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Watercut Meters

ZelenTech ZT-100 Watercut Monitors (also known as BS&W, OWD, WFM or Water in Oil Analyzers) offers you unmatched flexibility as we offer virtually unlimited number of configurations.

The ZT-100 Series of Watercut Meters can be installed inline, in bypass or as insertion. Built to any piping spec in the materials of your choice. 1 inch or 48 inch, we cater for all sizes.

The ZelenTech ZT-100 Watercut Monitor determines the percent watercut in an oil emulsion without requiring the physical separation of the fluids. The emulsion stream is continously monitored for capacitance and converted into percentage of water by the Watercut Monitor logic.

The Zelentech Watercut meter measures water in oil primarily in crude oil and is used in applications like fiscal metering, desalting, export metering, process control, on test separators, on- and offloading, etc.

  • Highly Accurate Online Water Cut Measurement
  • Temperature compensation
  • Optional Density Compensation
  • Optional Built-In Flow Conditioning
  • 4-20mA, HART, RS-232
  • Low power 24 VDC
  • Variety of measurement ranges
  • Variety of designs
  • Variety of certifications
  • Detection from 0.01%
  • BS&W Analyzer / Probe - Monitor
  • Net Oil
  • LACT
  • Production Wells
  • Water Content Reporting
  • Crude Oil Analyzer Systems
  • Water in Condensate Analysis
  • Fiscal Metering Skids
  • Oil Transportation
  • Tank Truck Unloading
  • Ship Unloading
  • Bunkering
  • Crude Oil Pipelines
  • Refined Oil Pipelines
  • Oil and Gas Exploration
  • Crude Oil Production Facilities
  • Offshore Oil Exploration
  • Tank Farms
  • Oil Terminals
  • Refineries
  • Crude Oil Fiscal Metering
  • Oil Emulsions
  • Desalters
  • Dewatering
  • Separator monitoring

Design and Integrity

The ZelenTech ZT-100 Water Cut Meters are built to strict standards.

Ability to accomodate a vast variety of Piping Specifications ensures that the meter becomes an integral part of the piping system and not a weak link. ZelenTech’s ISO9001 quality system is able to accomodate any customer requirements for documentation, material traceability and quality assurance.

Flow Conditioning

The ZT-100 Water Cut Meter can be supplied with built in Static Mixer providing a well conditioned stream both for inline measurement and sampling. Designed in accordance with standards such as API 8.2 and ISO 3171.


The ZelenTech ZT-100 Water Cut Meter is designed around reliable capacitance technology. We have added decades of knowledge and experience to overcome problems normally associated with capacitance probes. The ZT-100’s built in logic will compensate for the vast temperature effects in the dielectric constant of the water while recognising the much smaller effects on the dielectric constant of the oil. The ZT-100 is a loop powered Intrinsic Safe device with HART Interface. All setup can be done from a remote location using a dedicated PC interface.


Installation in bypass/fast loops or direct inline measurement from 1 inch to 48 inch 0-25% Low Range or Full Cut 0-100% Intrinsic Safe or Explosion Proof Standard or customized


Stream conditioning is the key to high accuracy water cut metering. The effects of an unconditioned 2-phase stream renders the reading of any high accuracy meter very questionable. The stream through the sensor, be it direct or via a by-pass, must be representative of the full flow. Our engineers will take a look at your complete setup and provide advice and guidance so that the sensor will get a representative flow.

The ZT100, correctly installed with proper stream conditioning, can be expected to achieve the following accuracy:

  • ± 0.01% up to 5% water cut
  • ± 0.1% up to 5% and 10% water cut
  • ± 0.2% between 10% and 25% water cut
  • ± 0.5% between 25% and 50% water cut
  • ± 1% between 50% and 100% water cut

Lab Correlation

Close correlation between lab and an online meter, no matter the working principles of the meter, can only be achieved once the stream is properly conditioned and the comparing sample is taken at the same spot. Requirements of standards such as ISO3171 or API 8.2 must be followed to achieve correlation.

Customized Solutions

Our specialty is to provide complete solutions where we do not only provide you with a sensor, but also make sure that the sensor receives a representative stream. We can supply full bore spool pieces designed to have the sensor on a by-pass or directly inline.

Let us tell you more about how we can improve your results!


New advanced proprietary Temperature Compensation Algorithm provided for new units. No more 2 point temp factor needed, the ZT-100 will temperature compensate automatically. Simply select your oil type in the ZelenTech ZT-100 Interface Software (HART or RS-232) and temperature compensation will work over the full temperature range, no matter the water content.