diff --git a/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb b/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
index f9884a3fc6cba0d042629d1fc3782aad2bb4e937..3c2a3f70eea7f04da425a1243e2a27e972dea821 100644
--- a/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
+++ b/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
@@ -136,8 +136,8 @@
    "source": [
     "# Read sensor size\n",
     "sensor_size = run_dir[instrument_src, 'data.image.dims'].as_single_value(reduce_by='first') # (x=768, y=708) expected\n",
-    "sensor_size = sensor_size[:2] # data.image.dims for old data is [768, 708, 1]\n",
-    "assert np.allclose(sensor_size, np.array([768, 708])), 'Unexpected sensor dimensions.' \n",
+    "sensor_size = sensor_size[sensor_size != 1] # data.image.dims for old data is [768, 708, 1]\n",
+    "assert np.array_equal(sensor_size, [768, 708]), 'Unexpected sensor dimensions.' \n",
     "\n",
     "# Path to pixels ADC values\n",
     "pixels_src = (instrument_src, \"data.image.pixels\")\n",
@@ -167,7 +167,7 @@
     "    \n",
     "# Read temperature    \n",
     "if fix_temperature == -1:\n",
-    "    temperature = np.mean(run_dir.get_array(instrument_src,\"data.backTemp\").values)/100.\n",
+    "    temperature = run_dir[instrument_src, 'data.backTemp'].ndarray().mean()/100.\n",
     "    temperature_k = temperature + 273.15\n",
     "    temp_str_add = ''\n",
     "else:\n",