Hi !
I come here because I have no one around me that can help.
I have a simple project : I want to process my color film at home (C-41 process). With C-41 you need to control with precision the temperature of the chimicals. I need an accuracy of 0,5°C to 1°C, according to the brand of the chimicals used.
My device will be rather simple : an aquarium pump to keep the water evenly at the same temperature throughout the bath; a water heater (like the ones foud in coffee machines; 110V) and one of those devices: ST-1000 (accuracy: +/- 1°C) / MH1210W (accuracy: +/- 0,3°C) / PID thermostat.
So I have a few questions :
1. can I rely on the technical sheet of those instruments? If so, the MH1210W would be my choice (accuracy: +/- 0,3°C). If not, what other (simple) temperature controling device could I use?
2. "where" is the precision of those instruments? In their calibration? Or in the precision of the sensor? If its in the sensor, which brand of sensor should I use?
3. what is a "PID thermostat" and should I use it in lieu of the STC?
4. Now, if there was somewhere a super simple and easy tutorial for making the equivalent with a Raspberry PI I would consider this path since I would learn something (but it has to be super super simple!).
Thanks!
Rémi
I come here because I have no one around me that can help.
I have a simple project : I want to process my color film at home (C-41 process). With C-41 you need to control with precision the temperature of the chimicals. I need an accuracy of 0,5°C to 1°C, according to the brand of the chimicals used.
My device will be rather simple : an aquarium pump to keep the water evenly at the same temperature throughout the bath; a water heater (like the ones foud in coffee machines; 110V) and one of those devices: ST-1000 (accuracy: +/- 1°C) / MH1210W (accuracy: +/- 0,3°C) / PID thermostat.
So I have a few questions :
1. can I rely on the technical sheet of those instruments? If so, the MH1210W would be my choice (accuracy: +/- 0,3°C). If not, what other (simple) temperature controling device could I use?
2. "where" is the precision of those instruments? In their calibration? Or in the precision of the sensor? If its in the sensor, which brand of sensor should I use?
3. what is a "PID thermostat" and should I use it in lieu of the STC?
4. Now, if there was somewhere a super simple and easy tutorial for making the equivalent with a Raspberry PI I would consider this path since I would learn something (but it has to be super super simple!).
Thanks!
Rémi