The digital torque wrench for steel bar sleeves is a professional tool that integrates high-precision measurement, intelligent control, and data management. It is specifically designed for the torque tightening and inspection of steel bar sleeve connections in prefabricated buildings and bridge engineering. Its core advantages lie in achieving precise torque control through digital technology and recording data in real time, ensuring that the connection quality complies with the "Reinforcement Mechanical Connection Technical Code" (JGJ 107-2010) standard. The following is a detailed analysis of its core technologies, operation specifications, and selection suggestions:

Core Technologies and Functions

1. High-precision Torque Control

• Bidirectional Reading Accuracy: Mainstream products such as the Shanghai Henggang SGGQ series have an accuracy of ±3%, superior to international standards, covering the torque range of 12-40mm steel bars (80-1000N·m). For example, a 20mm diameter steel bar requires a torque of 280-320N·m, and the wrench alerts when reaching the set value with a sound and light alarm (green LED flashing + buzzer), while the red LED warns of excessive torque.

• Intelligent Calibration: Supports regular verification with a torque calibration instrument (suggested every 3 months), and some models (such as INSIZE IST-W series) have built-in calibration interfaces that can be directly connected to the equipment for precision adjustment.

2. Multi-mode Data Management

• Three working modes: ◦ Tracking Mode: Real-time display of torque changes, suitable for dynamic monitoring; ◦ Peak Mode: Automatically records the maximum torque value, supports storing 500 sets of data and exporting to a computer; ◦ Preset Mode: Sets the target torque value, automatically stops when reached, avoiding over-tightening.

• Data Transmission: Synchronizes data via USB or Bluetooth (such as INSIZE IST-W135A) to Excel and other files, facilitating construction quality traceability.

3. Industrial-grade Durable Design

• Material and Protection: The main body is made of chromium-vanadium steel (CR-V) or alloy structural steel, with chrome plating for rust prevention; some models (such as Norwayway) have an IP54 dustproof and waterproof rating, capable of stable operation in humid and dusty environments.

• User-friendly Operation: Anti-slip handle design (such as INSIZE IST-W series) reduces hand fatigue, and the backlit LCD display remains clear in dim light.