(Figure 1: Building of China Academy of Building Research)

SR-4500A seedless densitometer is an instrument used to measure the wet density, moisture content, and compaction degree of roads and foundation soils. Also known as a soil non nuclear density meter, it can replace a nuclear soil density meter. It is the result of years of research by researchers from the China Academy of Building Research, integrating the latest soil research theories and calculation methods at home and abroad. The Beijing utility model patent and Beijing exterior design patent have established reliable and accurate mathematical equations for measuring soil. Selected by Beijing Sichuanger Building Testing Technology Development Co., Ltd. as the most advanced contemporary technologyA/DThe company's chip technology production exceeds all existing domestic and foreign products of the same type in the market. Accurate measurement of soil characteristics can be carried out.SR-4500The nuclear free density meter is a device with independent intellectual property rights（EDG）Advanced instruments both domestically and internationally.

(Full picture of SR-4500 host in Figure 2)

SR-4500It is a green and environmentally friendly instrument. Display on a large color LCD screen；Six high reliability performance keyboards complete human-machine dialogue; The main screen of the instrument displays six menus in both Chinese and English, and the six major functions can be directly switched and operated on a single screen. The software interface is concise and easy for operators to quickly grasp.

SR-4500Fast testing without the need to measure waiting time. It adopts the latest modern chip technology, which is one generation more advanced than the current product technology application in the market.

SR-4500Accurate testingThe latest research results of the applicationIt is an accurate mathematical and physical equationThe product is a combination of advanced soil sensor technology, soil physics laboratory testing, soil properties and laws, and modern electronic analysis and measurement technology.

(Figure 3 SR-4500 complete set of instrument components diagram)

SR-4500Soil seedless density meter(EDG)It is an alternative nuclear density meter that measures the compaction degree of roadbeds and foundations、wet density、Electronic measuring instruments for moisture content can also be used for dam construction、Fill soil foundation、Underground engineering foundation、Soil measurement for a series of construction sites, including backfilling with garbage and soil.

SR-4500Soil seedless density meter(EDG)correctEstablish a soil model on site and select corresponding testing points. Take soil samples from each corresponding testing point for laboratory physical method testing (such as sand filling method, compaction experiment, etc.) and input them into the instrument; At the same time, the soil sensor of the SR-4500 nuclear free soil density meter is used for electronic measurement at the same testing point. After the electronic information at the same testing point corresponds one-to-one with the physical information in the laboratory, the mathematical and physical curve equation of the soil to be tested is established. through the use ofSR-4500Testing with electronic instruments can improve efficiency by over 90%.

SR-4500Soil seedless density meter(EDG)Measurement accuracy: higher than3%Measurement range: Meet all soil measurement requirements for the standard compaction degree at the construction site; Usage environment: Temperature0 ℃~50 ℃, humidity: 3%~90%.

SR-4500Soil seedless density meter(EDG)Powered by lithium batteries, charger uses AC110V～220VRange, fully charged for use16Hour; Host size:330240180; Host weight:3Kg.

(Figure 4 SR-4500 Laboratory Physical Calibration Diagram)

SR-4500Soil seedless density meter(EDG)Strict testing and inspection are conducted before leaving the factory at the Chinese Academy of Building Sciences, and laboratory testing reports are included with the instruments. Users can also use any physical testing method to establish soil models, such as sand filling method、cutting ring method、Moisture content test electric drying method; Test the accuracy of testing instruments to avoid confusion between the current domestic and foreign instruments of this type. Using the laboratory testing method shown in the figure, make three or more soil standard samples with different moisture contents (same compaction degree), such as5％、10％、15%The moisture content can also be adjusted using the sand filling method at any time、cutting ring method、Moisture content test using electric drying method to grasp the wet density or moisture content of actual soil standard samples. Establish the soil model according to the instrument usage method, and then conduct retesting to check the accuracy of the instrument's measurementThe scope of measurement andAccuracy.

SR-4500Soil seedless density meter(EDG)Electronic standard instruments are also used for a series of inspections in the testing projects conducted by the Chinese Academy of Building Sciences before leaving the factory. The instrument list also provides a calibrator for users to keep track of the instrument situation at any time, and there is a fine adjustment knob on the soil electronic sensor for calibration and adjustment.

The quality of engineering construction should be strictly controlled and a rigorous scientific attitude should be maintained.