CMS Bolt Load Cell

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CMS Bolt Load Cell

Bolt Load Measurment

CMS Bolt Load Cell

The BoltSafe bolt load cell is a specialized sensor designed to monitor actual bolt load in bolted joints. With the Continuous Monitoring System (CMS), multiple load sensors can be networked to track bolt load in real-time from a single connection point. By eliminating uncertainties about bolt load, BoltSafe enhances safety, ensures more reliable joints, and provides better structural control. Additionally, it helps reduce installation and maintenance costs throughout the joint's lifespan.
Features
Overview of the BoltSafe CMS Bolt Load Cell

The BoltSafe CMS (Continuous Monitoring System) bolt load cell is a specialized load sensor designed for accurate monitoring of bolt loads in bolted joints. This system enables real-time tracking from a single connection point and supports networking of multiple sensors for large-scale monitoring. By providing precise, continuous insights into bolt load behavior, the CMS system enhances reliability, safety, and control while significantly reducing installation and long-term maintenance costs.

Advanced ASIC Technology for Precision Monitoring

Each BoltSafe load sensor is equipped with an advanced ASIC (Application-Specific Integrated Circuit) that handles signal processing and digital communication. Every sensor includes a unique serial number for secure traceability. In addition to bolt load measurement, the CMS system can also monitor sensor temperature, providing a complete data profile for operational conditions.

BoltSafe load cells are available in two steel variants—standard stainless steel and a high-strength version capable of handling up to 15% more load while maintaining a compact, space-efficient footprint.

Applications in Structural Health Monitoring and Temporary Construction

BoltSafe load cells play an important role in temporary constructions and structural health monitoring. When installed like a washer under a nut (typically on the non-driven side of a connection), the load cell senses structural deformation caused by applied force. These deformations cause changes in electrical resistance, enabling real-time load measurement.

Available in sizes ranging from M12 to M72 and 7/8” to 2-3/4”, the load cell is designed to withstand harsh environments including oil, seawater, extreme weather, and temperatures between -40°C and 80°C. Each BoltSafe CMS load cell is pre-calibrated in the factory and requires no additional calibration when used within specified conditions.

Advantages of Continuous Monitoring

Continuous monitoring using the CMS load cell gives users direct insight into bolt load conditions while the cell is in active operation. Beyond real-time visibility, the CMS system also stores historical data, making it easier to identify when a load deviation occurred and what triggered it.

When networked, CMS sensors provide large-scale monitoring capability, allowing data from numerous sensors to be aggregated, analyzed, and managed remotely.

Readout Options for the CMS Bolt Load Cell
  • Handheld Reader: A simple, cable-connected portable device for quick, on-site bolt load readings.
  • Network with PDI and PDI-NT: The CM-1000 box with PDI connects multiple sensors to a Windows PC for advanced monitoring. The PDI-NT standalone display operates without a PC. Both systems support up to 256 interconnected CMS sensors.
  • RS-232 and Analog Converter: Ideal for monitoring single sensors. Includes analog output and a relay function for programmable load threshold alarms.
  • IoT-Node for Remote Monitoring: Uses LoRaWAN technology to transmit data securely to the cloud, enabling remote access from any internet-connected device. Each load cell requires its own IoT-node for connectivity.

These versatile readout options make the BoltSafe CMS load cell an efficient, scalable, and future-ready solution for continuous bolt load monitoring across diverse industrial applications.

Technical Data

BoltSafe CMS Bolt Load Cell — Technical Specifications
Bolt Size Clearance Hole ID Outside Diameter OD Overall Thickness T Steel Weight Max. Load Measuring Surface IM Measuring Surface OM
mm inch mm inch mm inch gr oz kN lbf mm inch mm inch
M20 20,4 0.8 37,0 1.46 14 0.55 73 2.58 166 37318 22,0 0.87 27,7 1.09
M22 22,4 0.88 40,0 1.57 14 0.55 85 3 208 46760 24,2 0.95 31,4 1.24
M24 24,4 0.96 44,0 1.73 14 0.55 104 3.67 239 53729 26,4 1.04 33,3 1.31
M27 27,4 1.08 50,0 1.97 14 0.55 137 4.83 315 70815 29,7 1.17 38,0 1.5
M30 30,6 1.2 56,0 2.2 17 0.67 214 7.55 385 86551 33,0 1.3 42,8 1.69
M33 33,6 1.32 58,0 2.28 17 0.67 218 7.69 480 107908 36,3 1.43 46,6 1.83
M36 36,6 1.44 66,0 2.6 17 0.67 295 10.41 560 125893 39,6 1.56 51,1 2.01
M39 39,6 1.56 68,0 2.68 17 0.67 300 10.58 670 150622 42,9 1.69 55,9 2.2
M42 42,6 1.68 75,0 2.95 20 0.79 445 15.7 772 173553 46,2 1.82 60,0 2.36
M45 45,6 1.8 80,0 3.15 20 0.79 506 17.85 905 203452 49,5 1.95 64,7 2.55
M48 48,6 1.91 86,0 3.39 20 0.79 591 20.85 1018 228856 52,8 2.08 69,5 2.74
M52 52,6 2.07 92,0 3.62 20 0.79 669 23.6 1221 274492 57,2 2.25 74,2 2.92
M56 56,6 2.23 100,0 3.94 20 0.79 798 28.15 1408 316531 61,6 2.43 78,7 3.1
M60 60,8 2.39 108,0 4.25 23 0.91 1083 38.2 1647 370260 66,0 2.6 83,4 3.28
M64 64,8 2.55 114,0 4.49 23 0.91 1196 42.19 1794 403307 70,4 2.77 88,2 3.47
M64HV 68,4 2.69 120,0 4.72 23 0.91 1310 46.21 2100 472099 73,5 2.89 93,0 3.66
M72 72,8 2.87 124,0 4.88 23 0.91 1360 47.97 2250 505820 79,2 3.12 104,0 4.09
M72(HV) 72,8 2.87 124,0 4.88 23 0.91 1370 48.32 2500 562022 78,4 3.09 110,0 4.33

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Frequently Asked Questions

You will find answers to about our various industries and industry specialists service and more. Please feel
free to contact us if you don't get your question's answer in below.

Weighing systems- In scales for industrial or commercial use. Force measurement- In testing machines to measure force applied during testing. Load monitoring- In cranes, hoists, or any system that lifts or supports weight.

Load cells themselves are not typically sized by bolts but can be integrated into systems that measure forces on bolts of various sizes, like in torque measurement or structural testing setups. The bolt size for a load cell would depend on the application and load capacity required.

Weighing systems- In industrial scales for inventory and production monitoring. Force measurement- In testing equipment, such as material testing machines and machinery load testing. Load monitoring- In cranes, hoists, and other lifting equipment to measure load or weight. Automation- In robotic systems and conveyors to monitor the weight of materials being handled.

A load cell is used to measure force or weight by converting mechanical energy into an electrical signal that can be processed and analyzed.

Load cells are applicable in industries like manufacturing, construction, aerospace, automotive, logistics, healthcare, and research, for applications that require force, weight, or load measurement.
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