RMF Systems Smart Off-Line Units – OLUS4A

RMF Systems success with depth filtration on hydraulic and lube oil systems and the growing demand for contamination monitoring sensors to optimize the application of the filters has led to the development of the next generation in RMF Systems technology:  RMF Off-line filters with an integrated CMS unit.

Smart Off-line Units enable machine operators to keep their hydraulic oil clean and monitor contamination levels real-time in one economical installation.  The integrated CMS (Contamination Monitoring Sensor) can be combined with the entire selection of Off-line Units in the RMF Systems range.

The CMS in-line contamination monitor automatically measures and displays particulate contamination, moisture and temperature levels in various hydraulic fluids where ongoing measurement or analysis is required.

  • Measures and displays the international standard formats
    • ISO 4406: 1999, NAS 1638, AS 4059E and ISO 11218
  • 8 Channel solid contamination measurement
  • Moisture (RH) & temperature option
  • 9-36 Volt DC
    Large backlit display and keypad
  • Multicolour LED status alarms
  • Programmable alarm relays
  • PC/PLC operation
  • Windows based software included
  • RS 485 communication standard / USB optional


  • Steel industry
  • Plastic moulding industry
  • Maritime industry
  • Petro chemical industry
  • Paper industry


  • Extremely clean oil due to high filtration efficiency
  • Permanent reporting of contamination levels
  • Permanent reporting of moisture RH % and temperature
  • Prevention of channel forming by radial filtration direction
  • Large dirt and water holding capacity
  • Compact and easy maintenance
  • Environmentally friendly elements available
  • Longer usage life for oil and components
  • Reduces cost of ownership


Product Specs

Filter housing material: Anodised Aluminium
Seal material: NBR or FPM (see ordering code)
Nominal flow: 8.4 l/min
Standard max. oil temperature: 80 °C
Max. pressure filter housing: 20 bar
Inlet connection: ½” BSP female
Outlet connection: EW 22L
Power supply electric motor: Various
Suitable filter elements: Cellulose and Glass Fiber
By-pass opening pressure: 6.2 bar (at 0 bar back pressure)
Pump safety valve: 15 bar
Max. tank volume: ± 5,400 l
Fluid compatibility: Hydraulic fluids according to ISO 2943
Approximate weight: 39.0 kg

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