Abstract:
THE PRESENT INVENTION RELATES TO AN APPARATUS AND A METHOD FOR CONTROLLING AND MONITORING NUTRIENT SOLUTION TO BE SUPPLIED TO A PLANT. IN OPERATION, ALL SENSORS OF THE PRESENT INVENTION ARE USED FOR MONITORING THE ENVIRONMENTAL PARAMETERS. THE ENVIRONMENTAL PARAMETERS WILL BE EXTRACTED AND SENT TO THE WORKSTATION THROUGH WIRES OR WIRELESS. AFTER THE ENVIRONMENTAL PARAMETERS EXTRACTION, A BUFFER SOLUTION SUCH AS DEIONIZED WATER IS PASSING THROUGH THE MICROCHANNEL TO RINSE MONITORING SENSOR OF THE PRESENT INVENTION FROM WASH BUFFER (138). BUFFER SOLUTIONS AFTER THE RINSING PROCESS WILL BE CHANNELED TO THE WASTE BUFFER (136).
Abstract:
AN MTEGRATED ION SENSITIVE FIELD EFFECT TRANSISTOR SENSOR 5 A CHEMICAL SENSOR HAVING AN ION SENSITIVE FIELD EFFECT TRANSISTOR (ISFET) COMPRISING A SUBSTRATE (10) SITUATED WITH A SOURCE (4) AND A DRAIN (3); AN ION SENSING GATE (5) DISPOSED BETWEEN THE SOURCE AND THE DRAIN; AN ION-SENSITIVE FILM (1) FORMED ON THE SURFACE OF THE SUBSTRATE AND THE ION SENSING GATE-, AN ELECTRODE DOMAIN (6) FORMED ON 10 THE ION-SENSITIVE FILM SURROUNDING THE PERIPHERY OF THE ION SENSING GATE (5) CHARACTERIZED IN THAT THE ELECTRODE DOMAIN (6) IS MADE OF TUNGSTEN, TITANIUM OR TUNGSTEN SILICIDE. (MOST ILLUSTRATED BY
Abstract:
A chemical sensor having an ion sensitive field effect transistor (ISFET) comprising a substrate (10) situated with a source (4) and a drain (3); an ion sensing gate (5) disposed between the source and the drain; an ion-sensitive film (1) formed on the surface of the substrate and the ion sensing gate; an electrode domain (6) formed on the ion-sensitive film surrounding the periphery of the ion sensing gate (5) characterized in that the electrode domain (6) is made of tungsten, titanium or tungsten suicide.