The Thickness Gauge is used to determine if the aggregate particles are to be considered as flaky, i.e. their thickness is less than 0.6 of their nominal size.

The aggregate to be classified is separated into seven sieve fractions from 6.3 to 63 mm, and each fraction is examined separately.

The Length Gauge (Elongation Index BS), is used to measure the elongation index of aggregates.  When the length of the particle is more than 1.8 of the midsize of the sieve fraction, it is considered elongated. The aggregate to be classified is separated into six sieve fractions from 6.3 to 50 mm and each fraction is examined separately.

 Q: Are your company a trading one or a factory?

A: Factory+ trade (integration), More than 10 years focusing on test instruments field.

Q: After an order is placed, when to deliver?

A: Generally about 10-25days, If we have inventory, we can arrange shipment within 3 days Please be aware that our production lead times depend on specific items and item quantities.

Q: What about the warranty with after-sales services?

A: The testing machine is guaranteed for 12 months by gaotiejian, we can help you to repair your problem con troller freely, even it's not from our factory. After the warranty, the professional after-sale service team will provide perfect technical support and help guests solve problems encountered while using our product, handles guest problems and complaints in a professional and timely.

Q: What about the product' services and qualit?

A: Each instruments must be carried out 100% quality examination and test when shipping and delivery goods Product use training, each of our product provide video training to show you how to install operate We can arrange engineer to train the operation of equipment to customer s company when you need. products are widely recognized and trusted by users.