diff --git a/src/translators/crate.py b/src/translators/crate.py
index ff5379bf..a66613a8 100644
--- a/src/translators/crate.py
+++ b/src/translators/crate.py
@@ -1,4 +1,5 @@
 import json
+import logging
 from contextlib import contextmanager
 from crate import client
 from crate.client import exceptions
@@ -13,7 +14,7 @@
     NGSI_LD_GEOMETRY, TIME_INDEX, METADATA_TABLE_NAME, FIWARE_SERVICEPATH
 import logging
 from .crate_geo_query import from_ngsi_query
-from utils.cfgreader import EnvReader, StrVar, IntVar, FloatVar
+from utils.cfgreader import EnvReader, StrVar, IntVar, FloatVar, FloatRangeVar
 from utils.connection_manager import ConnectionManager
 
 # CRATE TYPES
@@ -58,7 +59,7 @@ def setup(self):
         # Added backoff_factor for retry interval between attempt of
         # consecutive retries
         backoff_factor = EnvReader(log=logging.getLogger(__name__).debug) \
-            .read(FloatVar('CRATE_BACKOFF_FACTOR', 0.0))
+            .read(FloatRangeVar('CRATE_BACKOFF_FACTOR', 0.0))
         if self.connection is None:
             try:
                 self.connection = client.connect(
diff --git a/src/utils/cfgreader.py b/src/utils/cfgreader.py
index 7704ff82..ad9c2ce2 100644
--- a/src/utils/cfgreader.py
+++ b/src/utils/cfgreader.py
@@ -79,6 +79,19 @@ def _do_read(self, rep: str) -> float:
         return float(rep)
 
 
+class FloatRangeVar(EVar):
+    """
+    An env value parsed as a FloatRange. Value of "CRATE_BACKOFF_FACTOR"
+    expected to be in range of 0 to 120 otherwise it will raise Value error.
+    """
+
+    def _do_read(self, rep: str) -> float:
+        backoff_factor = int(os.environ.get('CRATE_BACKOFF_FACTOR'))
+        if backoff_factor not in range(0,120):
+            raise ValueError('value out of range: {}'.format(backoff_factor))
+        return float(rep)
+
+
 class BoolVar(EVar):
     """
     An env value parsed as a boolean. It evaluates to true just in case the