Introduction
The load limiter consists of a sensor, control instrument and connecting cable. The sensor is installed at the wire rope fixed end or pulley shaft of the electric hoist, converting wire rope tension into electrical signals, which are amplified and compared with set values by the control instrument. When the load reaches the pre-alarm value, it gives audible and visual prompts; when reaching the alarm value, it immediately cuts off the hoisting mechanism control circuit while retaining lowering function for unloading. Adopting digital circuit design with configurable parameters via buttons, it features self-diagnosis, fault alarm and load display, widely compatible with various wire rope electric hoists and complying with national crane safety regulations.
Our Advantage
Sensor real-time collects wire rope tension signals with response time ≤0.5s, immediately cutting off hoisting power upon overload, effectively preventing accidents such as wire rope fracture and structural deformation caused by overload operations.
Side-press sensor can be directly clamped onto the wire rope without modifying the hoist structure; pin-type replaces the original pulley shaft directly, with flexible installation methods compatible with 0.5t~100t various electric hoists.
Using high-precision resistance strain sensor and digital processing circuit, overall accuracy reaches ±3% with low temperature drift and strong anti-interference, maintaining stable and accurate performance after long-term use, avoiding false or missed alarms.
Control instrument is equipped with LED digital display of current load; upon overload, red indicator flashes and buzzer alarms, allowing operators to intuitively grasp load status and take timely measures, significantly improving operation safety.
Fully sealed structure with protection grade IP65, dust-proof and moisture-proof, adapting to harsh environments such as workshops and outdoors; no moving wear parts, requiring no maintenance under normal use with service life over 10 years.
Specification
| Parameter | 5~20t | 32~80t | 100~200t | 250~500t |
| Applicable Capacity | 5t / 10t / 16t / 20t | 32t / 50t / 80t | 100t / 160t / 200t | 250t / 320t / 400t / 500t |
| Sensor Type | pin-type | pin-type / plate-ring | plate-ring / pressure type | plate-ring / pressure type |
| Applicable Shaft Dia. | Φ30~Φ60mm | Φ60~Φ100mm | Φ100~Φ150mm | Φ150~Φ200mm |
| Number of Sensors | 1~2 | 2 | 2~4 | 4~8 |
| Overall Accuracy | ±2% | ±2% | ±2% | ±2% |
| Pre-alarm Point | 90% Rated Load | 90% Rated Load | 90% Rated Load | 90% Rated Load |
| Alarm & Cut-off Point | 105%~110% Rated Load | 105%~110% Rated Load | 105%~110% Rated Load | 105%~110% Rated Load |
| Response Time | ≤0.3s | ≤0.3s | ≤0.3s | ≤0.3s |
| Display | LED digital display | Same as left | Same as left | Same as left |
| Contact Capacity | 10A / 250VAC | 10A / 250VAC | 16A / 250VAC | 16A / 250VAC |
| Communication Interface | RS485 / 4-20mA (optional) | Same as left | Same as left | Same as left |
| Power Supply | AC 220V / 380V (optional) | Same as left | Same as left | Same as left |
| Protection Degree | IP65 (Sensor) / IP54 (Meter) | Same as left | Same as left | Same as left |
