Application range 1: Detect the position, distribution direction, diameter and thickness of the protective layer of steel bars in concrete structure engineering 2: Acceptance of concrete structure construction quality. 3: Assess construction quality 4: Locate rebar locations for drilling, cutting and coring operations. 5: Test the distribution and direction of cables, pipes and metalwork in walls and floors. 6: When evaluating and developing old structures, such as when installing furniture and air conditioning, test the number of steel bars feature: * High resolution LCD screen: 128*128 pixels * Intuitive operation and handheld ergonomic design with good durability * Accurate detection of steel bar position * Helps extend the life of the drill bit and avoid damage while drilling and coring * High-speed, high-precision, high-resolution multi-coil structure design * Built-in high-capacity lithium battery, low power consumption, standby time not less than 20 hours Specifications: * Diameter measurement range (mm): Φ6 - 50 Measuring range (mm) * Position range: 1-120 * First range: 1-60; Second range: 30-120 Thickness measurement accuracy (mm) * Measuring range (mm): 1 - 40, accuracy: ±1 * Measuring range (mm): 41 - 60, accuracy: ±2 * Measuring range (mm): 61 - 80, accuracy: ±3 * Measuring range (mm): 81 - 100, accuracy: ±5 * Measuring range (mm): 101 - 120, accuracy: ±6 Rebar Positioning Accuracy * Measuring range (mm): 1 - 60, accuracy: ±3 * Measuring range (mm): 61 - 120, accuracy: ±6 * Diameter measurement mode: optional * JGJ measurement: optional * Data storage: optional * Closing time: automatic * Power supply: rechargeable lithium battery * Dimensions (mm): 170*78*38; * Weight (kg): 0.28