CAPACITIVE SENSORS - Lion Precision

1 Lion Precision Established 1958 ISO 9001:2008 St. Paul, MN USAP recise Noncontact SENSORS and Experts to Help You Use ThemCAPACITIVE SENSORSP osition Displacement High Speed High ResolutionOff-The-Shelf and Customized SolutionsLion Precision 563 Shoreview Park Road St. Paul, MN 55126 USA 800-229-6544 651-484-6544 CAPACITIVE SensorsDriverExcitation voltage (AC)Signal processingCalibrationOutput voltage/dataElite Series (CPL490, CPL190/290) Best performance; adjustments and indicators CPL230, CPL350 No user adjustments or indicators CPA100 Precision Analog Proximity Adjustable gain and zero, Indicators Setpoint outputRange Dependent on Sensing AreaMounting Cylindrical: 3 mm, 5 mm, 8 mm, 3/8 18 mm Rectangular: 20 mm, 45 mmProbeElectric Field (AC)TargetDriver SelectionsProbeSelections2 BasicsWhen two conductive surfaces are near each other, there is an electrical property called capacitance that exists between them.

2 The amount of capacitance depends on the distance and material between the two conductors. A CAPACITIVE sensor uses an electric field to measure changes of capacitance between the probe surface and a conductive target TargetsIf the material between the two conductive surfaces remains constant, any change in capacitance is due to a change in the distance between them. CAPACITIVE SENSORS are calibrated to produce a repeatable output for a given change in distance between the probe and the target. This technique works over small ranges (10 m - 12 mm) with resolutions as low as nm. Nonconductive TargetsCapacitance also depends on the material between the probe and a conductive target surface. If the distance between the probe and a target surface is fixed, CAPACITIVE SENSORS can measure changes in the material between them. This technique is traditionally used to detect changes in thickness, density, or volume of material, but could also detect changes in material AccuracyAccuracy at the high resolutions of CAPACITIVE SENSORS may be greatly affected by the environment and measurement setup.

3 Probes must be positioned in a stable mechanical system in a stable environment. Even small changes in temperature cause expansions of the target that are detectable by high-resolution CAPACITIVE SENSORS . These are not sensing errors; the displacements are is a measurement system s smallest possible measurement. Resolution is essentially a measurement of electrical noise present at the sensor output. CAPACITIVE sensor resolution is a function of the bandwidth of the system. The lower the bandwidth, the better the resolution. When comparing specifications, be sure you know the bandwidth at which the resolution is the complete CAPACITIVE sensor tutorial TechNote and a detailed article on sensor resolution at: ; click on Technical SensorsA CAPACITIVE sensor SystemCapacitive Series (page 5)Typical specifications.*Dependent on probe and rangeCPL490page 6 CPL190/290page 8 CPL230page 12 CPL350page 14 CPA100page 16 Typical Resolution* (% rms) @ 15 @ midrangeNonlinearity* Range (Sensitivity)CPL290 User Adjustments Adjustable Gain Adjustable Offset Range Indicator Setpoint/Switched Output Channels per Package1-31-81-611 Selectable Bandwidth (internal dip-switch)1, 10, 15, 50 , 1, 10, 15 , 1, 10, 15 , 1, 10, 15 kHzMaximum Bandwidth50 kHz15 kHz15 kHz15 kHz15 kHzCustomization Available Driver ComparisonOptionsSpecifications listed on the following pages are for probes with standard 2 meter cables.

4 Listed specifications do not apply when customization is included. Performance of customized product will depend on specific Vacuum Compatibility (to 10-6 Torr); Probe High-Vacuum Compatibility (below 10-6 Torr)Options requiring custom calibration and deviation from listed specifications:Custom Ranges Nonflat or Undersized Target Shape Custom Cable LengthProbe Extension Cables (2 m, 3 m, 4 m; must be calibrated and used with extension cable attached)AccessoriesDIN Rail Power Supply CPA100In:100-240 VAC 50-60 Hz Out:10 to 15 VDC @2 AProbe Adapters for fitting 3, 5, and 8 mm diameter probes into 3/8" Power SupplyElite Series 1-, 2-, 3-Slot Enclosures;CPL230; CPL350In:100-240 VAC 50-60 Hz Out: 15 VDC ALion Precision 563 Shoreview Park Road St. Paul, MN 55126 USA 800-229-6544 651-484-6544 CAPACITIVE Sensors4 More than half of our orders are customized in some enclosures. Custom probe shapes. Technology calibration ranges. Vacuum compatible probes.

5 Complete Technical Detail Lion Precision website provides a high level of technical detail about our products and CAPACITIVE sensing in general. Our CAPACITIVE Sensing Theory of Operation TechNote is viewed thousands of times a month. The TechNote enables you to better understand the sensing technology, what pitfalls to avoid, and how to maximize the effectiveness of your website provides other detailed TechNotes with insight into the specific operation of our SENSORS and answers your questions about an entire range of of the product manuals are available from the website as well as information about the company, its history, vision, and way of doing sensor Design Custom probes and electronics for your specific applicationCapacitive Enclosures Enclosures provide power and drive signals. Extra slots can be included for future expansion. Direct connect to National Instruments DAQ hardware Input power: 100-240 VAC 50/60 Hz 1-, 2-, 3-, 6-, 8-slot Options Mounting flanges on 1-, 2-, and 3-slot Tip-up handle on 6- and 8-slot Elite SeriesOur Top Performing CAPACITIVE sensor SystemElite Series SENSORS combine high performance, easy DAQ interface, and the flexibility of custom configurations.

6 1-8 SENSORS in a single system Rear-panel 68-pin connector configured for National Instruments DAQ devices Support modules available: Temperature SENSORS , Signal Processing/DisplayExport LicenseBecause of high resolutions, export of the Elite Series to some countries requires an export license. 1-, 2-, and 3-slot enclosures include an external power 6- and 8-slot enclosure includes internal power supply and standard IEC line-power Series ModulesLion Precision 563 Shoreview Park Road St. Paul, MN 55126 USA 800-229-6544 651-484-6544 CAPACITIVE Sensors6 Elite Series sensor Modules Elite SeriesCPL490 Picometer sensor ModuleHighest resolution, widest bandwidth availableRanges/Probes Table (Next Page)Range is determined by the probe Sensing Area diameter. The larger the diameter, the larger the CPL490 uses 2nd Generation Probes. Ranges and performance specifications are on the next specifications assume a 2 meter probe cable; flat measurement area diameter at least times larger than the Sensing Area diameter; and no customizations.

7 Highest resolution Widest bandwidth (50 kHz) Five-element range indicator Zero adjust Zero adjust disable Front-panel BNC analog output Differential output to National Instruments 68-pin connector Uses 2nd Generation ProbesSpecificationsResolution1: @1 kHz @ 15 kHz @ 50 kHzBandwidth: Selectable: 1, 10, 15, 50 kHzLinearity: < Drift2: CFront-Panel BNC: 10 V, 0 , 10 mA max National Inst. Rear Conn.: 10 V, 0 , Differential Operating Temp: 15-40 CMultiple SENSORS : Up to 3 Contact Lion Precision for more than 31 Dependent on probe, range, and bandwidth. See next page for details. 2 Dependent on probe and range. See next page for LicenseBecause of high resolutions, export of the Elite Series to some countries requires an export license. Sensing AreaCapacitive Series sensor Modules Elite Series2nd Generation ProbesProbes for use with the CPL490 CAPACITIVE sensor ModulesCPL490 Measurement Ranges/ResolutionsThe CPL490 uses 2nd Generation CAPACITIVE Probes which include electronics in the probe housing.

8 The probes are mounted by the 8 mm diameter probe body extending from the larger housing. Two models are available differing only in the sensing area diameter and associated measurement : mm sensing area : mm sensing areaRange is determined by the sensing area diameter. The larger the diameter, the larger the target surface must be times larger than the sensing area diameter. mmSensing mmSensing AreaHeat ShrinkStrain ReliefSensing AreaTARGETNEAR GAPRANGETARGETS ensing Area Diametermm(Probe Model)Measurement RangeResolution1 @ BandwidthProbe Maximum Drift% CRange TypeRange m milsNear Gap m mils1 kHznm in10 kHznm in15 kHznm in50 kHznm ( )Fine10 ( )Fine50 values are RMS. Peak-to-peak values are typically 8-10 times greater than the RMS values. In high EMI conditions (10 V/m) output DC level may shift and noise may rise to VRMS ( resolution).Standard Cable2 m 25 mmLion Precision 563 Shoreview Park Road St.

9 Paul, MN 55126 USA 800-229-6544 651-484-6544 CAPACITIVE Sensors8 Elite Series sensor Modules Elite SeriesCPL190 CPL290 Sub-Nanometer sensor Modules Single Range Dual RangeThe CPL190 has one range (sensitivity); the CPL290 has two Table (Next Page)The CPL190/CPL290 uses Standard Probes. Standard Probe ranges and performance specifications are on the next page. Range is determined by the probe Sensing Area diameter. The larger the diameter, the larger the specifications assume a 2 meter probe cable; flat measurement area diameter at least times larger than the Sensing Area diameter; and no customizations. Standard Probe mechanical details are on page probe body styles/sizes are available for each Sensing Area. High resolution Five-element range indicator Coarse/Fine zero adjusts Zero adjust disable Front-panel BNC analog output Differential output to National Instruments 68-pin connectorSpecificationsResolution1: @100 Hz @ 15 kHzBandwidth: Selectable: 100 Hz, 1, 10, 15 kHzLinearity2: < typicalMax Drift: COperating Temp: 4-50 CFront-Panel BNC: 10 V, 0 , 10 mA max National Inst.

10 Rear Conn.: 10 V, 0 , Differential 1 Dependent on probe, range, and bandwidth. See next page for details. 2 Dependent on probe and range. See next page for LicenseBecause of high resolutions, export of the Elite Series to some countries requires an export license. Sensing AreaCapacitive Series sensor Modules Elite Series1 Resolution values are RMS. Peak-to-peak values are typically 8-10 times greater than the RMS values. In high EMI conditions (10 V/m) output DC level may shift and noise may rise to VRMS (1% resolution).Sensing AreaTARGETNEAR GAPRANGETARGETC5 SShapeC = CylindricalR = RectangularSize in mmC: DiameterR: Longest SideBody StyleBlank = LongS = ShortR = Right AngleSensing Area DiametermmMeasurement RangeResolution1 @ BandwidthLinearity% Body SizesRange TypeRange m milsNear Gap m mils100 Hznm in1 kHznm in10 kHznm in15 kHznm inModelsBody 1010 802000 8020 1252000 8030 2003000 12075 1005000 20050 2503000 12090 3005000 20075 5005000 200130 Probes and Ranges for use with the CPL190 and CPL290 CAPACITIVE sensor ModulesLion Precision 563 Shoreview Park Road St.