You can do this without a voltage divider as well, either by using a Zener, an LED across the input with a resistor in series with the sensor, or place a Schottky diode from the input to the 3.3 V rail.
Here are examples:

^{simulate this circuit – Schematic created using CircuitLab}

You can do this without a voltage divider as well, either by using a Zener, an LED across the input with a resistor in series with the sensor, or place a Schottky diode from the input to the 3.3 V rail.
Here are examples:

^{simulate this circuit – Schematic created using CircuitLab}

P.S.: It is not clear what type of output is on your sensor. If it's an NPN open collector, you could simply use a pull-up resistor to the 3.3V rail, as others have indicated in their answers.

You can do this without a voltage divider as well, either by using a zener, an LED across the input with a resistor in series with the sensor, or place a Schottky diode from the input to the 3.3V rail.
Here are examples:

^{simulate this circuit – Schematic created using CircuitLab}

You can do this without a voltage divider as well, either by using a Zener, an LED across the input with a resistor in series with the sensor, or place a Schottky diode from the input to the 3.3 V rail.
Here are examples:

^{simulate this circuit – Schematic created using CircuitLab}