
This product is the original factory-matched height limiter (anti-overwinding switch) for SANY truck cranes, specifically designed for safe crane operations. When the hook rises to the preset height, the device automatically cuts off the hoist’s lifting circuit and triggers an audible-visual alarm, preventing safety accidents such as hook overtravel and wire rope breakage. It is an indispensable safety protection device for lifting operations.
| Parameter | Specification |
| Model | ZN101 / ZN101W |
| Applicable Models | SANY STC25 and other series truck cranes |
| Operating Voltage | DC 24V ±10% |
| Rated Current | 5A |
| Contact Type | Normally Open/Normally Closed Dual Contacts |
| Trigger Method | Wire Rope Pull Type |
| Wire Rope Stroke | 0–500mm (Adjustable) |
| Protection Rating | IP65 |
| Operating Temperature Range | -40℃ ~ +85℃ |
| Housing Material | Reinforced Nylon + Stainless Steel |
| Mounting Method | Flange Mounting |