Capacitive Sensors

Capacitive Sensor:
CPA100 and CPA100e Precision Analog Proximity Switch

Lower cost capacitive displacement sensor with adjustable Gain and Zero and setpoint switch output.

Life-Cycle Status: Active

Because of high resolutions, exports of the CPA100 may require an export license.

CPA100e

The CPA100e has different resolution specifications and can ship without export license delays.

Typical specifications. Actual values depend on probe and calibration.

Resolution @ mid-range @ 15 kHz (Typical)	CPA100: 0.03%F.S. RMS CPA100e: 0.3 µm RMS or higher Details on Probes and Ranges
Bandwidth	15 kHz (-3dB)
Linearity	Nonlinear (see chart below)
Maximum Drift	Driver: 0.2% F.S./°C Probe: 0.05% F.S./°C
Analog Output	0-10 VDC, 0 ohms, 15 mA max
Setpoint Output	Solid state switch closure: 30 VAC/60 VDC max On state: 2.5 Ω, 100mA max Off state leakage: 10µA max
Output Impedance	0 ohms
Operating Temperature	40°F-120°F 4°C-50°C
Input Power	15-24 VDC, 2.5 W

Larger Sensing Area = Larger Range

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

Probes can be ordered as vacuum compatible. custom probes are available.

45 degree probe 45 degree probe small coin probe right angle probe goldPlatePuck

probe-sensor

1 mil = 0.001"

Standard Probes		Calibration Type
Sensing Area Diameter mm	Body Styles Click model for probe shape/size options	Standard				Extended
Sensing Area Diameter mm	Body Styles Click model for probe shape/size options	Range µm mils	Near Gap µm mils	CPA100 Resolution* nm µinch	CPA100e Resolution* nm µinch	Range µm mils	Near Gap µm mils	CPA100 Resolution* nm µinch	CPA100e Resolution* nm µinch
0.5		50 2.0	50 2.0	55 2.5	400 16	80** 3.0	60 2.5	100 4.0	400 16
0.8		100 4.0	100 4.0	55 2.5	400 16	—	—	—	—
2.0		250 10.0	125 5.0	50 2.0	400 16	500 20.0	125 5.0	55 2.5	400 16
3.2		500 20.0	250 10.0	85 3.5	400 16	1250 50.0	250 10.0	125 5.0	400 16
5.6		500 20.0	500 20.0	140 5.5	400 16	2000 80.0	250 10.0	170 7.0	400 16
13		3200 125	2000 80	1000 40	1000 40	5000 200	3000 120	1600 63	1600 63
19		2500 100.0	5000 200	1400 55	1400 55	6000 250.0	3000 120	1100 43	1100 43
21		8000 300	5000 20	1200 47	1200 47	12500 500	5000 20	1600 63	1600 63