Lunar regolith water ice pre-detection sensor is an instrument that rapidly predict whether the lunar regolith has water or not through close range observation.In order to test the water content judgment limit of detection

a ground test system is designed and verified.The integrated design of preparation and testing on the platform solves the problem of water content changing due to environmental differences during sample transport.The environmental design

ensure the stability of water content of simulated lunar regolith samples and the reliability for testing results of the sensor.The process design ensures that the weighting method can obtain timely information about the water content of the samples

which solves the problem of inefficient validation of limit of detection due to the information lag.The validation test results show that the change rate of water content of the sample is ensured to be less than 0.2% weight fraction within 2h.Based on the system

it is validated that the limit of detection of the sensor meets the requirements of 0.5% weight fraction with 99.6% confidence probability under the test environment of simulating the low temperature of the lunar surface.The system provides a reference for ground-based validation of sensors for non-contact detection of water-bearing lunar regolith.