A blending device having an interlock system which may comprise a plurality of subassemblies. A thermal detector may be configured to be proximity with matter being blended for human consumption. Interlock system may further include a blade interlock contact and a compressive contact. The blender vessel may be configured to compress the compressive contact to a communicative configuration when connected with the blade assembly. Interlock system may utilize a blender base assembly that has base interlock contacts and a motor. The blade assembly may be configured to releasably mount to the blender base assembly and may cause the base interlock contact and the blade interlock contact to come into electrical communication with each other. The interlock system may ultimately result in the motor being obstructed from operation unless certain conditions are met. The interlock system may further utilize one or more than one logic circuit element.