What types of oils and fluids can the Labtron’s Liquid Particle Counter LLPC-A21 analyze?

Liquid Particle Counter LLPC-A21 is designed to test a wide range of oils and fluids, including hydraulic oils, lubricating oils, turbine oils, and synthetic fluids used in various industries such as aviation, power generation, and manufacturing. It handles fluids with viscosity up to approximately 320 cSt. For higher viscosity samples, pre-heating or dilution may be required. Ensuring the fluid is free of air bubbles and moisture is important for accurate and consistent particle measurement results.

What cleanliness standards does the Liquid Particle Counter LLPC-A21 support?

Labtron’s Liquid Particle Counter LLPC-A21 supports major oil cleanliness standards such as ISO 4406, NAS 1638, SAE AS4059, and GJB 420, which are commonly used in industrial and military applications. It reports contamination levels by counting particles in different size ranges, typically from 4 microns up to 100 microns. The results are displayed either as absolute particle counts or as standard cleanliness codes, helping users interpret contamination levels and decide on maintenance or oil replacement actions.

Does the Liquid Particle Counter LLPC-A21 require sample dilution or pre-treatment?

For low-viscosity oils, Labtron’s Liquid Particle Counter LLPC-A21 can usually test the sample directly without dilution. However, for high-viscosity or heavily contaminated oils, pre-treatment steps such as heating, dilution with a compatible solvent, or vacuum degassing may be needed to ensure smooth sample flow and accurate particle detection. These preparations help eliminate air bubbles and ensure that the instrument provides reliable and repeatable readings, especially in samples that are dark or prone to foaming.

How is the Liquid Particle Counter LLPC-A21 maintained and calibrated?

Routine maintenance of the Labtron’s Liquid Particle Counter LLPC-A21 includes cleaning the sample path and flushing the system regularly to prevent clogging and contamination, especially after testing dirty or viscous oils. Calibration is typically done using ISO 11171-certified calibration fluids to ensure the optical system remains accurate. Users are advised to perform verification checks periodically using standard reference fluids. The built-in software assists with calibration alerts and maintenance schedules, supporting consistent performance and reliable cleanliness data.

What is the working principle of the Liquid Particle Counter LLPC-A21?

Labtron’s Liquid Particle Counter LLPC-A21 uses the light blockage method, where a laser beam shines through the oil sample and particles passing through block the light. Each interruption is detected and measured, allowing the instrument to count and size the particles accurately. This method provides precise contamination analysis and supports rapid testing of oils and fluids. It is widely used for monitoring oil cleanliness in accordance with standards such as ISO 4406, NAS 1638, and SAE AS4059.

Liquid Particle Counter LLPC-A21

Name: Liquid Particle Counter LLPC-A21
Brand: Labtron
SKU: LLPC-A21
Rating: 4.8 (690 reviews)

Liquid Particle Counter LLPC-A21 is used for detecting the size and quantity of solid particles in liquids by the principle of the light blocking method. It can measure the pollution levels and insoluble particles solid particles in oil samples. Its desktop design offers less space consumption for in small working space. The counter is easy to calibrate and offers great accuracy and can meet the standard requirement. Additionally, it configures high-performance large-sized particle counting sensors. Our particle counter supports an industrial computer Windows system allows instrument control and calculation.

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Light Source	Semiconductor laser
Particle Size Range	1～100 μm or 4～70 μm
Detection Channels	32 pieces, can be 0.01μm interval arbitrary set particle size
Sensitivity	1μm or 4μm
Resolution	Better than 10%
Sample Detection Viscosity	< 650 cSt
Sampling Volume	0.3 ~ 100ml, 0.1ml interval
Sampling Accuracy	± 41/2 rating
Sampling Speed	5 ~ 60 ml/min
Power Supply	220 V ± 10％，50 Hz；180 W
Dimensions (L×D×H)	355 × 400 × 620 mm
Net Weight	19 kg

Highly accurate
Different Calibration options for sample type
Computer connectivity
Display screen
User-friendly

The Liquid Particle Counter LLPC-A21 is designed to detect the size and quantity of solid particles in liquids by the principle of the light blocking method. Our particle counter supports an industrial computer Windows system allows instrument control and calculation.

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Liquid Particle Counter LLPC-A21 Catalog

Available Range :

Liquid Particle Counter LLPC-A20 : Semiconductor laser Liquid Particle Counter LLPC-A10 : Semiconductor laser light

Models of Liquid Particle Counter

Labtron liquid particle counters provide precise and dependable results by detecting and counting particles using the photoresist technique. They have extensive detection ranges, several measurement channels, and high-precision laser sensors. These have sophisticated data processing systems, integrated printers, and LCD panels for easy operation and analysis. They offer low noise levels and consistent performance in accordance with international standards. Our liquid particle counters come with air purification systems for various sectors and allow several calibration curves.

Liquid Particle Counter LLPC-A20

Particle Size Range : 0.8μm to 600μm
Sensitivity : 0.8μm or 3μm (selectable)
Light Source : Semiconductor laser
Detection Channels : 8 to 64 channels

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Liquid Particle Counter LLPC-A10

Measurement range : 1 to 250 µm (25 sensors) 1 µm to 320 µm (32 sensors) 2 µm to 400 µm (40 sensors)
Light Source : Semiconductor laser light
Measurement Channels : 8 channels
Particle size : 1 µm (2 µm) to arbitrarily set within 100 µm

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Liquid Particle Counter LLPC-A30

Test range : 1 to 500μm
Full channel settings : ≥5μm, ≥8μm, ≥10μm, ≥12μm, ≥25μm, ≥100μm (customizable)
Pharmacopoeia standards : ≥10μm, ≥25μm
Drug packaging material channel : ≥5μm, ≥10μm, ≥25μm

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Liquid Particle Counter LLPC-A21 FAQ's

Liquid Particle Counter LLPC-A21 is designed to test a wide range of oils and fluids, including hydraulic oils, lubricating oils, turbine oils, and synthetic fluids used in various industries such as aviation, power generation, and manufacturing. It handles fluids with viscosity up to approximately 320 cSt. For higher viscosity samples, pre-heating or dilution may be required. Ensuring the fluid is free of air bubbles and moisture is important for accurate and consistent particle measurement results.
Labtron’s Liquid Particle Counter LLPC-A21 supports major oil cleanliness standards such as ISO 4406, NAS 1638, SAE AS4059, and GJB 420, which are commonly used in industrial and military applications. It reports contamination levels by counting particles in different size ranges, typically from 4 microns up to 100 microns. The results are displayed either as absolute particle counts or as standard cleanliness codes, helping users interpret contamination levels and decide on maintenance or oil replacement actions.
For low-viscosity oils, Labtron’s Liquid Particle Counter LLPC-A21 can usually test the sample directly without dilution. However, for high-viscosity or heavily contaminated oils, pre-treatment steps such as heating, dilution with a compatible solvent, or vacuum degassing may be needed to ensure smooth sample flow and accurate particle detection. These preparations help eliminate air bubbles and ensure that the instrument provides reliable and repeatable readings, especially in samples that are dark or prone to foaming.
Routine maintenance of the Labtron’s Liquid Particle Counter LLPC-A21 includes cleaning the sample path and flushing the system regularly to prevent clogging and contamination, especially after testing dirty or viscous oils. Calibration is typically done using ISO 11171-certified calibration fluids to ensure the optical system remains accurate. Users are advised to perform verification checks periodically using standard reference fluids. The built-in software assists with calibration alerts and maintenance schedules, supporting consistent performance and reliable cleanliness data.
Labtron’s Liquid Particle Counter LLPC-A21 uses the light blockage method, where a laser beam shines through the oil sample and particles passing through block the light. Each interruption is detected and measured, allowing the instrument to count and size the particles accurately. This method provides precise contamination analysis and supports rapid testing of oils and fluids. It is widely used for monitoring oil cleanliness in accordance with standards such as ISO 4406, NAS 1638, and SAE AS4059.