I suspect you are attempting to access the values on the page?
The request is recieving 5700 characters because that is exactly the size of the HTML
HOWEVER - the html for http://alloy.geocom.cl/
does NOT contain any of the data - the data on that page is populated via a SCRIPT and the data actually comes from http://alloy.geocom.cl/xml/dynamic/merge.xml?svTrack=&dataLogger=&ioConfig=&power=&conn_status=
e.g...
so if you instead access that URL and convert from XML to JS object, you can access all the values (and there are lots - happy hunting)
Demo flow...
[{"id":"879b872b.68ec38","type":"inject","z":"1062d7f9.08a808","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":700,"y":80,"wires":[["94a468af.1286c8"]]},{"id":"69db9d72.bd3134","type":"debug","z":"1062d7f9.08a808","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":1050,"y":140,"wires":[]},{"id":"94a468af.1286c8","type":"http request","z":"1062d7f9.08a808","name":"","method":"GET","ret":"txt","paytoqs":"ignore","url":"http://alloy.geocom.cl/xml/dynamic/merge.xml?svTrack=&dataLogger=&ioConfig=&power=&conn_status=","tls":"","persist":false,"proxy":"","authType":"","x":860,"y":80,"wires":[["a64020e7.94b56","550c6da9.4faa44"]]},{"id":"a64020e7.94b56","type":"xml","z":"1062d7f9.08a808","name":"","property":"payload","attr":"","chr":"","x":890,"y":140,"wires":[["69db9d72.bd3134"]]},{"id":"550c6da9.4faa44","type":"debug","z":"1062d7f9.08a808","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":1050,"y":80,"wires":[]}]