Product Description

187-S Stride Level

Fits Alignment Telescope Barrels

The 187-S was specifically designed for quick, precise leveling of alignment telescopes and collimators. It can also be used to level any cylindrical surface between 1¾” and 3″ in diameter. Like many of our levels, both ends of the bubble are viewed simultaneously by using prisms and a magnification system. This “coincidence” or “split” bubble presentation ensures the most accurate reading of the position of the bubble (see image at right). The bubble is conveniently viewed from any position via the 360-degree rotating turret assembly on top of the unit. The 187-S will indicate off-level conditions as small as one arcsecond. An elastic strap is included to secure the level to the instrument. The coincidence vial is supported by two hardened, ground, inverted “Vs” on a 5″ center.

Have a look at the various other level vials for use on our optical tooling instruments or for general purposes. The 187-S is classified as National Stock Number (NSN) 6650-D50-0065.


Case: Foam-lined plastic case
Approx. weight:
Level, 2 lbs.
Level and case, 3 lbs.
Shipping, 4 lbs.

May Be Used With

271 Tilt Collimator
272-15 Multiple Target Collimator
2022 Alignment Telescope family (includes 20222024, 2024BL, 2030)
2062 Alignment Telescope
C47280 Alignment Telescope
4010 Collimator (discontinued)
Also the following discontinued alignment telescopes: 2023, 81 (all versions), 82, 83 (all versions)