Gun Bore Inspection by Caliber: 25 mm to 155 mm and Larger
Zistos GBIS covers gun bores in two classes. The Medium system fits 25, 30 and 40 mm+ tubes with up to 10 ft (3 m) reach. The Large system fits 57 to 155 mm and larger, including 203 mm, with about 34 ft (10.3 m) reach.
Direct answer
Zistos GBIS covers gun bores in two classes. The Medium system fits 25, 30 and 40 mm+ tubes with up to 10 ft (3 m) reach. The Large system fits 57 to 155 mm and larger, including 203 mm, with about 34 ft (10.3 m) reach.
One inspection workflow covers two bore classes. Centering rings, adapters and gauge blocks fit each caliber.
Caliber matrix
System | Calibers (mm) | Reach
GBIS Medium | 25, 30, 40+ | Up to 10 ft (3 m)
GBIS Large | 57, 60, 76, 81, 84, 85, 90, 95, 100, 105, 120, 125, 130, 155, 203 | About 34 ft (10.3 m)
Medium system: chain gun and medium caliber tubes
Dual wide-angle forward and narrow-angle side cameras, up to 8 MP, with white LED illumination. An optional UV light at 365 nm supports magnetic particle inspection. A slip ring lets the camera turn without twisting the cable.
Large system: mortar, tank and cannon tubes
A magnified side camera of up to 16 MP, two interchangeable telescoping poles and an optional Bore Measurement Kit. An optional laser rangefinder reports depth automatically. PA-NATO and CR123A power adapters are available.
Other sizes
Consult Zistos for calibers not listed. See the Military market page and the Zistos GBIS page.
Frequently asked questions
Which calibers does GBIS Medium cover?
Centering rings fit 25, 30 and 40 mm+ tubes. Consult Zistos for other sizes.
Which calibers does GBIS Large cover?
Adapters and gauge blocks fit 57, 60, 76, 81, 84, 85, 90, 95, 100, 105, 120, 125, 130, 155 and 203 mm.
How far can GBIS reach into a tube?
Up to 10 ft (3 m) on Medium and about 34 ft (10.3 m) on Large.