Noncontact Sheet Resistance Instrumentation

20J3 Inline Sheet Resistance Meter

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multiple eddy current sensors measure Ohms/sq inline, in real time, and without contact eddy current sensor measuring sheet resistance of a thin film in a vacuum coater Optional PCs for use in monitoring atmosphere or vacuum coating in real time inline software to record sheet resistance of web of material in real time

Inline Noncontact Eddy Current Sheet Resistance Meter for Thin Materials

  • Least expensive option for inline process control
  • Great for monitoring cross-web and down-web consistency
  • Works in vacuum or atmosphere, wet or dry processes
  • Narrow and short profile allows for mounting in the most needed location
  • Noncontact measurement of ohms/square, ohms-cm, resistivity, thickness, and more
  • Choose sensors in one of four ranges from .005 ohms/square to 100,000 ohms/square
  • Add additional sensors later to measure additional points or to widen the range
  • Real-time monitoring of moving materials via PC or LAN

Four Ranges to Choose From

Up to five significant digits available, depending on instrument range.

Instrument Range Dynamic Range in Ohms/square Significant Digits Available at Each Order of Magnitude
Low End High End 10k 1k 100 10 1 .1 .01 .001
×10 5 100,000 1 2 3 4 5
×1 .5 10,000 1 2 3 4 5
÷10 .05 1,000 1 2 3 4 5
÷100 .005 100 1 2 3 4 5
Instrument response rate: 40 ms
Display response rate: 300 ms
Max web speed: 1000 m/min
Reading drift with temperature: No more than .04% of total resolution per degree Celsius per hour
Gap size: 3 mm
Minimum sample size: 3 cm diameter circle
Spatial resolution: 3 cm diameter circle
Maximum sample thickness: 1.5 mm
Reach in web: 20 cm
Maximum web width (while reading entire sample): 40 cm
  • Anti-static/conductive films
  • Antennas
  • Auto
  • Batteries
  • Decorative films/paper
  • Displays
  • Flex circuitry and flexible circuit boards
  • Galvanic coatings
  • Glass windows
  • Metalized capacitor foil
  • Metalized labels
  • Microwave susceptors
  • Packaging
  • Radar absorbent materials
  • Reflectors and reflective materials
  • Semiconductors
  • Solar
  • Transparent conducting film

Options and upgrades

All options and upgrades are available for purchase with the original unit and for at least one year after purchase.

  • Additional sensors:

    The 873 Interface Module can accommodate up to 12 sensors. A user may want to purchase additional sensors in order to increase the range of the entire system or to take measurements at two or more physical locations.

  • Vacuum-ready package:

    The sensor is vacuum ready; however, vacuum-ready cabling, brackets, and feedthrough(s) will be required for vacuum applications.

  • Optional computer:

    Delcom can source a laptop, desktop, tablet, or industrial touchpanel PC for customers, if needed.