KAM Simple Precision
OWD Watercut Meter
KAM OWD Oil Water Detector

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 concentrations in a variety of applications from production to refinery. 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. The result is measurement over a true 0-100% range.  Water-cut measurement is fully automatic with no need for operator intervention or supervision.

The OWD also uses internal references to auto calibrate for drift caused by temperature changes of the electronics, the aging of the electronics components, fluid pressure, and 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 the 0-10% range, the KAM LRW Low Range Watercut meter offers industry-leading accuracy and repeatability with automatic density correction throughout the entire API range. 

CLICK HERE for a whitepaper on BS&W for Density Variation in Truck Unloading

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

Related Links:

API MPMS Technical Report 2570 Continuous On-line Measurement of Water Content in Petroleum



  • 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, hastelloy, PEEK 
(Optional NACE MR-01-75 Compliance Available) 
Hazardous areas: PTB 08 ATEX 2016 Issue 01
IECEx PTB EX 19.0048
Ex db IIB T6 Gb 
Fluid temp: -40º to 176ºF (-40º to 80ºC)
High temp model available to 600ºF (315ºC)
Fluids below 32ºF may require heat tracing
Electronics temp: -40º to 160ºF (-40º to 70ºC)
Power: 24 VDC/1 amp at 24 watts
(110/220 conversion available)
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 - 3” x 6” x 3” (76mm x 152mm x 76mm)
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 B, C and D (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

The three main models available include the KAM OWD Insertable sensor, which can be inserted directly into your pipe or tank through a hot tap, helping you avoid costly drainage, the need for a bypass loop, or having to cut a section in the pipe.  The KAM OWD Spool is designed for well-head applications and includes a KAM SMS Static Mixing Spool and an integrated sample valve.

To ensure the highest degree of accuracy, the flow must be homogeneous. KAM provides mixing calculations specific to your applications and accordingly recommends the installation of the patented KAM ML Measurement Loop, KAM SMP Static Mixing Plate or KAM SMS Static Mixing Spool upstream of your OWD detector to create a fully homogeneous mixture in your pipeline.


A: OWD Insertable installed on a main pipe with 2", 3", or 4" flanged seal housing


B: OWD Insertable installed on a main pipe with 2" MNPT seal housing

  • Inserts and retracts without having to drain the pipe
  • Ideal for pipeline applications


C: OWD Spool on 1,” 2” or 3” seamless pipe with weld-neck flanges

  • Integrated patented KAM SMS Static Mixing Spool
  • Includes ½" sample valve with ½" pitot probe
  • Ideal for skid fabrication and automated well test applications