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ERACOUNT XS is the smallest and fastest field particle counter. At the push of a button, the laser-based analyzer measures and displays the ISO 4406 particle size channels ≥ 4 µm(c), ≥ 6 µm(c) and ≥ 14 µm(c) – all within 60 seconds using only 10 mL of sample. ERACOUNT XS counts particles in eight channels when connected to one of eralytics’ other OCM analyzers.


  • ISO 4406
  • ISO 11171
  • ISO 4402
  • SAE AS4059

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ERACOUNT XS is the analyzer of choice for fast particle measurements with lab grade precision directly in the field. Initial failures in hydraulic and lubricating oil systems lead to the early appearance of big particles. ERACOUNT XS easily detects every particle that passes the sensor. The full performance of this laser-based particle counter is achieved by operating it connected to another eralytics analyzer, like the kinematic viscometer eravisc X or the FTIR spectrometer eraspec oil.



ERACOUNT XS is an extremely robust all-metal device weighing only 3 kg. It can resist harsh environments such as extreme temperatures or any kind of vibrations. It is the perfect analyzer for the contamination detection and condition monitoring of hydraulic and lube oil systems, test rigs and parts cleaning.

  • eraoil_web_application
  • eracount-xs-web


ERACOUNT XS measures the cleanliness of any lubricant or petroleum product with viscosities up to 1000 cSt at 22 C° (up to ISO VG 320) over a pressure up to 2 bar. With its eight particle size channels ERACOUNT XS can detect even larger particles, offering the possibility to alert in case of abrasion or machine failure. The instrument is calibrated according to the international standard ISO 11171 and traceable to NIST standards.

  • Measuerment with eravisc X
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Your features at a glance

  • 10mL sample volume
  • Measurement of up to 8 different size channels
  • Robust, full-metal device with only 3 kg of weight
  • Flow rate 10 ml/min
  • Ideal for many applications: hydraulic & lube oils, fuels

Watch this video to get an overview on the easy operation of  ERACOUNT XS.


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Technical Specifications

Available Test Methods
ISO 4406, ISO 11171, ISO 4402, SAE AS4059
Particle size channels
4, 6, 14 µm
21, 25, 30, 38, 70 µm - in combination with any eralytics analyzer

Flow rate
10 ml/min (default), optional 25 ml/min
Min. sample volume required
5 ml at 10 ml/min, 12.5 ml at 25 ml/min
Min. measurement time
30 secondes
Max. viscosity
1000 cSt @ 22°C or 300 cSt @ 40°C
Max. accepted particle size
230 µm
Sample temperature
5 – 60°C
Operation temperature
-10 to 50°C
USB-C: Communication to eralytics analyzer
Power requirements
24 VDC, max. 80 W
Data transfer
ASCII Code, USB interface
Dimensions (W x H x D)
20 x 19 x 26 cm (7.9 x 7.5 x 10.2 in)

3 kg (6.6 lb)

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