
GY31 concrete reinforcement detector is mainly used for detecting the position, distribution and direction of reinforcement, thickness of protective layer, and diameter of reinforcement in concrete structure engineering; Construction quality acceptance and testing of concrete structures in buildings; Inspection and testing of steel bars in structures such as bridges and tunnels; Evaluate the safety and performance stability of the under construction structure; Testing the amount of reinforcement during the evaluation and renovation of existing structures; Detecting the orientation and distribution of ferromagnetic and conductive materials in non-magnetic media
Compliant with the standard
GB 50010-2010 "Code for Design of Concrete Structures" (2015 edition)
GB 50204-2015 "Code for Acceptance of Construction Quality of Concrete Structures"
GB/T 50344-2019 "Technical Standard for Testing of Building Structures"
JGJ/T 152-2019 "Technical Specification for Testing of Steel Reinforcement in Concrete"
DB11/T 365-2016 "Technical Specification for Thickness and Diameter of Steel Reinforcement Cover"
GB/T 50784-2013 "Technical Standard for On site Testing of Concrete Structures"
JJF 1224-2009 "Measurement of Thickness of Steel Reinforcement Cover and Floor slabs"
Instrument Calibration Specification "JTG/T J21-2011" Regulations for Testing and Evaluating the Bearing Capacity of Highway Bridges "
Product Features
Real time display of protective layer thickness and spacing data on the same screen, and automatic data storage
The sensor adopts an incoming encoder, smooth four-wheel drive, and a bar shaped light guide column to timely locate the steel bars, with high accuracy in on-site detection Dense reinforcement anti-interference algorithm improves resolution accuracy and ensures consistent and stable data Built in Bluetooth chip, connected to mobile app to achieve real-time data upload on site Compact size, 5-inch high-definition full-color LCD screen, 32-bit CPU processor, smoother core computing speed, and more efficient detection and use Plug in high-capacity lithium battery with low-power design, capable of continuous use for over 21 hours after fully charged Support JGJ detection function and meet the requirements of detection standards Support remote instrument software upgrade, enjoy convenient service support, PC driver self adaptation, no driver installation required Data processing software that easily generates detection reportsReinforcement diameter setting range
∅ 6mm~∅ 50mm
Large range
One range 1-105mm
Two ranges 5-205mm
Large allowable error in protective layer thickness
± 1 (mm) 1-80mm
± 2 (mm) 81-120mm
± 4 (mm) 121-205mm
Applicable range of diameter estimation ∅ 6mm~∅ 50mm
Large error in diameter estimation ± 1 specification
Profile mode/grid mode √
Scanning range: excellent after-sales service
Storage quantity: 2 million measuring points
Data correction function (spacing/thickness) √
Data transmission interface U, etc.
Power supply method: rechargeable lithium battery

