diff --git a/src/hdc1000/hdc1000.hpp b/src/hdc1000/hdc1000.hpp
index cf3e56e6..2bcb5d55 100644
--- a/src/hdc1000/hdc1000.hpp
+++ b/src/hdc1000/hdc1000.hpp
@@ -83,7 +83,7 @@ namespace upm {
  * of an ultra-compact package. The sensing element of the HDC1000 is placed on
  * the bottom part of the device, which makes the HDC1000 more robust against
  * dirt, dust, and other environmental contaminants. The HDC1000 is functional
- * within the full -40°C to +125 °C temperature range.
+ * within the full -40 to +125 [degC] temperature range.
  *
  * @snippet hdc1000.cxx Interesting
  */
diff --git a/src/mma8x5x/mma8x5x.hpp b/src/mma8x5x/mma8x5x.hpp
index 05844f63..d3d48898 100644
--- a/src/mma8x5x/mma8x5x.hpp
+++ b/src/mma8x5x/mma8x5x.hpp
@@ -337,7 +337,7 @@ typedef struct {
  * accelerometer with 10/12/14 bits of resolution. These accelerometer
  * are packed with embedded functions with flexible user-programmable
  * options configurable to two interrupt pins. The MMA8X5X have user-selectable
- * full scales of ±2g/±4g/±8g.
+ * full scales of +-2g/+-4g/+-8g.
  *
  * @snippet mma8x5x.cxx Interesting
  */
diff --git a/src/tmp006/tmp006.hpp b/src/tmp006/tmp006.hpp
index a260fc6b..a3f0f3a4 100644
--- a/src/tmp006/tmp006.hpp
+++ b/src/tmp006/tmp006.hpp
@@ -114,10 +114,10 @@ namespace upm {
  * reported with the on-chip die thermal sensor measurement through an I2C- and
  * SMBus-compatible interface. With this data, the target object temperature
  * can be calculated by an external processor.
- * The Infrared thermopile sensor is specified to operate from –40°C to +125°C.
- * It is possible to measure an object temperature beyond the device operating
- * range as long as the device itself does not exceed the operating temperature
- * range (–40°C to +125°C).
+ * The Infrared thermopile sensor is specified to operate from 
+ * –40 to +125 [degC]. It is possible to measure an object temperature beyond
+ * the device operating range as long as the device itself does not exceed the
+ * operating temperature range (–40 to +125 [degC]).
  *
  * @snippet tmp006.cxx Interesting
  */