OWD Watercut Meter


OWD™ insertable model

With 1% of full scale accuracy regardless of range, the rugged OWD™ Water Cut Meter is the ideal instrument for monitoring water-in-oil concentrations in a variety of applications from production to pipeline. The OWD™ offers continuous, real-time, water cut data.

Unlike other water-cut meters, the OWD's patented multi-antenna design reads both oil continuous and water continuous modes simultaneously and automatically transitions between the two. Each of the two antennas operates with a microwave frequency ideal for water or oil continuous phase for higher accuracy and repeatability. In essence, it is two instruments operating in parallel with a single microprocessor. The result is measurement over a true 0-100% range with +/-1% accuracy regardless of water content.

The OWD™ also uses internal references to auto calibrate for drift caused by temperature changes of the electronics, and automatically compensates for changes in fluid temperature.

The simplicity of design and quality of engineering employed in the OWD™ Water Cut Meter mean there are no moving parts. The output signal can be sent to Flow Computers, SCADA, PLC’s or to a Central Control Room for logging or display on chart recorders or monitors.

For ranges up to 10% water, the KAM LRW Low Range Watercut meter offers industry-leading accuracy and repeatability with automatic density correction throughout the entire API gravity range.

CLICK HERE for a whitepaper on Water Content Determination in Crude Oil



  • The patented multi-antenna design of the KAM OWD Water Cut Meter consists of one antenna designed for oil-continuous phase, one for water continuous phase, and the emulsion phase is measured based on combined data from the two.


  • Full 0-100% range
  • Automatic temperature correction
  • 1% of full scale accuracy
  • All requisite electronics housed within unit (can also be mounted remotely) and included in unit price
  • No salinity offset required


  • Real-time production management, optimization, and automation
  • Marine, truck, and rail loading and unloading
  • Refinery: incoming crude stream, feedstock
  • Crude batching
  • Well head: automatic well test, multiphase separators



Range (water in oil) 0-20% 0-30% 0-40% 0-100%
Accuracy (at listed range) 0.20% 0.30% 0.40% 1.00% 


Media: Crude oil, refined products and chemicals
Material: Wetted parts – 316 stainless steel (Optional NACE MR-01-75 Compliance Available)
Fluid temp: To 300ºF (149ºC) Optional high temp (600ºF/315ºC) model available
Electronics temp: -4º to 131ºF (-20º to 55ºC)
Power: 24 VDC/1 amp at 24 watts
Accuracy: 1% of full range
Repeatability: +/- 0.01%
Resolution: +/- 0.01%
Pressure ratings: ANSI 150, 300, 600, 900, 1500
Sensor dimensions: Ø1.5″ x 6.62″ (38mm x 168mm)
EX enclosures: Sensor electronics – 4.6″ x 7.1″ x 4.4″ (117mm x 180mm x 112mm)
Shaft length:  Off-the-shelf lengths are 12″, 24″, and 36″ (305mm, 610mm, 915mm)
Additional lengths available
Pipe Size:  ½” to 72″ (15mm to 1829mm)
Weight: from 20 lbs. (9kg)
Certifications:  PTB 08 ATEX 1026 (Ex II 2 G Ex db IIB T6 Gb)
Hazardous area approvals: Class I, Div 1, Group C and D equivalent (KAM OWD and EX Enclosure)


  • Selectable 4–20 mA with adjustable range or 0–5 VDC
  • Alarm or relay (digital contact closure)
  • RS232 Communication interface for calibration, connection to PLC
  • HART Protocol
  • RS485 Modbus interface



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KAM OWD Application Data Sheet

  • Date Format: DD slash MM slash YYYY

  • Pipeline and installation type (please specify units)






  • Flow Conditions

    Please note: proper mixing in accordance with API Chapter 8.2 is required for accurate OWD performance. In order for KAM to properly quote an OWD, please fill out all flow conditions fields to the best of your ability. Should pipeline mixing be required, the quote will include an appropriate solution to fulfill this requirement (SMS, SMP, or ML).

  • (If yes, a KAM IT Insertion Tool will be required for installation and included in quote)

  • Shaft Calculator

    Determine minimum shaft length for proper insertion in the pipeline using the formula below. See the image below for references.