Company Profile:

Shanghai Fangrui Instrument Co., Ltd. is a professional manufacturer of measuring instruments, with production licenses for electronic scales and drying moisture meters. The various instruments produced have completely independent intellectual property rights, ensuring long-term safe use for users.

The company has a complete R&D, production, quality inspection, after-sales and other systems to ensure that every product produced meets the corresponding national and industry standards, and can provide technical inspection reports from Shanghai Institute of Metrology and Testing.

The instrument, based on the classical Archimedes principle, uses a force sensor based on the principle of electromagnetic force balance that is highly sensitive, accurate, and repeatable. It can automatically, conveniently, accurately, and quickly test the specific gravity of solids and the density of liquids. By utilizing the weighing function of this instrument, it can also replace electronic analytical balances with corresponding accuracy and range.

It is widely used to test the density of rubber, plastic (particles or finished products), wires and cables, electronic components, ferrite materials, metals, powder metallurgy, glass and other solid, colloidal, paste and other semi-solid, powder and various liquids (aqueous solutions, oils, essence, spices, coatings, cosmetics, etc.).

The ZMD series automatic electronic density meter/specific gravity meter is designed specifically for testing the density or specific gravity of objects. Compared with density scales on the market that add a density measurement device to the electronic balance, it has the following obvious advantages:

① A regular density balance, the liquid used to test solid density, and the sample used to test liquid density are all placed on the scale pan of an electronic balance. If these liquids spill over, they will flow into the sensor under the scale pan, which can be repaired or scrapped. And our automatic electronic density meter is specially designed for measuring density. The sensor is placed on top of the scale pan, and even if the liquid is completely spilled, it has no effect on the sensor. In addition, the operating space is large and testing is very convenient.

② The use of large water tank glass cups effectively reduces the error caused by the rise of liquid on the suspension bar and improves the accuracy of testing The built-in standard program uses pure ethanol as a medium for measuring solid density, which is very useful for measuring solids with densities less than 1 and greater than 0.8, especially plastic particles. A regular density balance can only use water as a standard medium and is powerless for samples with a density less than 1. In addition, samples such as plastic particles can produce bubbles when placed in water, which can affect measurement accuracy, but placing them in ethanol can effectively eliminate bubbles. So, precisely because of this special feature, our density meter has a lot of users in industries such as rubber and plastic.

④ Our electronic automatic density meter adopts an advanced measuring device based on the electromagnetic force balance principle of high-precision electronic scales. Compared with the simple measuring device based on the strain gauge principle of commonly used low precision electronic scales on the market, it has the characteristics of high precision, high accuracy, high repeatability, easy operation, safety and durability, or absolute advantages.

The main features of the instrument are:
1. The principle of electromagnetic force balance, with high sensitivity, high precision, and high repeatability; 2. Simple operation, large space, sturdy structure, convenient and durable; 3. Multi functional: capable of measuring the specific gravity of liquids, the density of solids, semi solids, powders, and the mass of objects; When testing solid density, the instrument will automatically calculate the final result without the need for manual conversion;

5. There are multiple options for standard components for liquid density testing, which can meet the testing requirements for liquids with certain viscosity or corrosiveness;
6. The shape of the tested solid sample can be solid block, granular, thin film, etc;

There are multiple options for liquid density testing standard components, which can meet the testing needs of liquids with certain viscosity and corrosive liquids.

8. STN wide viewing angle backlit LCD display;
9. Automatic zero position tracking; 10. Dynamic temperature compensation; 9. Automatic range calibration; 11. Full range tare removal; 12. Automatic fault diagnosis; 13. Overload alarm; 14. Overload protection; 15. RS232 interface output

The instrument fully complies with the following standards:
1. GB/T 611-2006 General Method for Density Determination of Chemical Reagents 2 GB/T 1463-2005 Test Method for Density and Relative Density of Fiber Reinforced Plastics 3 GB/T 11540-2008 Determination of Relative Density of Spices 4 GB1666-81 Determination of Specific Gravity of Plasticizers (Wechsler Balance Method) 5 GB/T 5009.2-2003 Determination of relative density of food 6 JJG 171-2004 Verification Regulations for Liquid Relative Density Balance 7 GB1033-1986 Plastic Density and Relative Density Test 8 GB4472-84 General rules for density and relative density testing of chemical products 9 GBT-1463-2005 Test Method for Density and Relative Density of Fiber Reinforced Plastics 10 GB-T5526-1985 Method for determination of specific gravity in vegetable oil inspection 11 JB-T 611-2006 General Method for Density Testing of Chemical Reagents and Other Related Standards.



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