This instrument is based on the industry standards of the People's Republic of China JTJ 058-2000《 In the test procedures for aggregates in highway engineering T 0334-1994《 Designed and manufactured as required by the fine aggregate sand equivalent test. This instrument oscillates the sample through an automatic mechanical vibrator in a transverse linear motion. It is suitable for measuring the content of clay or impurities contained in fine aggregates to evaluate the cleanliness of the aggregates and the sand equivalent of the aggregates. SE express.
This instrument is suitable for asphalt mixture and natural sand, artificial sand and petroleum nitrogen for cement concrete. The maximum particle size of its aggregate shall not exceed 4.75 mm（ Round hole screen 5 mm）。

1. Main technical characteristics
1、This instrument is a dual-tube working mode, which can automatically oscillate parallel and automatically on both samples at the same time, which is convenient to operate, has good oscillation effect and high working efficiency.
2、This instrument is a bench-top structure, the number of oscillations and oscillation time are displayed by the digital tube. After the sample is installed, one cycle of oscillation can be automatically completed.

2. Main technical parameters and indicators