diff --git a/py/hexagram/cluster.py b/py/hexagram/cluster.py
index b2bc895..8257486 100644
--- a/py/hexagram/cluster.py
+++ b/py/hexagram/cluster.py
@@ -10,7 +10,7 @@ from hexagram.dial    import Dial
 from hexagram.speedo  import Speedo
 from hexagram.tacho   import Tacho
 from hexagram.fuel    import FuelGauge
-from hexagram.thermo  import ThermoGauge
+from hexagram.thermo  import Thermometer
 
 class ShiftIndicator(Gauge):
     __slots__ = 'x', 'y', 'rpm_min', 'rpm_redline', 'rpm_max',
@@ -130,7 +130,7 @@ class Cluster():
                            self.HEIGHT / 2,
                            8000)
 
-        self.thermo = ThermoGauge(self.WIDTH - self.HEIGHT / 2,
+        self.thermo = Thermometer(self.WIDTH - self.HEIGHT / 2,
                                   self.HEIGHT / 2,
                                   self.HEIGHT / 2)
 
diff --git a/py/hexagram/thermo.py b/py/hexagram/thermo.py
index 51ab33f..11e0b9f 100644
--- a/py/hexagram/thermo.py
+++ b/py/hexagram/thermo.py
@@ -4,10 +4,10 @@ import cairo
 
 from hexagram.dial import BottomDial
 
-class ThermoGauge(BottomDial):
     MIN_ANGLE = 144.0 * (math.pi / 180.0)
     MAX_ANGLE = 216.0 * (math.pi / 180.0)
 
+class Thermometer(BottomDial):
     MIN_VALUE  =  85
     MAX_VALUE  = 110
     WARN_VALUE = 106