Photoelectrics
Level Sensors
Type VP, Unmodulated
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Sensor for liquid level detection
Built-in amplifier, Ga-As diode
Output: Transistor NPN/PNP or SCR, NO or NC
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
• DC types: LED-indication for output ON
• Power supply: DC types: 10 to 40 VDC
AC types: 110 or 230 VAC
Product Description
Optical level sensor with
unmodulated, infrared light
for the detection of liquids.
Fitted with built-in amplifier.
Transmitter and receiver
are completely self-con-
tained in solid plastic housing
designed for mounting into
container wall. VP01/02 are
available in a Polysulphone
housing resistant to most
acids and bases. VP03/04
are available in a Polyamide
12 housing resistant to vari-
ous solvents.
Ordering Key
Type
Housing
Output status
Output type
PNP output
VP 0 3 E P
Type Selection - DC Types
Housing material
Ordering no.
Transistor NPN
Make switching
VP 02 E
VP 04 E
Ordering no.
Transistor NPN
Break switching
VP 01 E
VP 03 E
Ordering no.
Transistor PNP
Make switching
VP 02 EP
VP 04 EP
Ordering no.
Transistor PNP
Break switching
VP 01 EP
VP 03 EP
Polysulphone
Polyamide 12
Type Selection - AC Types
Housing material
Ordering no.
Make switching
110 VAC
VP 02-110TB
Ordering no.
Break switching
110 VAC
VP 01-110TB
Ordering no.
Make switching
230 VAC
VP 02-230TB
Ordering no.
Break switching
230 VAC
VP 01-230TB
Polysulphone
Specifications
Transistor NPN/PNP
Rated operational voltage
Rated operational current
Continuous
Voltage drop
No-load supply current
Sensing accuracy
Liquid level difference
Ambient light
Frequency of operating cycles
(f)
10 - 40 VDC
200 mA
≤ 1.0 VDC
≤ 12 mA
Horizontal mounting: ± 5 mm
Vertical mounting: ± 2.5 mm
0 - 100 lux
30 Hz
SCR output AC types
110 VAC: 100 - 121 VAC, 45 - 60 Hz
230 VAC: 195 - 265 VAC, 45 - 60 Hz
10 - 100 mA
≤ 9.0 VAC
≤ 7 mA
Horizontal mounting: ± 5 mm
Vertical mounting: ± 2.5 mm
0 - 100 lux
5 Hz
Specifications are subject to change without notice (08.05.2017)
1
VP, unmodulated
Specifications (cont.)
Environment
Degree of protection
Operating temperature
Storage temperature
Indication for output status
Housing and tip material
VP01/02
VP03/04
Weight
Connection
Pressure
Pipe thread
CE-marking
Transistor NPN/PNP
IP 67
-20° to +80°C (-4° to +176°F)
-40° to +100°C (-40° to + 212°F)
LED, yellow
Polysulphone
Polyamide 12
90 g
Cable (PVC), 2 m
Ø4,1 mm, 3 x 0,25 mm2
10 bar at + 60ºC
3/8” PT
Yes
SCR output AC types
IP 67
-20° to +80°C (-4° to +176°F)
-40° to +100°C (-40° to + 212°F)
Polysulphone
90 g
Cable (PVC), 2 m
Ø5,2 mm, 2 x 0,5 mm2
10 bar at + 60ºC
3/8” PT
Yes
Mode of Operation
The sensor contains IR trans-
mitter, receiver and amplifier
with transistor or SCR output.
The light source is a Ga-As
diode emitting infrared light.
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, provided that the tip
of the sensor is situated in
free air. If the sensor tip is
immersed in a liquid, always
having a refractive index dif-
ferent from air, the beam will
not be refracted by the prism
and the photo transistor will
not receive any signal.
The sensor types can operate
in oil, waste water, aqueous
solutions such as beer, wine,
alcohol etc. without any kind
of accessory.
Wiring Diagrams
BN
BK
BU
BK
Dimensions
BU
BN
VP01E, VP03E
BN
BK
BU
VP01EP, VP03EP
BU
BK
BN
Pipe thread ISO 228/1-G 3/8”
VP02E, VP04E
VP02EP, VP04EP
BN
BN
DC types
A mm
B mm
Ø 6.0
Ø 4.1
AC types
Ø 6.7
Ø 5.2
BU
BU
VP01-...TB
VP02-...TB
* DC types
Specifications are subject to change without notice (08.05.2017)
2
A
*
B
VP, unmodulated
Installation Hints
To avoid interference from inductive voltage/
current peaks, separate the prox. switch
power cables from any other power cables,
e.g. motor, contactor or solenoid cables
Relief of cable strain
Protection of the sensing face
Switch mounted on mobile carrier
Incorrect
Correct
The cable should not be pulled
A proximity switch should not serve as
mechanical stop
Any repetitive flexing of the
cable should be avoided
Specifications are subject to change without notice (08.05.2017)
3
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