PS-Ⅲ | UNIPULSE

Product outline

The PS sensor is an ultra-precision displacement sensor with high stability and high resolution, applying our unique capacitance technology. It has earned a good reputation as a displacement sensor with great versatility and price, being used for measuring various parameters such as displacement, vibration, shape, and position.
Also, considering global environment, those products are Pb-free and conforms to RoHS standard.
PS-Ⅲseries is the definitive version of PS sensor series, having various functions. Suitable not only as a laboratory tool for R&D but also as a built-in component for devices.

Principle of measurement

As shown in the figure below, the principle of parallel plate capacitor is applied to the PS sensor. Suppose the electrostatic capacitance between the center electrode and the target is “C”, the inductivity and distance between probe and the target are “ε” and “g,” and center electrode surface area is “A”, then, electrostatic capacitance can be calculated by the following formula:

In addition, by using constant current power supply as shown in the figure, output voltage, calculated by the following formula, will be relative to the distance between the sensor and the target object:

To achieve high linearity, parallel electric field is obtained at the center of electrode by equalizing the electric potential level of guard electrode and the center electrode.

Applications

Specifications

Amplifier specifications｜Standard probe｜External Dimension｜PS-Ⅲ Order number

The PS-Ⅲ is equipped with various features like one-touch zero reset function, NEAR/FAR LED display, and multichannel operability, and it can be used for wide variety of applications.

Amplifier specifications
Model	PS-Ⅲ
Standard range of voltage output	0 to 10 V
Output terminal	BNC connector
Frequency characteristic	DC to 1 kHz
Operating temperature range	10 to 40℃
Operating voltage	AC 100 V (with supplied AC adapter)

“□□” in the chart will be filled with probe length (mm)

Model	Outer diameter (mm)	Offset (μm)	Range (μm)	Resolution (nmrms)	Linearity (%)	Probe length (mm)	Cable length (m)
AX□□-30	4	10	30	0.6	±0.05	5 10 30	2 (standard)
AX□□-50		10	50	1.0
AX□□-100		10	100	2.0
AY□□-50	6	10	50	1.0
AY□□-100		10	100	2.0
AY□□-250		25	250	5.0
AY□□-500		50	500	10	±0.1
AZ□□-500	12	50	500	10	±0.05	10 30
AZ□□-1000	12	100	1000	20	±0.1	10 30

Order number example

External Dimension
Model	PS-Ⅲ-3N	PS-Ⅲ-2D	PS-Ⅲ-5N	PS-Ⅲ-4D
Output terminal	BNC×3	BNC×2	BNC×5	BNC×4
Dimensions(mm)	186W×152H×331D		257W×152H×271D
Indicator	No	Yes	No	Yes

Amplifier model		Number of channels	Indicator
PS-Ⅲ ordering number
PS-Ⅲ		2 or more	With indicator・・・D
PS-Ⅲ		2 or more	Without indicator・・・N
In case 4 channel indicator is required
In case 4 channel indicator is required
PS-Ⅲ	–	4	D

Xin lưu ý rằng có thể có những khác biệt riêng về tông màu trên các thiết bị hiển thị như đèn LED, ống màn hình huỳnh quang và các màn hình LCD do quá trình sản xuất hoặc lô sản xuất khác nhau.