Founded in 1960 , S. Himmelstein and Company is committed to innovation and manufacturing world-leading torque sensors and related digital display equipment. S. Himmelstein offers standard products ranging from 0.07 Nm to 452,000 Nm , with non-standard sizes up to 2.5 Nm . Product accuracy reaches up to 0.02% , and mechanical overload capacity is up to 1000% (rated range), covering all testing applications worldwide. All sensors come with an NVLAP calibration certificate.
Process and quality control
Himmstein Corporation of the United States has its own machining centers, surface treatment and heat treatment processes, and can provide ISO 17025 certified torque calibration services. All its products are designed, manufactured and tested in the United States, and its advanced machine shops and testing and engineering facilities allow for complete control over the manufacturing process, ensuring the quality of every product.
Sensor manufacturing process
• Sensor body production – The factory independently completes steel cutting and metal processing.
• Quality – Quality monitoring in terms of external dimensions
• Wheatstone Electric Bridge – Adhesive Bridge Road
• Wire bonding – Complete the strain gauge bridge wiring
• Temperature compensation – Perform temperature compensation treatment on the elastic shaft
Assembly – Component assembly
• Actual speed operation test – Run at rated speed for 30 minutes
• Temperature compensation – Perform final temperature compensation on the assembled torque sensor.
• NAVLAP calibration – 10 -point load /10- point unload
Unique structure
The unique wireless signal transmission technology of the American company Himinstein has revolutionized the traditional ring-shaped closed receiver design of bearingless torque sensors. Its sensor base uses an open arc-shaped design (nearly a quarter arc).
The radial clearance between the receiver and the flange antenna can reach 5~7mm , and the axial tolerance can reach ± 10mm . This greatly improves the convenience and safety of the sensor during installation and use, and reduces subsequent maintenance costs.
External loads
The American-made Himmstein torque sensor is designed based on the concept of meeting infinite life fatigue testing requirements and has robust and reliable mechanical properties.
Axial, radial, and deflection loads (less than the rated value) can occur simultaneously without damaging the sensor itself.
The robust mechanical structure of the American-made Himinstein torque sensor makes it more suitable for harsh environments. It also boasts a longer service life compared to other similar products.
Mechanical overload
High-precision torque measurement with fast response is essential for testing motor efficiency, characterizing motor performance, and developing performance curves.
The same applies to diesel engines. However, during diesel engine testing, a sudden increase in torque can easily occur, causing sensor overload. Generally, to ensure the smooth progress of the experiment, manufacturers choose a larger range torque sensor to prevent damage from overload. However, this unfortunate choice significantly reduces the accuracy of the test data.
Generally, the measuring device should be avoided from operating within 1/3 of its range, as this will increase the absolute error. Using a sensor with a larger range will cause the measured value to be close to 1/3 of its range .
Himmstein torque sensors from the United States offer standard products with a mechanical overload capacity of 200%, with some models boasting 400% or even 1000% . These ultra-high overload capacity torque sensors ensure both the accuracy of experimental data and meet the overload requirements of certain specialized experiments.
