Laser Particle Monitor
LPM 1 Series
|Channel Sizes||4, 6, 14 and 21 μm(c)
(ISO MTD/ISO 11171)
|Connections||SAE - 4 (7/16-20 UNF)|
|Light Source||Laser Diode||Flow Rate||50 to 500 ml/min through the viewing area. All units offer integrated flow rate monitoring with alarms.|
|Verification||Optional certification available||Fluid Compatibility||Mineral based hydraulic and lubrication oils. Phosphate Esters optional|
|Sampling||Online continuous monitoring||Viscosity||32 SUS (2 cSt) minimum|
|Reproducibility||+ 0.5 ISO code (ISO 4406)||Operating Pressure||20 to 7,250 PSI (1.4 to 500 bar)|
|Display||Optional local display presents ISO codes and alarms||Operation Temperature||-4 to 140°F (-20 to 60°C) ambient,
-4 to 185°F (-20 to 85°C) fluid
|Power Supply||9 to 36 volts DC||IP||Rating 67|
|Output||RS-232, RS-485, 0 to 5 volts, Modbus, alarm contacts, local display||Accessories Included||DDE Software, 20 ft. (6m) fiber optic cable, operators manual|
|Reports||Particles/ml, ISO 4406 codes 4, 6, 14 and additional 21 μm(c) (ISO MTD/ISO 11171)|
Laser Particle Transducer LPT
The laser based sensor uses light blocking technology for particle detection whereby particles passing through an optical flow cell block an amount of laser light proportional to the particle size.
The resultant particle concentration data from the LPT are sent to the LIM interface module via a fiber optic cable. The configuration of the LPT has to be done through the IrDA port of any PDA with IRA capabilities.
The LPT Particle transducers have a flow inhibitor downstream of the sensor that restricts and controls fluid flow from variable pressure sources.
The pressure is reduced to near atmospheric for return to the hydraulic reservoir. The inlet pressure ranges from 1.4 to 500 bar (20 to 7250 PSI) in three models are listed below.
The LPT's are available with or without a LED display. The three digit display shows the selected ISO code value or other function parameters.
Available types of LPT
LIM-4 and LIM-5
Interface Module LIM
The LIM-1 receives the raw serial data from the LPT transducer via a fiber optic cable and transmits them directly to the computer.
Special adaptors also allow the integration into an ethernet-computer network.
All signal outputs, as well as the input supply voltage (9 to 36 VDC), are connected to the LIM-3 through a DB-15 connector.
LIM-4 and LIM-5
The ISO 4406 code number displayed is categorized in four size channels (>4, >6, >14 and >21 μm(c) ). The ISO number represents the number of particles counts per ml fluid. The user also can select internal information about the transducer (Temperature C, laser mA, Cal V, Node ID status code).
Alarm levels can be programmed for any of the four particle size channels. When set, an alarm indicator will flash if the alarm level is reached. For the LIM-4 the alarm is activated if the measured ISO numbers exceed the set alarm level and for the LIM-5 the alarm is activated if the ISO number falls below the set level.
Alarms on the LIM-4 and LIM-5 may be deactivated by pressing any button. Supply voltage is external and can be from a 9 to 36 VDC source.
Available in: Alabama, N.W. Florida, Kansas, Mississippi and W. Missouri