Specifications are subject to change without notice (02.10.02) 1
• Modulated infrared sensor for liquid
level detection
• Built-in amplifier, Ga-As diode
• Output: Transistor NPN/PNP, make or break
switching
• High chemical resistance to most acids and bases
• VP01/03/23: Output OFF when sensor in liquid
• VP02/04/24: 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
Type
Housing
Output status
Output type
PNP output
Modulated
Connection
Photoelectrics
Product Description
Optical level sensor with
modulated, infrared light for
the detection of liquids.
Fitted with built-in amplifier.
Transmitter and receiver are
completely selfcontained in
solid plastic designed for
mounting into container wall.
VP01/02 are available in a
Polysulfone housing resis-
tant to most acids and bases.
VP03/04EM are available in a
Polyamide 12 housing resis-
tant to various solvents.
VP23/24 are available in a
stainless steel housing.
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
Nickel-plated brass Cable VP 22 EPM
Nickel-plated brass Plug VP 22 EPM-1
Stainless steel Cable VP 24 EM VP 23 EM VP 24 EPM VP 23 EPM
Specifications
Rated operational voltage 10 - 40 VDC
Rated operational current
Continuous 200 mA
Voltage drop ≤1.0 VDC
No-load supply current ≤7 mA
Sensing accuracy
Liquid level difference Horizontal mounting: ± 5 mm
Vertical mounting: ± 2.5 mm
Ambient light 0 - 50.000 lux
Frequency of
operating cycles (f) 30 Hz
Environment
Degree of protection IP 67
Operating temperature -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
VP23/24 Stainless steel (AISI 304)
VP22 Nickel-plated brass
Tip material
VP01/02/22 Polysulphone
VP03/04/23/24 Polyamide 12
Weight
VP0x 90 g
VP2x 190 g
Connection
Cable PVC, 2 m
Plug (-1) M12 x 1
Cable for plug (-1) CON.1-... series
Pressure
VP0x 10 bar at + 60ºC
VP2x 10 bar at + 80ºC
Pipe thread 3/8” PT
Types VP, Modulated
Level Sensors
Ordering Key VP 2 2 E P M -1
2Specifications are subject to change without notice (02.10.02)
BU-
Mode of Operation
The sensor contains IR trans-
mitter, 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 phototransis-
tor placed in the other side of
the sensor head, 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 tran-
sistor will not receive any sig-
nal.
The sensor types can operate
in oil, waste water, aqueous
solutions such as beer, wine,
alcohol etc. without any kind
of accessory.
Dimensions
VP02/04/24 EM VP01/03/23 EM
BN+ BN+
BN+ BN+
BU- BU-
BU-
BK BK BK BK
VP0xEM, VP0xEPM
Pipe thread ISO 228/1-G 3/8”
VP, modulated
VP0xEM, VP0xEPM
Wiring Diagrams
VP02/04/22/24 EPM VP01/03/23 EPM
VP23/24EM, VP22/23/24EPM
Pipe thread ISO 228/1-G 3/8”
Installation Hints
Relief of cable strain Protection of the sensing face Switch mounted on mobile carrierTo 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 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
Ø 14.6
19 19
SW 27
ISO 228/1-G 3/8"
20
70.5
8
M12 x 1
Ø 12.6
VP22EPM-1
