KAM Simple Precision
OID Optical Interface Detector

OID™ insertable model

The KAM OID Optical Interface Detector has been the preferred sensor for interface detection between refined products since its inception in 2000. Like eyes in the pipe, it provides accurate, real-time data on product interface even when density does not change between products, allowing operators to make cuts with confidence and significantly reduce product downgrade and/or transmix. 

Fiber optics within the patented optical probe respond to the absorption, fluorescence, and refractive properties of the fluid, and the combined return signal is then turned into an “optical signature,” recognizing qualitative changes in pipeline fluids.

The OID is designed for minimal maintenance and ongoing ease of use. Long-lasting LED light sources ensure long-term, stable performance and minimal power consumption. All electronics are located in an explosion-proof enclosure directly on the end of the probe for  a complete and compact unit with maximum installation flexibility.

Measurement is completely automatic and the output signal can be sent to the SCADA, PLC’s, or to a Central Control Room.

CLICK HERE for a white paper on Interface Detection in Liquid Pipelines.

CLICK HERE for an article published by the Oil & Gas Journal showing testing results of an OID.


  • Patented optical probe utilizes optimal wavelength for interface detection
  • Measures the absorption, fluorescence, and refractive properties of the fluid
  • Combined fluid properties are output as an analog signal or "optical signature" unique to each product
  • Output signal can be sent to the SCADA, PLC’s, or to a Central Control Room
  • Measurement is fully automatic


  • Detects the interface of specialty fuels such as ULSD (Ultra-Low Sulfur Diesel)
  • Lenses do not require cleaning
  • Electronics are housed directly on the atmospheric end of the probe
  • No moving parts
  • Insertable model installs without having to drain the pipe
  • Uses LED's for long-term performance with minimal power and maintenance requirements


  • Batching
  • Interface detection
  • Product transmix management
  • Product downgrade management
  • Pipeline automation
  • Chemicals interface
  • Clear oil interface
  • Quality control
Media: Refined products
Material: Wetted parts–316 stainless steel
Power: 12–24 VDC 15 Watts max
Output: 4-20 mA, RS485, RS232
Fluid temp.: -40º to 176ºF (-40º to 80ºC)
Electronics temp.: -4º to 140ºF (-20º to 60ºC)
Pressure ratings: ANSI 150, 300, 600, 900
  Threaded models (3/4", 1", 2" MNPT) designed max. working pressure of 3000 psig
Mounting: 3/4" and 1" MNPT
  2" MNPT Seal Housing
  2", 3", or 4" Flanged Seal Housing
EX enclosure: 4.6" x 7.1" x 4.4" (117mm x 180mm x 112mm)
Shaft length: 12" to 60"
Pipe size: 3/4" to 48"
Weight: from 10 lbs. (4.5kg)
Certifications: PTB 04 ATEX 1027 PTB04 ATEX 1027
(Ex II 2 G Ex db IIB T6 Gb)
NEMA4 (IP66 equivalent)

OID Insertable / Retractable with flanged seal housing

Available with  2", 3", or 4" flanged seal housing

OID Insertable / Retractable on a main pipe with 2" MNPT seal housing

OID Flow Through on an analyzer loop

Available with 3/4" or 1" MNPT