Abstract: An integrated luminescence sensor includes a light pipe in optical communication with a luminescence sensing layer. A source of excitation illumination is coupled to the light pipe and disposed to direct excitation illumination toward the sensing layer. A luminescent light detector is also coupled to the light pipe and is disposed to detect luminescent illumination luminescing from the sensing layer, which luminescence is related to interaction between the sensing layer and a substance of interest.

Abstract: An improved flow-through conductivity sensor is provided. The sensor includes a current return path that has a current return conductor. At least one toroid of the sensor is removed from the flow path and configured to interact with the current return conductor to provide an indication of conductivity. Additional aspects of the invention include disposing a pair of toroids about the current return conductor; disposing a toroid about the current return conductor and configuring the toroid as a transformer.

Abstract: An insertion-type process analytic sensor has a distal end that is configured to couple to a process and a proximal end that is configured to couple to the ambient environment. The sensor is constructed from materials that reduce the occurrence of vapor within the sensor as well as facilitate its venting through the proximal end. Additionally, aspects of the invention include selecting materials for internal components of the insertion-type process analytic sensor that provide little or no extractables even when vapor is present within the sensor.

Abstract: An improved flow-through conductivity sensor is provided. The sensor includes a current return path that has a current return conductor. At least one toroid of the sensor is removed from the flow path and configured to interact with the current return conductor to provide an indication of conductivity. Additional aspects of the invention include disposing a pair of toroids about the current return conductor; disposing a toroid about the current return conductor and configuring the toroid as a transformer.