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 Ordering Key VP 0 2 E P M Optical level sensor with er wall. VP01/02 are avail- Type modulated, infrared light able in a Polysulfone hous- Housing for the detection of liquids. ing resistant to most acids Output status Fitted with built-in amplifier. and bases. VP03 /04EM are Output type Trans mitter and receiver are available in a Polyamide 12 PNP output completely selfcontained housing resistant to various Modulated in solid plastic designed solvents. for mounting into contain- 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 Housing material VP01/02 Polysulphone Rated operational current VP03/04 Polyamide 12 Continuous 200 mA Tip material Voltage drop 1.0 VDC VP01/02 Polysulphone No-load supply current 7 mA VP03/04 Polyamide 12 Sensing accuracy Weight 90 g Liquid level difference Horizontal mounting: 5 mm Connection Vertical mounting: 2.5 mm Cable PVC, 2 m Ambient light 0 - 50.000 lux 2 4.1 mm, 3 x 0,25 mm Frequency of Pressure operating cycles (f) 30 Hz VP0x 10 bar at + 60C Environment Pipe thread 3/8 PT Degree of protection IP 67 CE marking Yes Operating temperature -20 to +80C (-4 to +176F) Storage temperature -40 to +100C (-40 to +100F) Indication for output status LED, yellow Specifications are subject to change without notice (06.11.2014) 1 VP, modulated Dimensions Mode of Operation The sensor contains IR trans- provided that the tip of the mitter, receiver and amplifier sensor is situated in free air. with transistor output. The If the sensor tip is immersed light source is a Ga-As diode in a liquid, always having a emitting infrared light in short refractive index different pulses. from air, the beam will not be The conical tip of the sensor refracted by the prism and forms an angle of 90C. This the photo transistor will not Pipe thread ISO 228/1-G 3/8 angle acts as a prism, i.e. receive any signal. the beam, emitted from the The sensor types can operate Ga-As diode placed in one in oil, waste water, aqueous side of the sensor head, is solutions such as beer, wine, Wiring Diagrams reflected internally to the alcohol etc. without any kind phototransistor placed in the of accessory. other side of the sensor head, BN BN BK BK BU BU VP02/04 EM VP01/03 EM BU BU BK BK BN BN VP02/04 EPM VP01/03 EPM Installation Hints To avoid interference from inductive voltage/ Relief of cable strain Protection of the sensing face Switch mounted on mobile carrier current peaks, separate the prox. switch power cables from any other power cables, e.g. motor, contactor or solenoid cables Incorrect Correct The cable should not be pulled A proximity switch should not serve as Any repetitive flexing of the cable should be avoided mechanical stop 2 Specifications are subject to change without notice (06.11.2014)