Data Sheet

45
LLN Series
Industrial sensors
Features
• Solid-state reliability
• No moving parts
• TTL - compatible - 200 mA sinking output; fast
response
• Reverse polarity and overvoltage protection
• Stainless-steel housing for long life and ease of
cleaning
• Quick-connect, industry standard cable assembly for
easy installation
• Wide operating temperature range (-40 °C to +125 °C)
• Polysulphone sensor dome suitable for hygiene
applications
• High pressure housing, rated up to 25 bars
• High degree of sealing-IP67
• CE certified
Description
LLN Series industrial liquid level sensors are designed for
industrial environments exposed to extremes of
temperature, pressure, vibration and shock. Standard
devices feature rugged stainless steel housings and
polysulphone domes.
The mode of operation is based on the same principal as
the LL series.
An internal regulator enables a supply voltage in the
range of 10-40 Vdc to be used while the output is capable
of sinking up to 200 mA.
Principle - in air
Typical applications
• Industrial compressors
• Machine tools
• Material handling
• Processing and packaging equipment
• Heavy duty automotive
LED
Optoschmitt
Technical information
Specifications
Operation mode User defined single on/off switch
Repeatability (mm) ±1
Hysteresis (mm) 1 (Dependent on liquid)
Response time Rising liquid level - 50 us
Falling liquid level -1s max. (in ethanol)
Response in other liquids dependent on
viscosity
Mechanical
Mounting Exterior mounting by 3/8" B.S.P. thread
Connector 3-pin integral Lumberg/Brad Harrison type
connector
Pin 1 supply (V
cc
)
Pin 3 0 V
Pin 4 output
A range of cable/connector assemblies is
available
Material Polysulphone dome; stainless steel housing
(other materials available on request)
Dimensions Dome 3,5 mm radius
Thread 3/8" B.S.P.
Hex 24 mm
Environmental
Operating temperature (°C) -40 to 125 (Sensing end only)
Storage temperature (°C) -50 to +90
Humidity No effect on operation, dependent upon
catalogue listing
Vibration / shock Qualification tested 100 to 5000 Hz at 30g to
B.S.2011 part 2.1
Pressure range (bar) 0 - 25
Ambient light limit (mW/cm
2
) 0.5 in operation
Electrical
Supply Voltage (V
cc
) 10 to 40 Vdc
Reverse voltage protection to 40 Vdc
Short circuit protection to 40 Vdc
Supply current 60 mA max
Output sink current (I
0
) 200 mA max