This panel mount digital thermometer works between -40 and 300 Degrees F. It has a 10 ft Cable lead and the probe is full submersible. This would work for monitoring: mash tun temps, HLT temps, boil kettle temp, fermentation chamber and kegerator. Check out the full specs - Here
I have this thermometer and it has worked really well for me. You can see it in these two posts Hands on Double Wall Stainless Growler and Hands On Rubbermaid Commercial FGR80DC Stainless Thermometer.
Taylor Digital Panel Mount Thermometer, -40 to 300 Degree F
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