A crane scale is a weighing tool used to measure the weight of heavy objects in industries such as construction, manufacturing, and shipping. These scales are attached to a crane or hoist, which allows for suspended objects to be weighed while they are in the air. There are several types of crane scales, each with its own capacities and features:

1. Mechanical Crane Scales: These scales utilize a mechanical lever system to determine the weight and have the ability to weigh objects between 1-10 tons.
2. Digital Crane Scales: These scales use electronic sensors to calculate weight and display the results on a digital screen. Their weight capacity can range up to 100 tons.
3. Wireless Crane Scales: These scales have the advantage of transmitting weight data wirelessly to a separate remote display, allowing for easy monitoring and recording of weight. They can weigh objects up to 100 tons.
4. Portable Crane Scales: Portable crane scales are designed for use in remote locations or for easy transportation between sites. They have a capacity range of up to 5 tons.
5. Explosion-Proof Crane Scales: These scales are built for use in hazardous environments, such as areas with explosive gases or dust, and are certified for safe use. Their weight capacity can reach up to 50 tons.

In summary, crane scales play a critical role in various industries that handle heavy objects. The various types of crane scales offer a range of capacities and features to meet the specific needs of different industries and applications. When choosing a crane scale, it's important to consider its weight capacity and features to ensure it meets your specific requirements.