OLC-2 is a device for liquid level observing and controlling. There is two potential free output relays which are separately programmable. The control relay has two separate contacts, one closing and the other one opening, both 8A 250 V AC. The alarm relay has one change over contact, 6A 250V AC. Both relays are easily programmable to many different function modes. OLC-2 has self diagnostics which gives an alarm if the probe or light cable breaks down.

OLC-2 senses the intensity of light coming back from the OLP probe and determines the liquid level accordingly. The amount of light returning from the OLP depends on the tilting angle of the OLP probe. The probe senses three different liquid levels, which are set by the length of the light cable and the
position of the cable weight.

The probe is made of polypropylene (PP) and the light cable is polyethylene (PE) isolated, so they are very strong against different chemicals. The OLP probe is delivered in three light cable lengths: 3m, 5m or 10m (the light cable
must not be shortened).


  • For Potentially Explosive Environments (<Ex> Ii 1 Gd)
  • No Need For Exi-Isolator Unit
  • Very Small Probe Ø23mm – Fits Through 3/4” Adaptor
  • Three Level Indication
  • Two Separately Programmable Output Relays
  • Patented Finnish Quality Product

Click on PDF for specifications

Blanes Pressure Solutions supplies a comprehensive range of pressure measurement instruments.

Our customer base is vast with a vast range of blue chip companies as customers, ranging from Afrox, to including but not limited to, Air Products, Air Liquide, Anglo American, De Beers, Eskom, Impala Platinum, Unilever, SAB Miller, Sappi, and Sasol, to name but a few. Agreements with various manufacturers around the world, result in a comprehensive range of indicators, switches, transmitters and accessories.

Blanes Pressure Solutions was founded in 2002 to take over the pressure business of Blanes Instruments CC, and can trace its pedigree back to 1893, when Robert Blane left Scotland to make his fortune on the Witwatersrand.

For more information on placing orders, after care and maintenance services you can contact our Sales Manager Ronel Olivier on ronel@pressuresolutions.co.za or 011 422 1749.

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