turgut kalfaoglu
- Apr 10, 2015
- 12
- Joined
- Apr 10, 2015
- Messages
- 12
Hi. I have a very old aquarium thermostat - but it still works. I'm trying to figure out HOW it works 
It has a female plug midway, and you plug an aquarium heater there. then you turn the yellow rod to adjust the temperature. When the temperature is reached, the light comes on. When the temp is too low and the heater is working, the light is off. How the heck does this thing work..The way it works seems counter-intuitive -- the metal coil expands when it's too hot, touches the rod, and that stops the current flowing. However that should CLOSE the circuit and actually make the current flow, no?
Attaching some photos..
It has a female plug midway, and you plug an aquarium heater there. then you turn the yellow rod to adjust the temperature. When the temperature is reached, the light comes on. When the temp is too low and the heater is working, the light is off. How the heck does this thing work..The way it works seems counter-intuitive -- the metal coil expands when it's too hot, touches the rod, and that stops the current flowing. However that should CLOSE the circuit and actually make the current flow, no?
Attaching some photos..
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