SMC vs 10-32 Coaxial Connector
10-32unf and SMC are not compatible:


on the 10-32unf male = a nut + a central pin 
on the 10-32unf female = a screw + a central hole 
on the smc female (called plug) = a nut + a central hole  
on the smc male (called receptacle) = a screw + a central pin


your sensor : electrical connector is a 10-32unf female