VP01EM

## **Photoelectrics Level Sensors Types VP, Modulated** 

- **Sensor for liquid level detection** 

- **Built-in amplifier, Ga-As diode** 

- **Output: Transistor NPN/PNP, NO or NC switching** 

- **High chemical resistance to most acids and bases** 

- **VP01/03: Output OFF when sensor in liquid** 

- **VP02/04: Output ON when sensor in liquid** 

- **No electrical or thermal connection between liquid and electrical circuit** 

- **LED-indication for output ON** 

- **Power supply 10 to 40 VDC** 

## **Product Description** 

Optical level sensor with modulated,  infrared light for the detection of liquids. Fitted with built-in amplifier. Trans mitter and receiver are completely selfcontained in solid plastic designed for mounting into contain- 

er wall. VP01/02 are available in a Polysulfone housing resistant to most acids and bases.  VP03 /04EM are available in a Polyamide 12 housing resistant to various solvents. 

**Ordering Key VP 0 2 E P M** 

**Type Housing Output status Output type PNP output Modulated** 

## **Type Selection** 

|**Housing**|**Connection**|**Ordering no.**|**Ordering no.**|**Ordering no.**|**Ordering no.**|
|---|---|---|---|---|---|
|**material**||**Transistor NPN**|**Transistor NPN**|**Transistor PNP**|**Transistor PNP**|
|||**Make switching**|**Break switching**|**Make switching**|**Break switching**|
|Polysulphone|Cable|**VP 02 EM**|**VP 01 EM**|**VP 02 EPM**|**VP 01 EPM**|
|Polyamide 12|Cable|**VP 04 EM**|**VP 03 EM**|**VP 04 EPM**|**VP 03 EPM**|



## **Specifications** 

|**Rated operational voltage**|10 - 40 VDC|
|---|---|
|**Rated operational current**<br>Continuous|200 mA|
|**Voltage drop**<br>**No-load supply current**|≤ 1.0 VDC<br>≤ 7 mA|
|**Sensing accuracy**<br>Liquid level difference<br>**Ambient light**|Horizontal mounting: ± 5 mm<br>Vertical mounting: ± 2.5 mm<br>0 - 50.000 lux|
|**Frequency of**<br>**operating cycles**(f)|30 Hz|
|**Environment**<br>Degree of protection<br>Operating temperature|IP 67<br>-20° to +80ºC (-4° to +176ºF)|
|Storage temperature|-40° to +100ºC(-40° to +100ºF)|
|**Indication for output status**|LED, yellow|



|**Housing material**||
|---|---|
|VP01/02|Polysulphone|
|VP03/04|Polyamide 12|
|**Tip material**||
|VP01/02|Polysulphone|
|VP03/04|Polyamide 12|
|**Weight**|90g|
|**Connection**||
|Cable|PVC, 2 m|
||Ø4.1 mm,3 x 0,25 mm2|
|**Pressure**||
|VP0x|10 bar at + 60ºC|
|**Pipe thread**|3/8” PT|
|**CE marking**|Yes|



**1** 

Specifications are subject to change without notice (06.11.2014) 

**VP, modulated** 

## **Dimensions** 

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Pipe thread ISO 228/1-G 3/8”<br>**----- End of picture text -----**<br>


## **Wiring Diagrams** 

## **Mode of Operation** 

provided that the tip of the sensor is si tuated in free air. If the sensor tip is immersed in a liquid, always having a refractive index different from air, the beam will not be refracted by the prism and the photo transistor will not receive any signal. 

The sensor contains IR transmitter, receiver and amplifier with transistor output. The light source is a Ga-As diode emitting infrared light in short pulses. 

The conical tip of the sensor forms an angle of 90ºC. This angle acts as a prism, i.e. the beam, emitted from the Ga-As diode placed in one side of the sensor head, is reflected internally to the phototransistor placed in the other side of the sensor head, 

The sensor types can operate in oil, waste water, aqueous solutions such as beer, wine, alcohol etc. without any kind of accessory. 

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BN 3 BN<br>BK<br>BK<br>* BU 7 ao BU ~<br>VP02/04 EM  VP01/03 EM<br>BU - BU _<br>K> Kp BK<br>BK<br>BN * BN +<br>VP02/04 EPM  VP01/03 EPM<br>**----- End of picture text -----**<br>


## **Installation Hints** 

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To avoid interference from inductive voltage/  Relief of cable strain Protection of the sensing face  Switch mounted on mobile carrier<br>current peaks, separate the prox. switch<br>power cables from any other power cables,<br>e.g. motor, contactor or solenoid cables<br>Incorrect<br>—<br>N<br>{ SS<br>Correct<br>The cable should not be pulled A proximity switch should not serve as  Any repetitive flexing of the<br>mechanical stop cable should be avoided<br>**----- End of picture text -----**<br>


**2** 

Specifications are subject to change without notice (06.11.2014)