diff --git a/src/de/p1st/monitor/loggers/cpu.py b/src/de/p1st/monitor/loggers/cpu.py
index f6e9920..15c3c00 100644
--- a/src/de/p1st/monitor/loggers/cpu.py
+++ b/src/de/p1st/monitor/loggers/cpu.py
@@ -13,12 +13,15 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class CPULogger(Logger):
+    """
+    CPU load average (base class).
+    """
+
     def __init__(self,
                  warn_if_above: float = None,
                  warn_threshold: int = 1,
                  warn_data_range: int = 1,
                  ):
-
         critical_if_above = warn_if_above * 1.5
         super().__init__(warn_threshold,
                          warn_data_range,
diff --git a/src/de/p1st/monitor/loggers/drive.py b/src/de/p1st/monitor/loggers/drive.py
index 6f6b4f2..d0dd494 100644
--- a/src/de/p1st/monitor/loggers/drive.py
+++ b/src/de/p1st/monitor/loggers/drive.py
@@ -24,6 +24,10 @@ class IDException(Exception):
 
 
 class DriveLogger(Logger):
+    """
+    Drive temperature.
+    """
+
     def __init__(self,
                  uuid: str = None,
                  id_: str = None,
@@ -123,7 +127,8 @@ class DriveLogger(Logger):
         """
         returncode, stdout, stderr = execute_capture(['blkid', '-s', 'UUID', '-o', 'value', f'{device}'])
         if returncode != 0:
-            raise BlkidException(f'blkid failed for device {device} with returncode {returncode}\nstdout: {stdout}\nstderr: {stderr}')
+            raise BlkidException(
+                f'blkid failed for device {device} with returncode {returncode}\nstdout: {stdout}\nstderr: {stderr}')
 
         uuid = stdout.strip()
         if len(uuid) == 0:
@@ -135,7 +140,7 @@ class DriveLogger(Logger):
     @classmethod
     def get_temp_from_device(cls, device: Path) -> int:
         """
-        Use `smartctl` to get HDD/SSD temperature.
+        Use `smartctl` to get HDD/SSD/NVMe temperature.
 
         As reading SMART data wakes up standby HDD drives, we skip them.
 
diff --git a/src/de/p1st/monitor/loggers/drive_temp.py b/src/de/p1st/monitor/loggers/drive_temp.py
index a0352c5..a49bbc9 100644
--- a/src/de/p1st/monitor/loggers/drive_temp.py
+++ b/src/de/p1st/monitor/loggers/drive_temp.py
@@ -13,6 +13,10 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class DriveTempLogger(Logger):
+    """
+    Minimum and maximum temperature of multiple drives of the same type (e.g. HDDs or NVMes).
+    """
+
     def __init__(self,
                  type_: Literal['drivetemp', 'nvme'],
                  warn_if_above: int = None,
diff --git a/src/de/p1st/monitor/loggers/filesystem.py b/src/de/p1st/monitor/loggers/filesystem.py
index 9c84221..a51ea37 100644
--- a/src/de/p1st/monitor/loggers/filesystem.py
+++ b/src/de/p1st/monitor/loggers/filesystem.py
@@ -18,6 +18,10 @@ class NotMounted(Exception):
 
 
 class FilesystemLogger(Logger):
+    """
+    Disk usage.
+    """
+
     def __init__(self, uuid: str = None,
                  mountpoint: Path = None,
                  unmounted_ok: bool = False,
diff --git a/src/de/p1st/monitor/loggers/memory.py b/src/de/p1st/monitor/loggers/memory.py
index c575ed8..5ce4534 100644
--- a/src/de/p1st/monitor/loggers/memory.py
+++ b/src/de/p1st/monitor/loggers/memory.py
@@ -10,6 +10,10 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class MemoryLogger(Logger):
+    """
+    Used, cached and total memory.
+    """
+
     def __init__(self,
                  warn_if_above: float = 1.0,
                  warn_threshold: int = 1,
@@ -28,7 +32,7 @@ class MemoryLogger(Logger):
         used_mb = data[1]
         total_available_mb = data[3]
         used = used_mb / total_available_mb
-        message = f'Memory usage ist at {used_mb} MB of {total_available_mb} MB ({round(used*100,2)}%)'
+        message = f'Memory usage ist at {used_mb} MB of {total_available_mb} MB ({round(used * 100, 2)}%)'
         return WarnData(data[0], used, message)
 
     def read_data(self) -> list[any]:
diff --git a/src/de/p1st/monitor/loggers/network.py b/src/de/p1st/monitor/loggers/network.py
index b6a16bb..58eb484 100644
--- a/src/de/p1st/monitor/loggers/network.py
+++ b/src/de/p1st/monitor/loggers/network.py
@@ -14,6 +14,10 @@ from de.p1st.monitor.warn import WarnLevel, WarnMessage
 
 
 class NetworkLogger(Logger):
+    """
+    Network bytes sent and received.
+    """
+
     def __init__(self, network_interface: str):
         super().__init__()
         self.network_interface = network_interface
diff --git a/src/de/p1st/monitor/loggers/sensor_script.py b/src/de/p1st/monitor/loggers/sensor_script.py
index cded3a9..190efc1 100644
--- a/src/de/p1st/monitor/loggers/sensor_script.py
+++ b/src/de/p1st/monitor/loggers/sensor_script.py
@@ -10,6 +10,10 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class ScriptLogger(Logger):
+    """
+    Single value returned by specified script.
+    """
+
     def __init__(self, command: list[str],
                  sensor_name: str,
                  warn_if_above: float = None,
diff --git a/src/de/p1st/monitor/loggers/swap.py b/src/de/p1st/monitor/loggers/swap.py
index 2c37993..1ff6fd6 100644
--- a/src/de/p1st/monitor/loggers/swap.py
+++ b/src/de/p1st/monitor/loggers/swap.py
@@ -11,6 +11,10 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class SwapLogger(Logger):
+    """
+    Used and total swap.
+    """
+
     def __init__(self,
                  warn_if_above: float = 1.0,
                  warn_threshold: int = 1,
diff --git a/src/de/p1st/monitor/loggers/temp.py b/src/de/p1st/monitor/loggers/temp.py
index cfe4142..c2e5f0a 100644
--- a/src/de/p1st/monitor/loggers/temp.py
+++ b/src/de/p1st/monitor/loggers/temp.py
@@ -11,6 +11,10 @@ from de.p1st.monitor.warn_data import WarnData
 
 
 class TempLogger(Logger):
+    """
+    Temperature of sensor.
+    """
+
     def __init__(self, sensor_name: str,
                  sensor_label: str,
                  warn_if_above: float = None,