|1||Without vent hole|
|2||With vent drilling|
Level markings and special lengths GN 109 for oil dipsticks are available for the standards shown above. The dipstick is shortened to the length l1 and the marking notches are milled in at l2 or l3 with the effect that they are easily visible. The maximum length l1 is given in the appropriate standard. The length specifications l1 to l3 refer to the contact surface without seal, with a tolerance of ±1 mm to be taken into account. For critical applications and depending on standard, the seal must be taken into consideration with a thickness of as much as 2 mm.
The level markings / special lengths GN 109 are to be ordered as a separate item in shopping cart step 1 under note.