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ZT100 S-Series

The iso-kinetic S-Series provides reliable water content metering in all small pipe applications. The ZT-100 S-Series of Watercut Meters can be installed inline or in bypass. Built to any piping spec in the materials of your choice. For larger pipes also check out the F-Series and the new I-Series of water cut meters.

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 continuously monitored for capacitance and converted into percentage of water by the Watercut Monitor logic.

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.

ZT-100 S-Series

ZelenTech ZT-100 Watercut Meters (BS & W, OWM)


  • Automatic Temp Comp
  • Optional Density Comp
  • HART + Modbus available
  • PC Interface



S-Series Specifications

Response time1 sec
Output4-20mA + HART
Power Supply24VDC (Loop Powered)
Power Consumption0.66W Max
Temperature (Media)+150° C (250 with High Temp Option)
Temperature (Ambient)+60° C
Ingress ProtectionIP66
Measurement Range0-25% or 0-100%
Nominal Sizes1 to 6 inch or DN25 to DN200
Material (Standard)316L
Seals and electrical insulatorsPEEK

S-Series General Data

Principle of OperationHigh Frequency Digital Capacitance
Resolution (Low Range)0.001%
Accuracy (Low Range)0.01%
Resolution (High Range)0.05%
Accuracy (High Range)0.05%
Repeatability0.01% Absolute
Max Water (Low Range)25%
Max Water (High Range)100%
Temp Compensation Range>0°C – 180°C

S-Series Mechanical Data

Wetted Steel Material316L Standard (More exotic materials available)
Max. Working PressureUp to Class 1500#
Max. Fluid Temperature180°C Standard (240°C Optional)
Max. Ambient Temperature65°C
Process ConnectionANSI, DIN, JIS

The ZT-100 is available with a variety of certifications to suit different locations


EXD Class 1, Division 1


II 2 GD Ex d IIC T6÷T4 - Ex tD A21 IP 66/67 T85°C ÷ T135°C


Certified GOST EXD (Russia)

S-Series Configurations and Features

Threaded or Flanged Models:

  • Slip-On Flanges or Weld Neck Flanges.
  • ANSI, DIN or JIS Flanges
  • Flange sizes from 1 inch to 8 inch
  • Threaded sizes from 1 inch to 3 inch

Measurement Ranges:

  • Low Range 0-25%
  • Mid Range 0-65%
  • High Range 0-100%

Design Features:

  • Isokinetic Inline Sensor
  • 2-wire Loop powered
  • Temperature Compensation
  • Optional Density Compensation

Integrated Static Mixer

The ZelenTech ZT-100 S-Series can optionally be fitted with an integrated Static Mixer (SM-Series). The mixer will ensure that a well mixed and homogenized stream will reach the sensor. We configure mixer elements and spacing in accordance with standards such as ISO 3171 and API MPMS8.2 to ensure that the sensor will see a truly representative view of what is going on in your pipes.