The essence of static electricity is the existence of residual charges. Electric charge is the fundamental physical quantity related to all aspects of electrostatic phenomena. The quantities related to potential, electric field, current, etc. are all physical quantities generated by the presence or movement of charges. In research institutes, universities, testing stations, and industrial and mining enterprises, it is often necessary to measure the charge or charge density of objects.
This instrument is a digital display charge meter designed to measure the charge of an object and can directly read the charge value. Due to the use of large-scale integrated circuits, high input impedance operational amplifiers, and electrostatic capacitors, this instrument has the advantages of high accuracy, stable performance, small size, simple operation, and convenient use. It can be matched with any shape or size of Faraday tube and other advantages.

Meltblown fabric:
Meltblown fabric is the core material of masks, mainly made of polypropylene as the main raw material, and the fiber diameter can reach 1-5 microns. The ultrafine fibers with multiple gaps, fluffy structure, and good anti wrinkle ability have a unique capillary structure, which increases the number and surface area of fibers per unit area, thus making the meltblown fabric have good filtering, shielding, insulation, and oil absorption properties. Can be used in fields such as air and liquid filtration materials, isolation materials, absorbent materials, mask materials, insulation materials, oil absorbing materials, and wiping cloths.

HEST-111Melt blown fabric electrostatic charge testerScope of application:
1. Detect the charged electricity of anti-static work clothes and textiles
According to the national standard GB12014-89 "Anti static Work Clothes", place the work clothes into the friction chamber of the drum wiping machine to make them charged,
Put the work clothes with static electricity into the Faraday tube and read the charge value from the EST111 digital charge meter. After resetting, the next measurement can be carried out.
If measuring the charged amount of textiles, it can be done according to the national standard GB/T12703-91 "Testing Methods for Electrostatic Properties of Textiles".
2. Measure the charged amount of various powders, liquids, and solids
When measuring the charged amount of powder, different shapes and specifications of Faraday tubes can be made according to the amount of powder being measured. The way powder is charged can be through frictional charging or charging in an electric field. Measure the charge of dust in an electric field.
It is also possible to make the powder slide down from the chute and become charged.
3. Measure the charge transfer amount of spark discharge

Spark discharge occurs when an electrostatic non-conductive object with static electricity approaches a grounded metal body. The discharge amount can be measured accurately using a digital charge meter.4. Measure the self capacitance and mutual capacitance of metal bodiesAfter the metal body is charged with static electricity (voltage V), the electric charge Q of the metal ball is measured using a Faraday tube and a charge meter, and the electric capacity is calculated using the formula C=Q/V.
HEST-111
Melt blown fabric electrostatic charge tester
Main purpose:
Measure the charged electricity and charge density of anti-static work clothes and textiles (in accordance with the requirements of GB12014 and GB12704).
Measure the charged amount of various powders, liquids, and solids.
Measure the amount of electrostatic spark discharge.

Study the series of frictional charges.Measure the capacitance of an electrostatic conductor.Measure the surface potential and charge density of an object.
HEST-111
Melt blown fabric electrostatic charge tester
characteristic:
No need for calculation, display the charge value directly in numbers.
Wide measurement range, suitable for the needs of different measured objects.
High precision, high resolution, and good linearity.
The reading is stable.
Equipped with a reset switch, the reset operation is convenient.
High cost-effectiveness and low charge measurement solution
*Low 0.1pC measurement
4-bit reading resolution
Up to 500 readings per second

Built in 485 simulation modeIRS-232 interfaceAnalog Output
HEST-111
Melt blown fabric electrostatic charge tester
Technical indicators:
1. HEST11 measurement range: ± 10pC to ± 20 μ C (± 1 × 10-11 to ± 2 × 10-5).
2. Display: 3 1/2 digit LED display, capable of displaying the positive and negative polarity of charges. Negative polarity displays a "-" sign.
3. Accuracy: ± (0.5% reading+2 digits).

4. Power supply: 220V, 50HZ AC power consumption is about 3W.
5. Usage environment:- 10 ℃~45 ℃, 80% RH.
6. Dimensions: 220 mm x 230 mm x 70 mm.
Typical applications: