Abstract: The invention provides a solid state reference electrode comprising a reference element embedded in an electrochemically active composite, the electrochemically active composite comprising a polymeric matrix loaded with a solid inorganic salt, wherein the polymeric matrix comprises a cross-linked vinyl polymer of a vinyl monomer containing a heteroatom.

Abstract: An apparatus system and method are provided for use in acquiring data from fluid within a region of material in a heap leaching application. The apparatus includes one or more sensor strings provided in a region of material to be analysed. Each sensor string includes a data cable and two or more solid-state sensors positioned along the length of the data cable. The sensors are adapted to periodically acquire sensor data relating to chemical properties of the fluid surrounding the sensor over a predetermined period of time and to transmit the sensor data via the data cable to one or more hubs.

Abstract: The invention provides a solid state reference electrode comprising a reference element embedded in an electrochemically active composite, the electrochemically active composite comprising a polymeric matrix loaded with a solid inorganic salt, wherein the polymeric matrix comprises a cross-linked vinyl polymer of a vinyl monomer containing a heteroatom.

Abstract: The invention is directed to a system for remote groundwater monitoring. The system includes one or more sensor modules configured for distribution in one or more groundwater monitoring wells. Each sensor module is adapted to acquire multi-parameter sensor data from each groundwater monitoring well. The multi-parameter sensor data includes electrochemical property data and electrical property data of groundwater in each groundwater monitoring well. One or more hubs are coupled to the one or more sensor modules for retrieving the multi-parameter sensor data and wirelessly communicating with an online server to upload the multi-parameter sensor data to the online server.