Abstract: A waterproof electrical connector assembly releasably connects an electrical cable to a second cable, or to one or more electrodes or sensors in a housing that has a bore therethrough that accommodates the electrical cable on one end and a fitting on the other end. The fitting holds one or more electrodes/sensors in a bore through the fitting. The fitting is a commercially-available male-threaded polymeric fitting of the type used in High-performance Liquid Chromatography (HPLC) applications. This type of polymeric fitting has a conical, or tapered, ferrule portion at one end that is configured to fit securely into a female-threaded and chamfered bore in the housing so that when the fitting is tightened against the chamfered housing bore it forms a watertight seal which is waterproof to at least 10,000 psi. As the seal is formed, the components contact each other to form an electrical connection, illustratively, a connection from electrode or sensor probes to the cable leading to measuring equipment.

Abstract: A system for monitoring and controlling electrical devices has a local central processor with memory for storing an operating and control systems for controlling analog or digital sensors, instruments, and devices. A web browser interfaces with a communications system to exchange data with the local central processor. External hardware couples to the local central processor via an inter integrated circuit interconnection system. Plural sensors and instruments couple to the local central processor, and are controlled over the internet. Electrical devices include any combination of temperature sensors, potentiometric sensors, oceanographic sensors and instruments, industrial sensors and instruments, voltammetric sensors, light sensors, atmospheric sensors and instruments, water sensors, pH sensors, and amperometric sensors and instruments. Sensor data is stored in a removable data storage arrangement.

Abstract: A system for acquiring environmental data from a plurality of sensors is provided with a microprocessor having a sensor input for receiving data from a sensor, a memory access port for communicating with a memory system, and an output port for issuing data. Plural sensors each produce associated sensor signals responsive to respective characteristics of an environment. The sensor signals are propagated to the sensor input of the microprocessor, and a memory system is coupled to the memory access port of the microprocessor for storing calibration data associated with the plurality of sensors. A communications arrangement is coupled to the output port of the microprocessor.

Abstract: A system for monitoring and controlling electrical devices has a local central processor with memory for storing an operating and control systems for controlling analog or digital sensors, instruments, and devices. A web browser interfaces with a communications system to exchange data with the local central processor. External hardware couples to the local central processor via an inter integrated circuit interconnection system. Plural sensors and instruments couple to the local central processor, and are controlled over the internet. Electrical devices include any combination of temperature sensors, potentiometric sensors, oceanographic sensors and instruments, industrial sensors and instruments, voltammetric sensors, light sensors, atmospheric sensors and instruments, water sensors, pH sensors, and amperometric sensors and instruments. Sensor data is stored in a removable data storage arrangement.

Abstract: A light source arrangement for conducting spectroscopic analysis of a material to be analyzed has a first source of electromagnetic energy for issuing a first source electromagnetic energy having a first predetermined spectroscopic characteristic and a second source of electromagnetic energy for issuing a second source electromagnetic energy having a second predetermined spectroscopic characteristic. The light source arrangement is provided with a first port for emitting an output electromagnetic energy having an output spectral characteristic responsive to a selectable combination of the first and second predetermined spectroscopic characteristics. A holder secures the material to be analyzed in a first path of propagation of the output electromagnetic energy. A third port emits a first test electromagnetic energy having a first test spectral characteristic responsive to an interaction between the output electromagnetic energy and the material to be analyzed.

Abstract: A protective arrangement for a source of electromagnetic energy, such as an output light, is provided with a light port for issuing the output light and a displaceable shutter having a first position that overlies the light port and thereby limits access to the output light. In a second position, the displaceable shutter permits ready access to the light port. The displaceable shutter is arranged to default to the first position, whereby protection of personnel from the output light is effected. This can be achieved by configuring the displaceable shutter to be affected by gravity, or in environments where the equipment is portable or its orientation in use can be varied, by a resilient biasing element, such as a spring. An indicator arrangement is provided to provide indication that light is being emitted from the light port.

Abstract: A switching arrangement for optical fibers is provided with a plurality of first optical fibers and a plurality of second optical fibers. A photoemitter element is arranged to communicate optically with a selectable one of the plurality of first optical fibers, and a photodetector element communicates optically with a selectable one of the plurality of second optical fibers. A communications arrangement enables optical communication between the photoemitter and photodetector elements, and respectively selected ones of the first and second optical fibers simultaneously. The communications arrangement has a displaceable portion and a stationary portion. A drive arrangement is coupled to the displaceable portion of the communications arrangement. A controller is coupled to the drive arrangement for controlling a displacement of the displaceable portion of the communications arrangement. Displacement is effected along a linear path, or in other embodiments, along a circular path.

Abstract: A mercury drop arrangement tests electrochemically a sample solution, in a horizontal or vertical orientation, employing mercury which is delivered from a mercury reservoir to the test solution via a valve and mercury capillary tube. The mercury is valved to deliver one drop of mercury to the end of the capillary tube which is immersed in the sample solution. An electrochemical test of the sample solution can be performed when the mercury drop is in place, and if the mercury drop is not in place, the mercury in the capillary tube forms a microelectrode. The mercury capillary tube can easily be removed for replacement or cleaning when the valve is closed. Closing of the valve produces electrical isolation of the reservoir contents from the mercury in the mercury capillary tube, including the mercury drop itself. Such electrical isolation from the mercury reservoir precludes electrical noise generated in the reservoir from contaminating the voltammetric data.