of the present invention is particularly useful for measuring liquid content in containers subject to movement and change in attitude, such as, for example, gasoline tanks in motor vehicles.

Abstract: A hollow capillary tube or cartridge is received within the interior of a hollow tubular syringe-like device to collect a blood sample. A fluid inlet means of the capillary cartridge connects in a fluid conductive relationship with a hypodermic needle attached to the syringe-like device to conduct a blood sample to the interior of the capillary cartridge. A fluid outlet means of the capillary cartridge allows the blood sample to fill the capillary cartridge by expelling air from the interior of capillary cartridge. The fluid outlet means includes a removable piece of fluid conductive fibrous material which allows the air to escape as the blood sample is received and which conducts a small amount of blood sample when the capillary cartridge is completely filled.