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 (106a, 106b, 106c); and capturing, with the one or more sensors (106a, 106b, 106c), 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 (106a, 106b, 106c); and capturing, with the one or more sensors (106a, 106b, 106c), 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 (106a, 106b, 106c); and capturing, with the one or more sensors (106a, 106b, 106c), data indicative of one or more properties of at least a portion of the received production fluid.