I am trying to take over the snowment system for a hotel. I am using a TAC/ Schnieder Electric 7716 control board to do the work. Currently they are using a Tekmar snow melt system. Everything seems to cross over ok except the moisture sensor. They are using a Tekmar 090 snow/ice sensor. This sensor has a 10k ohm slab temp sensor, a 10k heater element temp sensor and a 2,000,000 ohm moisture sensor. The 2 temp sensors work nicely with my controller as I can configure the input to accept a 10k ohm RTD style sensor. However the moisture sensor is making me scratch my head. When it senses moisture it goes from 2,000,000 ohms (dry condition) to a range of 10,000 to 300,000 ohms(wet condition). Any ideas on how I can get this down into a more manageable range? Or should I abandon ship on the moisture sensor and install a separate dry contact style of moisture sensor?