Contamination Control & Particle Counting for a range of industries
EMS can provide both the expertise and the required particle counting sensitivity for your process through using high-performance laser particle counters for essential continuous or batch monitoring.
Particle Measuring Systems products provide the highest particle counting sensitivity for chemicals, DI water, and airborne applications. EMS exclusively supply and support these industry leading products in the UK & Ireland.
Our products for use in these industries include Chemical Products, Airborne Molecular Contamination Products, Gas Products, Aerosol Products and Ultra-Pure Water Products.
Search our range of products for Semiconductor, Microelectronics and Chemical Companies below.
Click the buttons below to view the corresponding products
Ultra Pure Water

Ultra Pure Water Products
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Ultra DI® 50 Liquid Particle Counter
Sensitivity range: 0.05 – 0.2 μm
Designed for ultrapure (DI) water systems, its low zero count, large sample volume and high counting efficiency provide unsurpassed performance at 50 nm sensitivity.
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HSLIS e-Series Particle Counters M65e, M100e & M50e
Sensitivity range: 0.05 – 0.2 μm
Provides continuous, real-time monitoring of contamination levels in deionized (DI) water.
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Ultra DI® 20 Liquid Particle Counter
Sensitivity range: 20 – 100 nm
Designed for ultrapure water systems, its low zero count, large sample volume and high counting efficiency provides unsurpassed particle detection at 20 nm sensitivity.
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LiQuilaz® II Liquid Particle Counter E Series
Sensitivity range: 1.5 – 125 µm
The LiQuilaz II E15P, E20, and E20P laser particle counters are volumetric monitors with sizing sensitivities from 1.5 – 125 µm.
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LiQuilaz® II Liquid Particle Counter S Series
S02: 0.2 – 2.0 µm, S03: 0.3 – 3.0 µm, S05: 0.5 – 20.0 µm
Volumetric monitors with a variety of sizing sensitivities as low as 0.2 μm. Compatible with a wide range of process chemicals.
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20 nm Liquid Particle Counter: Ultra DI® 20 Plus
Sensitivity range: 20 – 100 nm
Designed specifically for ultrapure water systems, the Ultra DI® 20 Liquid Particle Counter quickly obtains statistically meaningful data and will count and size contaminants as small as 20 nm.
Chemicals ≥ 20nm


Chemical Products
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UltraChem® 40 Liquid Particle Counter
Sensitivity range: 40 – 125 nm
The UltraChem® 40 provides reliable contamination monitoring with the ability to detect 40 nm particles in chemicals with high molecular scatter.
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HSLIS e-Series Particle Counters M65e, M100e & M50e
Sensitivity range: 0.05 – 0.2 μm
Provides continuous, real-time monitoring of contamination levels in deionized (DI) water.
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Chem 20™ Chemical Particle Counter
Sensitivity range: 20 – 100 nm
The Chem 20™ is the first 20 nm chemical particle counter that detects larger concentrations of particles with better statistics than competitive products.
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CLS-700 T Corrosive Liquid Particle Sampler
Chemical process monitoring
The CLS-700 T is a compression sampler combined with a LiQuilaz® II particle counter for effective measurement of particles in fluids contained in unpressurized vessels.
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LiQuilaz® II Liquid Particle Counter S Series
S02: 0.2 – 2.0 µm, S03: 0.3 – 3.0 µm, S05: 0.5 – 20.0 µm
Volumetric monitors with a variety of sizing sensitivities as low as 0.2 μm. Compatible with a wide range of process chemicals.
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SLS Syringe Liquid Particle Sampler
Sensitivity range: 40 nm to 150 μm
The Syringe Liquid Particle Sampler uses a precision syringe and simple flow-path for delivering chemical samples from a sample vessel or chemical container directly to the particle sensor.
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SLS-20 Syringe Liquid Sampler
Sensitivity range: 40 nm to 150 μm
The SLS-20 Syringe Liquid Sampler enables Chem 20TM or Chem 20TM-HI particle counters to operate in batch sampling applications. It is ideal for precise, small-volume sampling.
Aerosol ≥ 10nm


Aerosol Products
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Cleanroom Particle Counter: Lasair III
Sensitivity range: 0.3 – 25.0 µm
Particle Counter is designed for cleanrooms and sets the standard for portable aerosol portable particle counters meeting the requirements of ISO 14644-1:2015 and ISO 21501-4.
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Lasair® III 110 Airborne Particle Counter
Sensitivity range: 0.1 – 5.0 μm
The Lasair® III 110 Airborne Particle Counter is a laser diode-based counter. It provides real-time measurement of yield-impacting particles with three configurations to meet your unique application needs.
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The Airnet® II 4 Channel Air Particle Sensor
Sensitivity range: 0.2 – 10.0 µm
The Airnet® II 4 Channel Air Particle Sensor measures the size and number of particles suspended in the air for real-time monitoring of defect-causing particles.
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IsoAir® Pro-E
0.3 – 5.0 µm; 1.0 CFM (28.3 LPM)
The IsoAir® Pro-E Remote Particle Counter is an effective piece of a Contamination Control Strategy using the latest technologies to streamline cleanroom monitoring while meeting global regulations.
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Handheld Particle Counter: Handilaz® Mini II
Sensitivity range: 0.2 – 10 µm
Ergonomically designed to fit in the palm of your hand. Suitable for Semiconductor, Advanced Processing and Pharmaceutical applications.
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Lasair® Pro: Airborne Particle Counter
Sensitivity range: 0.3 – 25 µm
Designed for intuitive and reliable portable and remote airborne particle counting. Meets the latest data integrity requirements, positioned for future compliance.
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IsoAir® Pro-Plus
0.3 – 25.0 µm; 1.0 CFM (28.3 LPM)
The next generation IsoAir® Pro-Plus Remote Particle Counter is designed for minimum downtime and multiple option flexibility.
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NanoAir™ 10 Aerosol Particle Counter
10 nm, Flowrate: 2.8 LPM (0.1 CFM)
Purpose-built nanoparticle counter designed specifically for use in the most critical fab spaces.
Gases ≥ 100nm


Gas Products
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Cleanroom Particle Counter: Lasair III
Sensitivity range: 0.3 – 25.0 µm
Particle Counter is designed for cleanrooms and sets the standard for portable aerosol portable particle counters meeting the requirements of ISO 14644-1:2015 and ISO 21501-4.
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Lasair® III 110 Airborne Particle Counter
Sensitivity range: 0.1 – 5.0 μm
The Lasair® III 110 Airborne Particle Counter is a laser diode-based counter. It provides real-time measurement of yield-impacting particles with three configurations to meet your unique application needs.
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HPGP-101-C High Pressure Gas Probe
Sensitivity range: 0.1 – 5.0 µm
- Continuous sampling – no missedevents
- Samples and detects at line pressure
- Monitors either reactive or inertgases
- Data constantly supplied to facility or data management software
Airborne Molecular Contamination ≥ 70ppt


Airborne Molecular Contamination Products
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AirSentry® II
Ethernet, RS-232, 4-20 mA outputs
Designed with performance in mind. A new Ion Mobility Spectrometry (IMS) cell provides part-per-trillion (ppt) sensitivity, fast response, and increased selectivity.
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AirSentry® II AMC Monitoring System
Monitors up to 30 sample locations
The most advanced Airborne Molecular Contamination monitor available, utilizing state of-the-art technology to detect and characterize airborne molecular contamination from multiple locations within a cleanroom.
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AirSentry® II Mobile AMC Detection System
AMC Monitor Mobile cart
The AirSentry II Mobile AMC Detection System is the first truly mobile system for monitoring airborne molecular contamination (AMC) in cleanrooms quickly and efficiently.