diff --git a/content/zettels/force_sensors.md b/content/zettels/force_sensors.md
index 3d3546a..fd5b33e 100644
--- a/content/zettels/force_sensors.md
+++ b/content/zettels/force_sensors.md
@@ -17,9 +17,9 @@ There are two main technique for force sensors:
 
 The choice between the two is usually based on whether the measurement is static (strain gauge) or dynamics (piezoelectric).
 
-Main differences between the two are shown in Figure [1](#org140fe11).
+Main differences between the two are shown in Figure [1](#org3f24e8f).
 
-<a id="org140fe11"></a>
+<a id="org3f24e8f"></a>
 
 {{< figure src="/ox-hugo/force_sensor_piezo_vs_strain_gauge.png" caption="Figure 1: Piezoelectric Force sensor VS Strain Gauge Force sensor" >}}
 
@@ -29,7 +29,7 @@ Main differences between the two are shown in Figure [1](#org140fe11).
 
 ### Dynamics and Noise of a piezoelectric force sensor {#dynamics-and-noise-of-a-piezoelectric-force-sensor}
 
-An analysis the dynamics and noise of a piezoelectric force sensor is done in ([Fleming 2010](#orgef1d5b9)) ([Notes]({{< relref "fleming10_nanop_system_with_force_feedb" >}})).
+An analysis the dynamics and noise of a piezoelectric force sensor is done in ([Fleming 2010](#org0a029b5)) ([Notes]({{< relref "fleming10_nanop_system_with_force_feedb" >}})).
 
 
 ### Manufacturers {#manufacturers}
@@ -60,19 +60,20 @@ Thus, if a voltage amplifier is used, no change of voltage will be experienced.
 However, if a charge conditioner is used, the signal will be doubled.
 
 
-## Load Cells {#load-cells}
+## Strain Gauge (Load Cells) {#strain-gauge--load-cells}
 
 
 ### Manufacturers {#manufacturers}
 
-| Manufacturers | Links                                                       | Country        |
-|---------------|-------------------------------------------------------------|----------------|
-| Sensel        | [link](https://www.sensel-measurement.fr/en/3-load-cell)    | France         |
-| Omega         | [link](https://www.omega.com/en-us/resources/load-cells)    | United Kingdom |
-| Megatron      | [link](https://www.megatron.de/en/category/load-cells.html) | Germany        |
-| PCB           | [link](https://www.pcb.com/products/product-finder?tx=19)   | USA            |
+| Manufacturers | Links                                                                     | Country        |
+|---------------|---------------------------------------------------------------------------|----------------|
+| Sensel        | [link](https://www.sensel-measurement.fr/en/3-load-cell)                  | France         |
+| Omega         | [link](https://www.omega.com/en-us/resources/load-cells)                  | United Kingdom |
+| Megatron      | [link](https://www.megatron.de/en/category/load-cells.html)               | Germany        |
+| PCB           | [link](https://www.pcb.com/products/product-finder?tx=19)                 | USA            |
+| Interface     | [link](https://quickship.interfaceforce.com/product-category/load-cells/) | USA            |
 
 
 ## Bibliography {#bibliography}
 
-<a id="orgef1d5b9"></a>Fleming, A.J. 2010. “Nanopositioning System with Force Feedback for High-Performance Tracking and Vibration Control.” _IEEE/ASME Transactions on Mechatronics_ 15 (3):433–47. <https://doi.org/10.1109/tmech.2009.2028422>.
+<a id="org0a029b5"></a>Fleming, A.J. 2010. “Nanopositioning System with Force Feedback for High-Performance Tracking and Vibration Control.” _IEEE/ASME Transactions on Mechatronics_ 15 (3):433–47. <https://doi.org/10.1109/tmech.2009.2028422>.