This section provides an overview for electrometers as well as their applications and principles. Also, please take a look at the list of 10 electrometer manufacturers and their company rankings. Here are the top-ranked electrometer companies as of June, 2023: 1.CNMC Company Inc., 2.Standard Imaging, Inc..
Table of Contents
An electrometer is a measuring instrument that can accurately measure electric potential, voltage, etc. by measuring the potential difference between two points in a circuit. It is possible to make measurements without drawing current from the circuit by utilizing the electrostatic attraction and electrostatic repulsion between charged conductors.
Quadrant electrometers and oscillating capacitance electrometers are the most common types. The quadrant electrometer uses a movable piece of metal (four separate disks suspended by a wire) to measure, in addition to potential, low current and low power factor (an indicator of low effective utilization of power consumption in the power supply). The vibration capacitance electrometer converts a DC input into AC by changing the electrical capacitance in parallel with the input and then amplifying it further to read the output. However, since it requires skill to handle, digital multimeters have been widely used in recent years.
Electrometers are used in the following cases.
The oscillating capacitance type works by oscillating the electrodes of the input capacitor, the voltage is converted to an AC voltage proportional to the applied DC voltage that is applied to the electric circuit from a power source or circuit from another source and amplified by AC.
Use a field effect transistor or Electrometers vacuum tube. Compared to common voltmeters, the input resistance is very high (1014 to 1016 Ω), so they are used to measure electric potential, insulation resistance, electric charge, and small currents in fields such as radiation, static electricity, and insulating materials.
Since there are various types of electrometers, the principle of a surface potential measuring instrument used to measure static electricity is introduced here as an example.
The principle of the potential surface sensor, which is the measuring part of the surface potential meter, is based on the electrostatic induction phenomenon. Electrostatic induction is the phenomenon that when a charged object is brought close to a conductor, charges of the opposite polarity to the charged object are attracted to the side closer to the charged object.
In electrometers, when the sensing electrode receives the electrostatic field strength (a value indicating the strength of the electric field, which is proportional to the charged potential of the charged object), an induced charge is generated. When the electrostatic field strength is varied periodically at the vibrating electrode, the induced charge also changes periodically in tune, and a displacement current flows from the sensing electrode to ground (earth pole). By converting the current that flows at this time into an AC voltage signal with resistance, the charged potential of a charged object can be determined. Since the measured value is affected by distance, object size, and environmental conditions (temperature, humidity, etc.), it is necessary to keep these factors constant for comparison.
This section describes how to use the redox electrometers and the precautions to be taken in its use.
First, the tip of the electrode must not be allowed to dry because potassium chloride in the electrode will precipitate and block the hole at the tip.
Also note that when measuring with an oxidation-reduction potential meter, stir the water with the electrode in order to average the water.
The main possible reason for abnormal readings on an oxidation-reduction potential meter is the adhesion of water stains or oxide film. If water stain adheres to the sensor, lightly scrub the tip of the sensor with a soft brush and rinse it with tap water. If the oxidation-reduction potential value still shows an abnormality, it is recommended to wash the sensor with a soft brush or something similar with diluted neutral detergent.
If oxide film adheres to the sensor, a detection pole polisher should be used. An oxide film may form even if the sensor has just been purchased because of the generation of oxygen due to shaking during transportation. Also, when measuring clean water, care should be taken to avoid the formation of oxide film due to the high oxygen content.
*Including some distributors, etc.
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Keysight Technologies, Inc. was founded in 1939 and headquartered in Santa Rosa, California. Keysight is a global developer and manufacturer of electronic design and test solutions to communications, networking, aerospace, defense, and government, automotive, energy, semiconductor, electronic, and education industries. Keysight’s communications solutions group solutions include electronic design automation software; radio frequency and microwave test solutions, hardware and virtual network test platforms and software applications, as well as optical laser source solutions. Keysight’s electronic industrial solutions group offers various design tools and verification tools. Keysight offers product support, technical support, and training and consulting services. It sells its products through direct sales force, distributors, resellers, and manufacturer's representatives.
Hioki E.E. Corporation was founded in 1935 and headquartered in Ueda, Nagano. Hioki provides testing & analysis, manufacturing & inspection, and equipment maintenance to industries including mobility, battery, motor, energy, electronic components, and infrastructure. Hioki’s has 10 primary product categories which are: recorders and data loggers including oscilloscopes, LCR/Resistance Meters, safety testing including signal generators and calibrators, power meters including power quality analyzers, probes & sensors, optical & PV maintenance & telecommunication, environmental measuring, DMM & testers & field measuring, IoT & new solutions & meter relay, and bare board & package testing.
Ranking as of June 2023 in United States of AmericaDerivation Method
|1||CNMC Company Inc.||50%|
|2||Standard Imaging, Inc.||50%|
Ranking as of June 2023 GloballyDerivation Method
|3||Standard Imaging, Inc.||12.9%|
|6||SMT - Setzer Messtechnik.||9.7%|
|7||CNMC Company Inc.||9.7%|
Derivation MethodThe ranking is calculated based on the click share within the electrometer page as of June 2023. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.
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