Can you help me to improve this?

I want to improve this part of a code, I was thinking about using for:

        if((0 < NumberOfSensor) && (NumberOfSensor< 9))MaxPageNumber = 1;
        if((8 < NumberOfSensor) && (NumberOfSensor< 17))MaxPageNumber = 2;
        if((16 < NumberOfSensor) && (NumberOfSensor< 25))MaxPageNumber = 3;
        if((24 < NumberOfSensor) && (NumberOfSensor< 33))MaxPageNumber = 4;
        if((32 < NumberOfSensor) && (NumberOfSensor< 41))MaxPageNumber = 5;
        if((40 < NumberOfSensor) && (NumberOfSensor< 49))MaxPageNumber = 6;
        if((48 < NumberOfSensor) && (NumberOfSensor< 57))MaxPageNumber = 7;
        if((56 < NumberOfSensor) && (NumberOfSensor< 65))MaxPageNumber = 8;