Microelectronics probe for automatic, simultaneous control and monitoring of several chemical physical parameters of liquid substances, and their transmission to remote stations

TL;DR: In this paper, a miniature, lightweight, inexpensive, environmental monitoring system containing a number of sensors that can simultaneously and continuously monitor fluorescence, absorbance, conductivity, temperature, and several ions is presented.

TL;DR: A testing system for continuous sampling and testing of effluent at a water treatment plant, the system comprising: a sampling system to collect samples of the effluent; a monitoring system (40) connected to the sampling system, for measuring environmental parameters of the samples, the monitoring system consisting: a first analysis chamber (41) for measuring Environmental parameters of at least two selected from the group consisting of: pH, oxidation reduction potential (ORP) value for state of reduction oxidation (Redox), conductivity value for total dissolved solids (TDS), dissolved oxygen (DO),

TL;DR: In this article, the authors present an analysis system for analyzing a liquid sample, in particular water or a biological solution such as a drop of blood, of the consumable type and comprising a substrate on which is deposited a set of sensors (10) comprising at least one first sensor (11) for measuring the pH of the liquid sample.

TL;DR: In this article, a system is described in which a concentration of hydrogen ion, concentration of a variety of ions, oxidation reduction potential (ORP), and a temperature can be measured simultaneously through six channels, a computer controls for such a measurement, and the measured data is collected and analyzed by the computer.

TL;DR: In this paper, the authors present a sensor apparatus that includes on a nonconducting substrate (11) electrically conductive pathways (20, 22, 24) leading to at least two analyte electrodes (32, 34) and one reference electrode (36).

TL;DR: An improved electronic wiring board having a thermistor and at least one blood gas sensor supported, in close relation, one to the other, on one side of the board and a heater supported on the other side, to provide heat in response to temperature sensed by the thermistor, is presented in this article.

Abstract: A multiple electrode conductivity sensor generates an output to be applied to a special temperature compensation system that responds to a temperature sensor signal indica­ tive of the sample water temperature. The temperature signal selectively operates a memory unit that contains separate water and salt correction values to be used in adjusting the measured conductivity output. The water correction value re­ presents the conductivity of absolutely pure water at the measured temperature, and this value can be subtracted from the measured total conductivity to produce a con­ ductivity value attributable only to salt impurities. The salt correction signal from the memory unit is then used to scale the measured salt conductivity signal at the standard refer­ ence temperature of 25°C, thereby achieving a corrected salt conductivity measurement that can be added to a fixed pure water correction signal representative of the conductivity of pure water at that temperature. The sum of these values yields an adjusted output signal that accurately reflects the conductivity (or resistivity) of the pure water solution at the standard 25°C temperature. To avoid inaccuracies due to el­ ectrode deposits, the excitation voltage applied across the current electrodes of a four electrode conductivity sensor is monitored to produce a warning whenever the sensor circu­ itry nears the limit of its ability to overcome the effect of ac­ cumulated deposits, thus alerting the operator to the need for cleaning the electrodes before substantial inaccuracies can occur.

TL;DR: In this article, a real-time water quality measurement system is proposed to make measurement in real time by providing a measuring part for water temp., chlorine content, amt. of dissolved oxygen and pH, a measuring parts for COD (chemical oxygen demand) and SS (suspended solid content) and processing the measured values thereof in a centralized data processing part.