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ODR controller needed

I'm looking for an outdoor-reset controller ideally having

- an outdoor air sensor

- an (indoor) immersion sensor

- an 'output' switch

- settings for slope, intersection, and hysteresis

Given specs, I can roll my own sensors, so an immersion sensor is not a strict requirement. The controller has two applications: initially as an ODR boiler control for a nonmodulating boiler firing to solar storage; later as a mode control, selecting between heating from solar storage v from a modulating boiler.

If there are such products, what is your favorite?
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