Particles Counters

A particle counter is a device used to detect and count physical particles. It counts the amount of particulate contamination in the air, a surface or a liquid. Examples of these particles can be anything from metal, oil, dust, shavings, ash, smoke, mold, or other biological contaminants. This instrument is very useful for meteorological and health professionals who need to determine the purity of air for breathing, water treatment, producing food and drugs or microchips in a clean room. GAOTek has developed advanced, high quality, affordable and accurate particle counters. These are versatile instruments for detecting physical particles. We bring you a stellar selection of particle counters to help you determine contamination in air or in a liquid, with the simplest operation. With precise measurements, we ensure that you will be satisfied while using our products.

GAOTek particle counters are the best when it comes to quality and high accuracy readings. The process can be carried out in an effective and efficient way with GAOTek’s selection of particle counters.


There are three primary categories of particle counters - aerosol particle counters, liquid particle counters, and solid particle counters.

Aerosol particle counters – These are used to determine air quality by counting and sizing the number of particles in the air. It is useful in understanding the cleanliness level in a controlled environment. It is also useful in determining the amount of particles inside a building or in the ambient air.

Liquid particle counters – These particle counters are also used to determine the cleanliness level of hydraulic fluids. The reason is that 75-80% of hydraulic breakdowns can be contributed to contamination.

Solid particle counters – These are used to measure dry particles for industrial applications, such as detection of particle size from a rock crusher at a mining query.

A particle counter is composed of different parts used to detect physical particles and help users navigate the device conveniently. The list below includes the systems of a particle counter.

Optical System – Typically in a device, a laser is used as light source. In many commercial instruments, it is a He-Ne laser. Particles that pass through the laser beam scatter light, which is collected by the optics and directed to a photodiode. A parabolic mirror with very high reflectivity collects the particles.

Air Flow System – This is used to isolate particles from optical components and confine the particle stream to the boundaries of the laser beam.

Electronic System - A photodetector electric signal is pre-amplified. Pulse height measurement electronics classify the signal into a size bin. The particle counter increases by one on each pulse recorded in the appropriate size bin. The display system increases by one unit in each channel on a real-time basis as the sample aerosol flow continues to enter the measuring chamber.


GAOTek thermal imagers offer many key features helpful in operating the device easily and accurately:

The on-off control is a toggle function. Pressing the on/off key turns the device on or off. If the hygrometer is left on with no activity for a period of time, the unit turns itself off to conserve battery.

Portable in size with easily accessible buttons to access the interface quickly

Six particle-size channels (0.3, 0.5, 1.0, 3.0, 5.0, 10μm)

Date and time display

Easy data downloaded to a computer

Compact and easy to handle

A low battery indicator is also included. A weak battery can cause imprecise measurements or improper operation. A low battery indicator is provided on the display to show that the battery needs to be recharged. It is required to charge the battery to make sure that you get the best results fromin the device.

Internal audible alarm

Multiple print-modes

A variable response time and a large memory to store data

A built-in printer

Integrated particle collection filter for offline analysis of optically analyzed particles


In addition to all these features, our products have a high precision, a high resolution and a quick sampling speed. More importantly, our products are affordable and offer value for money. You have different options to choose from a multitude of thermal imagers manufactured by our company.


Particle counters are commonly used in research applications listed below:

Basic aerosol research

Health effect studies

Particle formation and growth studies

Atmospheric and climate research

Environmental monitoring studies

Nanotechnology research

Combustion and engine research

Inhalation toxicology research

Mobile aerosol studies

These are some examples of where particle counters can be used. Particle counters find application in any area that requires cleanliness and hygiene. They detect a particle that can cause contamination and prevent people from conceiving health problems, especially in biological laboratories.


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