A method for sampling and analyzing production fluid from an oil and gas well, the method comprising: receiving, into a first chamber of a container coupled to a production fluid conduit , production fluid from the production fluid conduit , the container having: a second chamber ; and a movable divider disposed between and in fluid communication with each of the first chamber and the second chamber ; wherein receiving production fluid into the first chamber comprises drawing production fluid into the first chamber at least by controlling a pressure source in fluid communication with the second chamber such that a force acting on the divider due to pressure within the second chamber is reduced to, and remains as production fluid is drawn into the first chamber , the method being characterized in that the force acting on the divider is less than but within 10% of a force acting on the divider due to pressure within the first chamber ; and wherein the method further comprises: expelling at least a portion of the received production fluid from the first chamber at least by controlling the pressure source such that a force acting on the divider due to pressure within the second chamber remains within 10% of a force acting on the divider due to pressure within the first chamber ; directing at least a first portion of the expelled production fluid to one or more sensors ; and capturing, with the one or more sensors , data indicative of one or more properties of at least a portion of the received production fluid. receiving, into a first chamber of a container coupled to a production fluid conduit , production fluid from the production fluid conduit , the container having: a second chamber ; and a movable divider disposed between and in fluid communication with each of the first chamber and the second chamber ; a second chamber ; and a movable divider disposed between and in fluid communication with each of the first chamber and the second chamber ; wherein receiving production fluid into the first chamber comprises drawing production fluid into the first chamber at least by controlling a pressure source in fluid communication with the second chamber such that a force acting on the divider due to pressure within the second chamber is reduced to, and remains as production fluid is drawn into the first chamber , the method being characterized in that the force acting on the divider is less than but within 10% of a force acting on the divider due to pressure within the first chamber ; and wherein the method further comprises: expelling at least a portion of the received production fluid from the first chamber at least by controlling the pressure source such that a force acting on the divider due to pressure within the second chamber remains within 10% of a force acting on the divider due to pressure within the first chamber ; directing at least a first portion of the expelled production fluid to one or more sensors ; and capturing, with the one or more sensors , data indicative of one or more properties of at least a portion of the received production fluid. expelling at least a portion of the received production fluid from the first chamber at least by controlling the pressure source such that a force acting on the divider due to pressure within the second chamber remains within 10% of a force acting on the divider due to pressure within the first chamber ; directing at least a first portion of the expelled production fluid to one or more sensors ; and capturing, with the one or more sensors , data indicative of one or more properties of at least a portion of the received production fluid. <EOS>