The opto-mechanical LaserCM particle counter features a continuous wave, single-point source laser. Automatic Particle Counters (APC’s) have been widely used for many years to monitor the condition of hydraulic fluids. However, only recently have APCs become flexible enough to leave the lab and work on-line and produce credible and accurate results. The LaserCM and several versions of it were developed by Parker Hannifin’s
hydraulic filter division in the U.K.
The most common monitoring technique used in APC’s is that of light obscuration or light blockage. The LaserCM works like this:
Particles are measured by a photo diode that converts light intensity to a voltage output which is recorded against time. As the particle moves across the window the amount of laser light lost is proportional to the size of the particle. This reduction in voltage is measured and recorded. This voltage loss relates directly to the area of the particle measured, is changed into a positive voltage and then in turn changed into a capacitance value. This value is counted and stored in the LaserCM computer in one of 6 channels according to particle size.
Readouts are displayed on the hand-held LCD in the accepted ISO and NAS standards ready for hard copy printing or RS232 computer download. The on-board computer allows storage of up to 300 test results.
On-line APC’s must be able to test oil samples however delivered to the machine. Parker Hannifin U.K. Ltd. had to develop a way to ensure the on-line APC could test a sample without diluting it, a conventional laboratory technique, and a difficult practice for a portable unit. By careful design and window sizing, the unit measures gravimetric levels up to 310 mg of dirt/litre, (equivalent to up to 4 million particles >5 micron per 100 ml), without making the instrument susceptible to counter saturation.
Other features include:
- Instant, accurate results are available after a 2 minute test cycle.
- Data entry allows individual equipment footprint record
- Data graphing selectable via the integral printer
- Auto 300-test cycle logging via LCD handset input.
- RS232 serial port computer interface.
- Limit level output to control peripheral equipment such as off-line filtration via internal relay limit switches.
- Auto-testing allows conducting automatic sequencing tests on flushing systems, for example.
- Bar code swipe wand allows handset data loading.
- Worldwide service and technical support.
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Nguyen Hong Duong says
Dear Sir or Madam,
My name is Nguyen Hong Duong from Techno Vietnam, nice to contact you.
We are trading company for testing and measuring equipments with after sales service.
I am doing project and our custumer need a Laser Particle Counter machine which has specification:
Laser package: Twin laser and twin optical diode detectors
Sensitivity: >4,6,14,21,25,38,50,68,µm(c), micron range to revised ISO 4406 Standard
Accuracy/repeatability: Better than 3% typical
Operating temperature: + 5 to + 80°C
Fluid compatibility: Mineral oil & petroleum based fluids, and Skydrol(consult MP FILTRI for other fluids)
Computer interface: RS 232 communication port (Standard)
Hose connections: Microbore pressure hose 1.5 m long with minimess fittings (5 m & 10 m lengths available).
Do you have product which is the same as this machine?
Could you send ne quotation for Model which you have to CIF Hai Phong Please.
I am looking forward to hearing from you soonest and hope to receive your cooperation.
Thank you and best Regards.
Mr.Nguyen Hong Duong
H/P: (+84)912 086 155
TECHNO VIETNAM TRADING CO., LTD. http://www.techno.com.vn
Unit 701, 7th Flr, Blue Star Office Building, 93 Linh Lang Str., Ba
Dinh District, Hanoi
Tel: +84 (4) 3211 5501~3 Fax: +84 (4) 3211 5504, Tax Code: 0104928071
Email: firstname.lastname@example.org, email@example.com
TECHNO “Technologies of measures” and “Sourcing solutions
Paul Dvorak says
Mr. Hong Duong:
I would suggest contacting the manufacturer of the equipment, Parker Hannifin. Their website is here: http://www.parker.com/portal/site/PARKER/menuitem.de7b26ee6a659c147cf26710237ad1ca/?vgnextoid=fcc9b5bbec622110VgnVCM10000032a71dacRCRD&vgnextfmt=EN&vgnextdiv=&vgnextcatid=11683&vgnextcat=LASER+CM&Wtky=MONITORING
and their contact page is here.