IP protection classes

Depending on the application, the protection of the measuring bolt against the ingress of dust and water as well as other media must be taken into account. Various IP protection classes are available for this purpose.

IP64/IP66 – Our standard.
Our force measuring bolts are designed as standard in IP66. The measuring bolt is filled with potting compound to protect the electronics inside from vibration and moisture. The existing openings in the measuring bolt, where the potting compound would be exposed to the environment, are closed with stainless steel covers.
Depending on the application, it is not possible to attach a stainless steel cover for manufacturing reasons (e.g. for very small measuring bolts). In this case, the opening is closed with silicone. The IP protection class drops to IP64.

IP67 – For increased requirements with regard to moisture.
Measuring bolts with protection class IP67 are equipped with locking rings on the stainless steel covers in addition to the protective measures for IP66. These fix the lid in the opening in addition to the adhesive and thus increase the watertightness.

IP68 – For extreme loads caused by dust, water and other media. Attention! Only for stainless steel force measuring bolts!

In order to meet the requirements of protection class IP68, the stainless steel lids can be welded in using a laser welding device. The resulting connection between the measuring bolt body and the lid is waterproof and cannot be removed without causing damage.