The FA1612-50KN is a compact 50kN compression through hole load cell with a Ø14 mm center bore and a Ø49 × 16 mm body. It fits around bolts, tie rods and shafts to measure compression force in press-fit equipment, clamping systems, automated machinery and test fixtures. Its sensing element is made from 17-4PH stainless steel and is rated IP65 for industrial environments from -40 to 80°C.
This sensor may also be described as a donut load cell, annular load cell, ring load cell, hollow load cell or miniature compression load cell. It provides a rated output of 1.5 mV/V ±20% and must be connected to a compatible strain-gauge amplifier, indicator or data-acquisition module.
Through hole Load Cell Dimensions（Unit:mm）
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Through hole Load Cell Load Direction
Bolt Washer Load Cell Wiring
Through hole Load Cell Specifications
Sensor Physical Parameters
Nominal Capacity
50KN
Deflection at Full Scale
0.1mm
Fundamental resonance frequency (f_G)
＞1000HZ
Safe Overload
120%F.S.
Operating Temperature
-40~80℃
Ingress Protection (IP)
IP65
Cable
φ3x3m
Spring Element Material
17-4PH
Loading Direction
Compression
Sensor Accuracy Parameters
Combined Error
≤±0.5%F.S.
Non-linearity
≤±0.5%F.S.
Hysteresis
≤±0.2%F.S.
Repeatability
≤±0.2%F.S.
Creep(30min)
≤±1%F.S.（30min）
Temperature Effect on Output
≤±0.1%F.S./10℃
Electrical Parameters
Rated Output
1.5±20%mV/V
Zero-point output
±0.03mV/V
Excitation Voltage
1~15V DC
Insulation Resistance
≥5000MΩ/100V(DC)
Through hole Load Cell Installation
For pressure sensors with spherical probes, it is recommended to use finished high-strength steel for supporting tooling, especially for sensors with larger ranges.
Force Sensor Styling Suggestions
Force sensor manufacturing process
01 Incoming Material Inspection
02 Laser Marking
03 Cleaning and Placement
04 Pressure curing
05 Bridge Assembly Welding
06 Test Compensation
07 Adhesive application and curing
08 Laser welding
09 Finished Product Re-testing
10 Cleaning and packaging
Load Cell Force Sensor Non-standard customisation process
Fibos possesses a professional technical team capable of developing customized products to meet specific client requirements. Our R&D cycle is seamlessly integrated with our in-house production lines, enabling us to deliver relevant products within a short timeframe.
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Frequently Asked Questions about Force Sensors
Q1：What is a through hole or donut load cell?
A: A through hole load cell is a strain-gauge force sensor with a central bore. It can fit around a bolt, tie rod or shaft to measure compression in the load path. Donut, annular, ring and washer load cell are common related search terms.
Q2：What is the Ø14 mm center bore used for?
A:It allows a bolt, tie rod or shaft to pass through the sensor so the unit can sit directly in a compression or clamping load path. Verify the required clearance and mounting tolerance before installation.
Q3：Can this load cell connect directly to a PLC?
A: Its native output is 1.5 mV/V ±20%, so a strain-gauge amplifier or transmitter is normally required before connection to a standard PLC analog input.
Q4：Does IP65 allow continuous immersion?
A: No. IP65 indicates dust protection and protection against water jets; it is not an immersion rating. Confirm additional sealing for washdown, immersion, high humidity or corrosive environments.
Q5：Should the sensor be calibrated after installation?
A: Yes. Mating surfaces, preload, eccentricity and structural stiffness can affect the installed result. Calibrate the complete system with traceable force standards after final assembly.
For over a decade, FIBOS has been engaged in manufacturing micro force sensor and load cells. We are proud to support all of our customers, regardless of their size.
Load cell capacity range from 100g to 1000ton Reduction delivery time by 40%.
Precision Force Sensing
— Engineered for Stability, Calibrated for Accuracy.
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