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Changes for page Sensor Module

Last modified by Heimir Thordarson on 2026/07/05 12:56
From version 38.5
edited by Heimir Thordarson
on 2026/01/26 17:27
Change comment: There is no comment for this version
To version 41.2
edited by Heimir Thordarson
on 2026/01/26 17:42
Change comment: There is no comment for this version

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... ... @@ -95,7 +95,26 @@
95 95  {{/mathjax}}
96 96  )))
97 97  
98 -* {{mathjax}}\(\beta\){{/mathjax}} = material constant that defines the steepness of its resistance-temperature curve between two temperature points, usually 25/85 degrees celsius. In this case it is 3694 //**K**//
98 +where:
99 +
100 +* {{mathjax}}\(\beta\){{/mathjax}} = material constant that defines the steepness of its resistance-temperature curve between two temperature points, usually 25/85 degrees celsius. In this case it is 3694 //**K.**//
99 99  * {{mathjax}}\(T_0\){{/mathjax}} = The test temperature at which the thermistor is 10k {{mathjax}}\(\Omega\){{/mathjax}}, which in this case is 25 degrees celsius.
100 100  * {{mathjax}}\(R_0\){{/mathjax}} = The resistance of the thermistor when it is 25 degrees celsius.
101 -* {{mathjax}}\(R_T\){{/mathjax}} = Resistance of the thermistor
103 +* {{mathjax}}\(R_T\){{/mathjax}} = The current resistance of the thermistor.
104 +
105 +==== Filtering ====
106 +
107 +Considering that the sensor can only promise a reaction time of 5 seconds when in water, it can be assumed that a heavy filter will not add any problematic latencies. To ensure a low cost, the filter uses common components which will filter any noise above the inverter switching noise.
108 +
109 +(% style="font-size: 1.5em;" %)
110 +(((
111 +{{mathjax}}
112 +$$
113 +F_c = \frac{1}{2 \pi R C}
114 +$$
115 +{{/mathjax}}
116 +)))
117 +
118 +Where:
119 +
120 +* {{mathjax}}\(F_c\){{/mathjax}} = cut-off frequency of the filter. Any noise with a frequency above this will be