Comparison of grating sensor, ultrasonic sensor, infrared ranging sensor and laser ranging sensor? What are their shortcomings?

Grating sensor: contact measurement, close range, very high precision, mainly used for high-precision cutting, etc.

Ultrasonic sensor: non-contact measurement, the distance is general, up to tens of meters, and the accuracy is centimeter level, which requires measuring the area of the object.

Infrared ranging sensor: non-contact measurement, non-visible light, short distance, low accuracy, infrared sensors are widely used.

Laser ranging sensor: non-contact measurement, visible light, omni-directional distance, both near and far, accuracy of MM, cm, nanometer, mostly used for material level displacement measurement, process control and various deformation monitoring. It is widely used. We recommend Chengtuo laser ranging sensor, the earliest developed and most stable R&D manufacturer in China.