Abstract: A grain-bin monitoring system for monitoring relative humidity and temperature is described. The system includes a cable assembly with a support cable and two pairs of communication wires suspended in a grain bin. A plurality of sensor assemblies is coupled along the cable. The sensor assemblies include a housing that protects a sensor device and enables exposure to air within the bin. The sensor device is in electrical communication with a control unit through fasteners for the housing piercing the cable assembly and contacting the communication wires. Electrically conductive, elastomeric pads are disposed between electrical contacts on the sensor device and the fasteners to eliminate galvanic corrosion therebetween. The cable assembly and sensor assemblies are configured to minimize drag forces applied by grain particulate flowing along the cable assemblies. And the sensor assemblies and/or the sensor devices therein are easily replaceable on the cable assembly while in service.

Abstract: A condition sensing system for a grain drying system can include a cable assembly and at least one sensor. The cable assembly can include a support cable and a data-conveying member. The sensor can detect in-grain humidity and/or temperature. The sensor can be coupled to the cable assembly between first and second ends of the assembly. A protective enclosure can enclose the sensor and a respective portion of the cable assembly. Further, in-grain humidity and/or temperature data can be transmitted from the condition sensing system to the grain drying system.

Abstract: A grain drying system includes a master control unit external to the grain storage bin which is preprogrammed with a desirable grain moisture content or EMC. Condition sensor assemblies mounted within the grain bin determine the relative humidity and the temperature of the grain within the grain bin. Also, sensors mounted in the bin's plenum determine temperature, relative humidity and air pressure. A weather station mounted externally of the grain bin determines the outside air temperature and relative humidity. Depending on the conditions determined by the sensor assemblies and the weather station, the master control unit selectively activates the grain bin's drying fan when needed and when it is efficient and effective to do so. A radio or cellular modem allows for communication of the grain's condition. The internal sensor assemblies are preferably secured to flexible cables hung within the grain bin. The cable and rigid rod-like members support the sensors.