Contamination Control of Hydraulic and Lubricating Oils

(Werdohl, May 2013)

Contamination Control of Hydraulic and Lubricating Oils

Laser particle counter LasPaC II-I also available with ATEX certification for use in areas prone to explosion

The LasPaC II-I ("Inline") Laser Particle Counters from Stauff were developed for continuous monitoring of the contamination of mineral oils and petroleum based fluids. Units that are compatible with Phosphate Ester and Water Glycol are available on request.

Permanent installation of the particle counter in the fluid system makes it possible for the user to respond immediately to increasing contamination in the fluid, to reduce downtime of the system, and to protect it against costly failures. The device is very easy to connect to the system by means of two hydraulic test couplings of type Stauff Test 20 (adaptation thread M16x2). That way, subsequent installation of the unit is not a problem.

LasPaC II-I ("Inline") Laser Particle Counters work according to the “light blockade principle” in which two lasers shine through the liquid to be measured and illuminate a photodiode. If contamination particles in the fluid pass through the laser beam, the total amount of light that reaches the diode is decreased. Since this change is directly proportional to the size of the particles, it is possible to determine the degree of contamination from this. In the process, the unit analyses all particles inside the measuring cell as well as particle sizes that are smaller than 6 μm(c). That way, inaccuracies that can arise through partial capture or extrapolation are avoided.

The exact degree of contamination is classified in 8 channels between 4 μm(c) and 68 μm(c). Hence, the LasPaC II-I allows for a more accurate and more complete determination of the particle sizes than other units available in the market, and also makes it possible to assess contamination in coarser ranges.

The results of up to 600 standard measurements are stored in the internal memory and can be transmitted over the RS-232 interface or a USB adapter to the PC or laptop. Furthermore, an optional external monitor is available for the direct display and real time analysis of the data, which provides a way to start and stop measurements as well as to actuate the integrated flush valve. It is also no problem to install the LasPaC II-I directly into existing machine systems thanks to the optional integration of a Modbus interface.

As additional accessories, the company also supplies a coarse pre-filter to protect the unit, water-in-oil and temperature sensors, as well as sampling sets and bottle sampling units, which make subsequent analysis possible.

For use in areas that are prone to explosion, Stauff offers a special variation of the LasPaC II-I with ATEX certification (zone 2 / category 3G). This classification was realised through a modified design of the housing and connectors. Hence, the unit meets all the requirements for use in the oil and gas industry or in chemical and process technology.


Picture 1:

Standard version of the LasPaC II-I Laser Particle Counter from Stauff

(Courtesy of Walter Stauffenberg GmbH & Co. KG)

Download picture (JPG, 10x10cm, 300dpi)

Picture 2:

Available types of LasPaC II-I Laser Particle Counters: Mobile (M), Portable (P) and Inline (I)

(Courtesy of Walter Stauffenberg GmbH & Co. KG)

Download picture (JPG, 10x10cm, 300dpi)

Background Information

Walter Stauffenberg GmbH & Co. KG was founded in the 1950s in Werdohl, in the German province of North Rhine-Westphalia, and was initially a contract turning shop. Today the company operates under the trade name STAUFF, developing, producing and marketing fluid technology components for use in plant construction and mechanical engineering. In the fields of tube, pipe and hose clamps, measuring technology and hydraulic filtration, STAUFF is one of the world’s leading organisations in a growing industrial segment.

Meanwhile, more than 1200 employees (12/2012) in 18 companies generate an annual turnover of more than EUR 190 million (12/2012) worldwide. Additional distribution subsidiaries have recently been opened in Ireland, Malaysia and Vietnam. Besides the group headquarters in Werdohl Ehrenfeld, the company has production and logistics facilities in the German cities of Plettenberg-Ohle and Neuenrade-Küntrop.

Press Contact

Mr Boris Mette
Public Relations / Marketing
Tel.: +49 (0) 2392 / 916-154
Fax: +49 (0) 2392 / 916-4154

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