A method of monitoring a polyolefin production process, comprising: placing one or more spectroscopic probes into a conduit of a polyolefin production system comprising: a reactor feed system configured to receive one or more feedstocks via a first set of conduits and to output one or more feedstreams via a second set of conduits; a polymerization reactor system configured to receive the one or more feedstreams via the second set of conduits and to output a reactor discharge via a third set of conduits, wherein the polymerization reactor system comprises a loop slurry reactor; a monomer recovery system configured to receive the reactor discharge via the third set of conduits and to output one or more recovered components via a fourth set of conduits and a polymer fluff via a fifth set of conduits; wherein the one or more spectroscopic probes are placed in at least one of the third and fourth set of conduits and are configured to acquire a spectroscopic signal in substantially real time, wherein the one or more spectroscopic probes comprise Raman probes; the polyolefin production system having conduit contents comprising at least one of the one or more feedstocks, the one or more feed streams, the reactor discharge, the one or more recovered components, a purified component, the polymer fluff, an extruder feed, and a polymer pellet stream; exposing the conduit contents to a radiation emission from the one or more spectroscopic probes; acquiring a spectroscopic signal in substantially real-time from the conduit contents in response to the radiation emission via the one or more spectroscopic probes; analyzing the spectroscopic signal to determine at least one property of interest of a component of the conduit contents. a reactor feed system configured to receive one or more feedstocks via a first set of conduits and to output one or more feedstreams via a second set of conduits; a polymerization reactor system configured to receive the one or more feedstreams via the second set of conduits and to output a reactor discharge via a third set of conduits, wherein the polymerization reactor system comprises a loop slurry reactor; a monomer recovery system configured to receive the reactor discharge via the third set of conduits and to output one or more recovered components via a fourth set of conduits and a polymer fluff via a fifth set of conduits; wherein the one or more spectroscopic probes are placed in at least one of the third and fourth set of conduits and are configured to acquire a spectroscopic signal in substantially real time, wherein the one or more spectroscopic probes comprise Raman probes; the polyolefin production system having conduit contents comprising at least one of the one or more feedstocks, the one or more feed streams, the reactor discharge, the one or more recovered components, a purified component, the polymer fluff, an extruder feed, and a polymer pellet stream; exposing the conduit contents to a radiation emission from the one or more spectroscopic probes; acquiring a spectroscopic signal in substantially real-time from the conduit contents in response to the radiation emission via the one or more spectroscopic probes; analyzing the spectroscopic signal to determine at least one property of interest of a component of the conduit contents.