The instrument operates on the principle that a measured volume of air passes through a compacted powder bed with a specified porosity and thickness, and the resistance to airflow varies according to the characteristics of the powder. By measuring the air permeability, the specific surface area of the material can be determined.

Automatic Cement Blaine Fineness Tester

Model: TD8074-5

I. Product Introduction

The Blaine Air Permeability Apparatus was developed and manufactured by Hebei Tianqixingzi Inspection Equipment Co., Ltd. in accordance with the Chinese industry standard JTG E30-2005, Test Methods of Cement and Cement Concrete for Highway Engineering (T0504-2005, Test Method for Determination of Cement Specific Surface Area by the Blaine Method).The apparatus complies with the relevant requirements of GB 8074-2008, Test Method for Determination of Specific Surface Area of Cement, and was developed with reference to the air-permeability method specified in ASTM C204-75.

It is primarily used to determine the specific surface area of cement and can also be used for various powdered materials, including ceramics, abrasives, metals, coal, food products, explosives, and other fine powders.

II. Technical Specifications

1. Employs a highly reliable microcontroller and integrated circuits, automatically adapting to different temperatures and automatically detecting the instrument's operating status to ensure accurate and reliable measurement results.

2. Automatically detects water level, automatically times the measurement, automatically measures temperature, and automatically calculates and displays the results.

3. Except for manual loading, the entire testing process is completed automatically, avoiding human error.

4. One measurement button press outputs a measurement result; operation is extremely simple.

5. Application Scope: Applicable to the range specified in GB8074-2008.

6. Measurement Accuracy: Relative error, <1%.

7. Temperature: 8–34°C

8. Power Supply: AC 220 V ±10%

9. Inner Diameter of Permeability Cell: Φ12.7 mm

10. Sample Bed Height in Permeability Cell: 15 mm

11. Number of Holes in Perforated Plate: 35 holes

12. Perforated plate aperture: φ1.0mm;

13. Perforated plate thickness: 1mm;

14. Packaging dimensions: 47×26×63cm;

15. Gross weight/Net weight: 5kg;

16. Test data can be printed directly using an external printer.

III. Maintenance and Care

1. Wipe the instrument frequently to keep it clean. Store it in the instrument case when not in use.

2. Maintain the liquid level in the barometer at the specified height.

3. After the test, clean the cylinder and perforated plate and place them in the accessory box for later use.

4. Before the test, check that the electromagnetic pump is operating properly and adjust the negative pressure in advance to prevent liquid from being accidentally drawn into the electromagnetic pump. During the test, if the liquid level fails to rise to the uppermost graduation mark, or rises too quickly and reaches the middle of the glass tube bulb while the pump and valve continue operating, press the “Confirm” key to stop the test immediately. Then open the rear cover of the instrument and adjust the throttle valve with connector to regulate the rate of negative-pressure change.

5. Avoid direct sunlight on the phototube or use in environments with frequent changes in light intensity.

IV. Accessories

1. Accessory Box: 1 pc

2. Sample Spoon: 1 pc

3. Tweezers: 1 pc

4. Brush: 1 pc

5. Rubber Stoppers: 2 pcs

6. Cylinder Base: 1 pc

7. Compaction Rod: 1 pc

8. Perforated Plate: 1 pc

9. Permeability Cell: 1 pc

10. Tamper: 1 pc

11. Φ12.7 mm Filter Paper Discs: 1 bag