diff --git a/project/main/data/get_data_helper.py b/project/main/data/get_data_helper.py
index e268c32..e54616a 100644
--- a/project/main/data/get_data_helper.py
+++ b/project/main/data/get_data_helper.py
@@ -1,6 +1,7 @@
 import datetime
 import math
-
+import dateutil.parser
+import dateutil.tz
 import project.main.exceptions as exceptions
 import project.main.same_function_helper as same_helper
 import project.main.util_helper as util_helper
@@ -77,9 +78,10 @@ def queryDBGasAverageMeasurement(qhawax_name, gas_name):
 
     qhawax_id = same_helper.getQhawaxID(qhawax_name)
     if qhawax_id != None:
-        initial_timestamp = datetime.datetime.now()
-        last_timestamp = datetime.datetime.now() - datetime.timedelta(hours=24)
-
+        initial_timestamp = datetime.datetime.now(dateutil.tz.tzutc()).replace(minute=0,second=0, microsecond=0)        
+        last_timestamp = (datetime.datetime.now(dateutil.tz.tzutc()) 
+                        - datetime.timedelta(hours=23)).replace(minute=0,second=0, microsecond=0)        
+        
         column_array = [
             AirQualityMeasurement.CO.label("sensor"),
             AirQualityMeasurement.H2S.label("sensor"),
@@ -96,14 +98,21 @@ def queryDBGasAverageMeasurement(qhawax_name, gas_name):
                     AirQualityMeasurement.timestamp_zone,
                     column_array[i],
                 )
-
-        return (
-            session.query(*sensors)
-            .filter(AirQualityMeasurement.qhawax_id == qhawax_id)
-            .filter(AirQualityMeasurement.timestamp_zone >= last_timestamp)
-            .filter(AirQualityMeasurement.timestamp_zone <= initial_timestamp)
-            .order_by(AirQualityMeasurement.timestamp_zone.asc())
-            .all()
+        series = session.query(
+                 db.func.generate_series(last_timestamp,initial_timestamp,
+                                         datetime.timedelta(hours=1)).label('timestamp_zone')).subquery()
+        values = session.query(*sensors).\
+              filter(AirQualityMeasurement.qhawax_id == qhawax_id).\
+              filter(AirQualityMeasurement.timestamp_zone >= last_timestamp).\
+              filter(AirQualityMeasurement.timestamp_zone <= initial_timestamp).\
+              subquery()
+        
+        return (            
+            session.query(values.c.sensor,series.c.timestamp_zone,
+            db.func.coalesce(values.c.sensor, 0)).\
+            outerjoin(series, values.c.timestamp_zone == series.c.timestamp_zone, full=True).\
+            order_by(series.c.timestamp_zone).\
+            all()
         )
     return None
 
diff --git a/project/main/util_helper.py b/project/main/util_helper.py
index 3d839a1..bd3a9ab 100644
--- a/project/main/util_helper.py
+++ b/project/main/util_helper.py
@@ -208,38 +208,13 @@ def areFieldsValid(data):
 def getFormatData(gas_average_measurement):
     gas_average_measurement_list = []
     if gas_average_measurement is not None:
-        data = exceptions.checkVariable_helper(gas_average_measurement, list)
-        next_hour = -1
+        data = exceptions.checkVariable_helper(gas_average_measurement, list)        
         for measurement in gas_average_measurement:
             gas_measurement = measurement._asdict()
-            hour = gas_measurement["timestamp_zone"].hour
-            if next_hour == -1:
-                gas_average_measurement_list.append(gas_measurement)
-                next_hour = hour + 1
-            else:
-                if hour == next_hour:
-                    gas_average_measurement_list.append(gas_measurement)
-                else:
-                    if (
-                        next_hour > hour
-                    ):  # si next_hour > hour => se resta con 24 horas
-                        diff_0 = abs(24 - next_hour)
-                        diff = diff_0 + hour
-                    else:
-                        diff = abs(hour - next_hour - 1)
-                    for i in range(1, diff + 1):
-                        new_variable = {
-                            "timestamp_zone": before_date
-                            + datetime.timedelta(hours=i),
-                            "sensor": "",
-                        }
-                        gas_average_measurement_list.append(new_variable)
-                    gas_average_measurement_list.append(gas_measurement)
-                next_hour = hour + 1
-            before_date = gas_measurement["timestamp_zone"]
-            if next_hour == 24:
-                next_hour = 0
-        return gas_average_measurement_list
+            if gas_measurement["sensor"] is None:
+                gas_measurement["sensor"]=""
+            gas_average_measurement_list.append(gas_measurement)
+        return gas_average_measurement_list        
     return None