diff --git a/eos/projection.py b/eos/projection.py
index 4acc62d..1f96d24 100644
--- a/eos/projection.py
+++ b/eos/projection.py
@@ -241,6 +241,7 @@ class LZProjection(ProjectionInterface):
         ref_lz *= norm.monitor/self.monitor
         ref_lz[np.logical_not(self.data.mask)] = np.nan
         self.data.norm = norm_lz
+        self.norm_monitor = norm.monitor
         self.data.ref = ref_lz
         self.calc_error()
         self.is_normalized = True
diff --git a/eos/reduction_reflectivity.py b/eos/reduction_reflectivity.py
index 6168c38..413ffb6 100644
--- a/eos/reduction_reflectivity.py
+++ b/eos/reduction_reflectivity.py
@@ -314,6 +314,7 @@ class ReflectivityReduction:
                 scale = self.config.reduction.scale[i]
             except IndexError:
                 scale = self.config.reduction.scale[-1]
+                # TODO: causes error if no '-s' argumnet is given
             proj.scale(scale)
 
             # projection on qz-grid
@@ -451,6 +452,9 @@ class ReflectivityReduction:
         proj.apply_norm_mask(self.norm, min_norm=self.config.reduction.normalizationFilter,
                              min_theta=self.config.reduction.normAngleFilter)
 
+        if self.monitor<=1e-6:
+            self.monitor = np.nan
+
         proj.project(dataset, self.monitor)
 
         if self.config.reduction.normalisationMethod == NormalisationMethod.over_illuminated:
@@ -465,7 +469,7 @@ class ReflectivityReduction:
         else:
             logging.error('unknown normalisation method! Use [u]nder, [o]ver or [d]irect illumination')
             proj.normalize_no_footprint(self.norm)
-        if self.monitor<=1e-6:
+        if self.monitor is np.nan:
             logging.info('                               low monitor -> nan output')
             proj.data.ref *= np.nan