Chat with us, powered by LiveChat
arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustic application See All Software See All Transducers See All Vibration Testing Equipment See All Electroacousticsb - OLD unpublished See All Academy See All Resource Center See All Services See All Support See All Applications See All Industries See All Our Business
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Transmission Gearboxes See All Turbo Charger See All DAQ systems See All High precision and calibration systems See All Industrial electronics See All Power Analyser See All S&V Handheld devices See All S&V Signal conditioner See All Accessories for electroacoustic application See All DAQ See All Drivers API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Acoustic See All Current / voltage See All Displacement See All Load cells See All Pressure See All Strain Gauges See All Torque See All Vibration See All Temperature See All LDS Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Accessories for modal exciters See All Test Solutions See All Training Courses See All Primers and Handbooks See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Acoustics See All Asset & Process Monitoring See All Electric Power See All NVH See All OEM Custom Sensors See All Structural Integrity See All Vibration See All Automotive & Ground Transportation See All Business Ethics
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Fusion-LN See All Accessories for industrial electronics See All Handheld Software See All Accessories for S&V handheld devices See All BK Connect / PULSE See All API See All Microphone sets See All Microphone Cartridges See All Acoustic calibrators See All Special microphones See All Microphone Pre-amplifiers See All Sound Sources See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories for strain gauges See All Non-rotating (calibration) See All Rotating See All CCLD (IEPE) accelerometer See All Charge accelerometer See All Impulse hammers / impedance heads See All Cables See All Accessories See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All Resources See All Electroacoustics See All Environmental Noise See All Noise Source Identification See All Product Noise See All Sound Power and Sound Pressure See All Vehicle Pass-by Noise See All Production Testing and Quality Assurance See All Machine Analysis and Diagnostics See All Structural Health Monitoring See All High Voltage See All OEM Sensors for the Agriculture Industry See All OEM Sensors for Robotics and Torque Applications See All Structural Dynamics See All Material Properties Testing

Cylindrical Gauges (LB11/TB21)

Owing to their convenient size and cylindrical shape, the LB11 and TB21 strain gauges are ideally suitable for measurements in screws and bolts.

img

Cylindrical Gauges (LB11/TB21)

expand_more
chevron_left
chevron_right

LB11 & TB21: Strain Gauges for Measurements in Screws and Bolts

Bolts are a common construction element used to connect various components. The LB11 and TB21 series of cylindric strain gauges with lead wires, have especially been designed to measure strain, force, and vibration in bolts, screws, and other axial construction elements. 

They have been equipped with copper leads and can be used directly in pre-drilled bolt elements. For this, a 2 mm drilling in the structure is required. Both, LB11 and TB21, come as a tubular strain gauge that can be used in a temperature range of –200°C to +140°C.

  • The LB11 has a linear measuring grid in the strain direction. It is suitable for quarter-bridge applications and has a resistance of 120 Ω.                                     
  • The TB21 has two measuring grids arranged at 90° and is connected as a half-bridge. This allows for an improved temperature compensation at varying temperatures. The temperature compensation at +-5 °K temperature change causes a drift in the range of 0 to 80 µm/m, depending on the screw and the installation. This is due to the geometry of the application and differs significantly from installations on planar objects. The resistance of the strain gauge is 1000 Ω (+/- 1%).  

Compact

  • Used for nominal drillings of 2 mm
  • Cylinder height: 11.5 mm
  • Measuring grid: 3 mm

Facilitates strain, force, and vibration measurements in the most confined spaces.

Resistant

  • Comes with temperature response compensation for steel
  • Resistance: 120 Ω (LB11) / 1000 Ω (TB21)

Ideally matched to the needs of the measurement application.

Immediately available

  • Available, in stock
  • Equipped with 60 mm copper leads

Save your time and try it right away!

Filter

close
LB11 - Data Sheet Data Sheets English
TB21 - Data Sheet Data Sheets English

Certificates and Approvals

Strain Gauges and Accessories - Statement of Compliance Declaration of Conformity English
Cylindrical Gauges (LB11/TB21)
Type/technology Foil strain gauge
Application Stress Analysis / structural testing
Geometry Linear, T rosette
Measuring grid length 3 mm
Measuring grid length 0.118 in
Measuring grid width 5 mm
Measuring grid width 0.197 in
Carrier length 11.5 mm
Carrier length 0.453 in
Carrier width 6 mm, 1.9 mm
Carrier width 0.236 in
Temperature range Limited temperature range
Nominal resistance 120 Ohms, 1000 Ohms
Gauge factor (measuring grid material) Constantan (ca 2.0)
Temperature response Ferritic steel (10.8 ppm/K; 6.0 ppm/°F)
Maximum elongation Standard
Fatigue life Standard
Connection configuration Leads, Enamelled copper wires
Mounting Embedded
Grid protection Open face

List of accessories available for all variants of this family

Product Code Description
Hot curing 2-comp. adhesive EP70 1-EP70 Hot curing 2-comp. adhesive EP70
Cleaning kit RMS1 1-RMS1 Cleaning kit RMS1
Measurement cable by the meter K-KAB-ML Measurement cable by the meter