The VL53L4CD sensor is specifically designed for proximity and short-range measurements. It provides very accurate distance measurements from only 1 mm up to 1200 mm. This new generation laser emitter has an 18° FoV. It improves performance under ambient light with a ranging speed up to 100 Hz. The VL53L4CD device features ULP mode for continuous FoV monitoring. It has a minimal power consumption, down to 55 μA (see the AN5870), which is optimized for battery-powered devices. The sensor processes data on-chip, without sending raw data to the host. It sends an interrupt to the host when a target is detected. Such integrated on-chip processing reduces design complexity and the BOM (bill of material) cost. These features enable the use of less powerful, more cost-effective microcontrollers. The FlightSense technology, along with the principles of the VL53L4CD, inspired liquid level monitoring (STSW-IMG039) example codes. This cutting-edge solution from STMicroelectronics enables the use of a nonmechanical sensor for measuring liquid levels. This in turn reduces the risks associated with corrosion and rust. The solution delivers precise measurements across a wide range of liquids, from water to fuel. Like all Time-of-Flight (ToF) sensors based on ST's FlightSense technology, the VL53L4CD records an absolute distance measurement regardless of the target color and reflectance. The VL53L4CD is housed in a miniature reflowable package, which integrates a SPAD (single photon avalanche diode) array. It achieves the best ranging performance in various ambient lighting conditions and for a wide range of cover glass materials. All of ST's ToF sensors integrate a VCSEL (vertical-cavity surface-emitting laser) which emits fully invisible 940 nm IR light. This light has a Class 1 certification and is totally safe for the eyes.