Specifications are subject to change without notice (05.11.99)
1
Unmodulated infrared sensor for liquid
level detection
Approved for Ex-applications (DC-types)
Built-in amplifier, Ga-As diode
Output: Transistor NPN/PNP or SCR, make or break
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 (only DC types)
Power supply: DC types: 10 to 40 VDC
AC types: 110 or 230 VAC
Level Sensors
Product Description
Optical level sensor with un-
modulated, infrared light for
the detection of liquids.
Fitted with built-in amplifier.
Transmitter and receiver are
completely self-contained 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 avail-
able in a Polyamide 12
housing resistant to various
solvents.
Type
Housing
Output status
Output type
PNP output
Type Selection - DC Types (Ex-approved)
Housing material
Ordering no.
Ordering no.
Ordering no.
Ordering no.
Transistor NPN
Transistor NPN
Transistor PNP
Transistor PNP
Make switching
Break switching
Make switching
Break switching
Polysulphone
VP 02 E
VP 01 E
VP 02 EP
VP 01 EP
Polyamide 12
VP 04 E
VP 03 E
VP 04 EP
VP 03 EP
Type Selection - AC Types
Housing material
Ordering no.
Ordering no.
Ordering no.
Ordering no.
Make switching
Break switching
Make switching
Break switching
110 VAC
110 VAC
230 VAC
230 VAC
Polysulphone
VP 02-110TB
VP 01-110TB
VP 02-230TB
VP 01-230TB
Specifications
Transistor NPN/PNP
SCR output AC types
Rated operational voltage
10 - 40 VDC
110 VAC: 100 - 121 VAC, 45 - 60 Hz
230 VAC: 195 - 265 VAC, 45 - 60 Hz
Rated operational current
Continuous
200 mA
10 - 100 mA
Voltage drop
1.0 VDC
9.0 VAC
No-load supply current
12 mA
7 mA
Sensing accuracy
Liquid level difference
Horizontal mounting: 5 mm
Horizontal mounting: 5 mm
Vertical mounting: 2.5 mm
Vertical mounting: 2.5 mm
Ambient light
0 - 100 lux
0 - 100 lux
Frequency of operating cycles (f)
30 Hz
5 Hz
VP 0 3 E P
Optical
Type VP, Unmodulated
Ordering Key
2
Specifications are subject to change without notice (05.11.99)
Specifications (cont.)
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 90C. 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
Wiring Diagrams
A
B
DC-types AC-types
A mm 6.0
6.7
B mm 4.1
5.2
VP01-...TB
VP02-...TB
VP01E, VP03E
VP01EP, VP03EP
Pipe thread ISO 228/1-G 3/8"
BN
BK
BU
BU
BK
BN
Transistor NPN/PNP
SCR output AC types
Environment
Degree of protection
IP 67
IP 67
Operating temperature
-20 to +80C (-4 to +176F)
-20 to +80C (-4 to +176F)
Storage temperature
-40 to +100C (-40 to + 100F)
-40 to +100C (-40 to + 100F)
Indication for output status
LED, yellow
-
Housing and tip material
VP01/02
Polysulphone
Polysulphone
VP03/04
Polyamide 12
Weight
90 g
90 g
Connection
Cable (PVC), 2 m
Cable (PVC), 2 m
Pressure
10 bar at + 60C
10 bar at + 60C
Pipe thread
3/8" PT
3/8" PT
Ex-approval
DEMKO certificate of conformity
no. 92C.103973X
VP, unmodulated
VP02E, VP04E
VP02EP, VP04EP
BN
BK
BU
BU
BK
BN
BN
BU
BN
BU
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