diff --git a/slic/core/sensor/__init__.py b/slic/core/sensor/__init__.py
index b0338c41..f92a75d4 100644
--- a/slic/core/sensor/__init__.py
+++ b/slic/core/sensor/__init__.py
@@ -1,6 +1,19 @@
 
+# single channel
 from .sensor import Sensor
 from .bssensor import BSSensor
 from .pvsensor import PVSensor
 
+# combining channels pulse by pulse
+from .bscombined import BSCombined
+from .bsnorm import BSNorm
+
+# combining sensors step by step
+from .combined import Combined
+from .norm import Norm
+
+# sensor monitoring like strip charts
+# (note that BSMonitor is the equivalent of epics monitors for BS channels)
+from .monitor import Monitor
+