Installation Instructions for
Industrial Series Optical Liquid Level Sensors GENERAL DESCRIPTION
The LLC Industrial Series liquid level sensor provides a single
point detection via a TTL compatible output.
Sensor range was designed to directly switch incandescent
indicators, sounders or relays.
An infra-red LED and phototransistor accurately positioned at
the base of the cone ensure good optical coupling between
the two when the sensor is in air. When the sensor’s cone is
immersed in liquid, the infra-red light escapes from the cone
causing a change in the amount of light at the phototransistor
which makes the output change state. Various electrical outputs
are available to suit different applications.
ELECTRICAL SPECIFICATIONS
Supply voltage (Vs) 5 to 15Vdc or 10 to 28Vdc (±5%)
Supply current 15 mA nominal
Output Type An “L” in the part number indicates that
The sensor output will go low in air.
Otherwise the output will be high in air
(see notes below).
Output sink/source
current (lo) 500 mA max
Operating temperature -40 to +85°C (standard temperature range) or
-40 to +125°C (extended temperature range)
Storage temperature -40 to +85°C (standard temperature range) or
-40 to +125°C (extended temperature range)
MOUNTING
Housing Type LLC200 and
LLC210 series
LLC600 and
LLC610 series
Thread M12x1x8g with hex nut * ½” SAE with o-ring *
Tightening torque 1.5 N m/13.26 in lb max.
Pressure (using sealing washer/O-ring) 7 bar max
Mounting hole Ø12mm Ø ½ Inch
Housing Material Polysulphone
Sensor Termination 20AWG, 250mm PTFE Wires, 8mm Tinned
WIRE DESIGNATION
RED Vs
GREEN OUTPUT
BLUE 0V
Sensor Schematic
Vs
0V
OUTPUT
PART NUMBERING SYSTEM
ITEM = -001
N-Channel Open Drain with Flyback protection
diode for use with inductive loads
To rest of LL Sensor circuit
V+
0V
O/P
D
Din
LOAD
To rest of LL Sensor circuit
V+
0V
O/P
Din
LOAD
ITEM = -004
P-Channel Open Drain
To rest of LL Sensor circuit
V+
0V
O/P
Din
LOAD
LOAD
ITEM = -005
N & P-Channel Open Drain Push-Pull Output
To rest of LL Sensor circuit
V+
0V
O/P
Din
R
ITEM = -002
Digital output with internal pull-up resistor
- Intended for connection to digital interface
To rest of LL Sensor circuit
V+
0V
O/P
Din
LOAD
ITEM = -003
N-Channel Open Drain
2 – LLC200
6 – LLC600
LLC X X X D 3 X X - ITEM
Housing Style
0 – -25OC to +80OC
1 – -40OC to +125OC
Temp. Range
001 – N-Channel Open Drain with flyback diode*
002 – Digital Output (Sink Current Only)
003 – N-Channel Open Drain
004 – P-Channel Open Drain
005 – N & P Channel Push-Pull Output
* For use with inductive loads
Output Circuit
24 – 10 to 28V d.c.
Blank – 5 to 15V d.c.
Supply Voltage
L – Output low in air
Blank – Output high in air
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