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Capacitive Sensor Drivers
Elite Series: CPL490
Very High Resolution, High Bandwidth
with 2nd Generation Probe

Extremely high-resolution, high-speed capacitive sensors for ultimate precision.

Ultra Precise, Very High-Speed Measurements

Convenient Output Interface and Range Selections

Versatile, Useful Features

Life-Cycle Status: Active

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Specifications

Typical specifications. Resolution and linearity depend on probe, range, and bandwidth. See Probes and Ranges for details.

Resolution @15 kHz, Typical*

0.0007% F.S. rms

Bandwidths (kHz, -3dB) (PCB Dip-Switch)

50, 15, 10, 1

Linearity

0.2%F.S.

Error Band

0.3%F.S.

Maximum Drift, Typical*

0.04%F.S./°C

BNC Output Voltage

±10 V

BNC Output Impedance

0 ohms, 15 mA max

Rear Panel National Instruments Interface Connector Output Voltage

Differential ±10 V

Operating Temperature

15-40 °C

Multiple Channel Operation

Up to 3 Channels
Contact us if more are needed

*Probe/Range dependent, see Range/Resolution table below

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CPL490 Ranges/Resolutions - Probe Dependent

Get Expert Help

Larger Sensing Area = Larger Range

Target: Flat, Surface Diameter > 130% Sensing Area Diameter
or custom calibration required

1 mil = 0.001"

probe-sensor cal Noise image   CPL490 uses 2nd Generation Probes

Sensing Area
Diameter

mm
(Probe Model)

Measurement Range

Resolution* @ Bandwidth

Maximum
Drift of
Probe

% F.S./°C

2nd Generation Probe

Range
Type

Range
µm
mils

Near Gap
µm
mils

1 kHz
nm
µin
10 kHz
nm
µin
15 kHz
nm
µin
50 kHz
nm
µin
0.5
(2G-C8-0.5)
Fine 10
0.4
20
0.8
0.05
0.002
0.07
0.003
0.09
0.004
0.26
0.010
0.04

Standard 50
2.0
25
1.0
0.17
0.007
0.27
0.011
0.35
0.14
1.0
0.40
0.02
1.2
(2G-C8-1.2)
Standard 100
4.0
50
2.0
0.33
0.13
0.40
0.16
0.52
0.21
1.7**
0.65
0.02

* 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 0.5 VRMS (2.5% resolution)
Custom calibrations can achieve exceptional resolution performance
** Maximum bandwidth for this calibration is 40 kHz

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