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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
0.014
1.0
0.040
0.02
Extended 100
4.0
50
2.0
0.38
0.015
0.80
0.031
1.0
0.039
3.3
0.14
0.03
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

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