Sensing and Control
LLE Series
Liquid Level Sensors
Features
• Solid state technology
• Small size
• Digital output
• Pre-wired
• Electrically robust
Description
The enhanced series of liquid level sensors incorporates
a photo-transistor trigger which provides a digital output
that denotes the presence or absence of liquid.
The mode of operation is derived from the principle of
total internal reflection. An LED and photo-transistor
are housed within a plastic dome at the head of the
device. When no liquid is present, light from the LED is
internally reflected from the dome to the photo-
transistor. When liquid covers the dome, the effective
refractive index at the dome-liquid boundary changes,
allowing some light from the LED to escape. Thus the
amount of light received by the photo-transistor is
reduced and the output switches, indicating the
presence of liquid. This method of liquid level sensing is
very fast, and almost instantaneous for water.
Benefits
• Accurate repeatable switching point
• Can be mounted in applications where space is limited
• Microprocessor compatible
• Easy to install saving assembly time
• Reverse polarity, over voltage, short circuit and
transient protection
Typical applications
• Home appliances
• Spa baths
• Vending machines
• Food and beverage
• Medical
• Compressors
• Machine tools
• Automotive
!
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet (or
catalogue) is for reference only. DO NOT USE this
document as product installation information.
• Complete installation, operation and maintenance
information is provided in the instructions supplied
with each product.
Failure to comply with these instructions could
result in death or serious injury.
!
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency
stop devices, or in any other application where failure
of the product could result in personal injury.
Failure to comply with these instructions could
result in death or serious injury.
2 Honeywell • Sensing and Control
Technical information
Specifications
Operation mode User defined single point on/off switch (Output is high in air)
Repeatability (mm) ± 1
Hysteresis (mm) 2 (dependent on liquid)
Response time Rising liquid level - 50 µs
Falling liquid level - 1 s max (in ethanol)
Response in other liquids dependent on viscosity
Mechanical
Mounting Type 1 and 2 - mounted from outside; Type 3 and 5 - mounted from inside
Termination 250 mm flying leads
Blue 0 V
Red +5 V to +12 V supply
Green Output
Material [Note 1] Polysulphone
Dimensions Plastic Metal
LLE101/102/103000 LLE205/305000
Dome 3,5 mm radius (includes LLE105000)
Thread M12x1 ½ in BSPT
Hex 19 mm 24 mm (See mounting drawings on page 3)
Environmental
Operating temperature (°C) -25 to 80
Storage temperature (°C) -30 to 85
Thermal testing As per BS EN60068-2-33
Humidity As per BS EN60068-2-30
Vibration As per BS EN60068-2-6 Part S3: 1996
Mechanical shock As per BS EN60068-2-27 Part 2 Ea: 1987
Pressure range (bar) 0 to 5 (plastic housing) [Note 2]
0 to 25 (metal housing)
Ambient IR light limit 10 mW/cm2 in operation
(@ 940 nm) [Note 3]
Electrical
Supply voltage (Vcc) +5 Vdc to +12 Vdc ± 5 %
Supply current (mA) 15 mA nominal @ +5 Vdc
Output sink current [Note 4] @ 25 °C 10 mA max
@ 80 °C 3 mA max
Notes:
[Note 1] Material compatibility information available on request.
[Note 2] Threaded sensors only.
[Note 3] For other ambient light environments the user should test the sensor under application conditions to verify compatibility.
[Note 4] The output is intended as a TTL compatible output signal, for interfacing to logic systems. For interfacing with other types of circuitry an
appropriate buffer circuit must be used.
Order guide
Description Catalogue Listing
Screw In, M12 Thread, Plastic (Type 1) LLE101000
(Type 2) LLE102000
(Type 3) LLE103000
Push In, Plastic (Type 5) LLE105000
Screw In, ½ in, Metal Nickel plated brass LLE205000
Stainless steel LLE305000
LLE Series
Liquid Level Sensors
Honeywell • Sensing and Control 3
LLE Series
Liquid Level Sensors
Mounting drawing (in mm and inches)
19,00
(0.75)
22,49
(0.89)
19,40
(0.76)
12,45
(0.49)
4,70
(0.19)
M12 x 1 - 8 g
0,22 mm
Tinned Ends
2
(0.01 in )
2
Ø10,00
+0,10
-0
4,1
(0.16)
13,0
(0.51)
2,3
(0.09)
16,12
(0.63)
0,22 mm
Tinned Ends
2
(0.01 in )
+0.004
-0
(0.39 )
2
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
;y
Vcc
RED
OUTPUT
GREEN
SCHMITT
TRIGGER
PHOTO
TRANSISTOR
0 V
BLUE
IRED
VOLTAGE
REGULATOR
Electrical diagram
Notes
1 Recommended panel hole size Ø 12,5
±0.3 mm (0.49 ±0.01 in)
2 ‘O’ ring seal supplied unassembled
LLE102000
(Type 2)
LLE105000
(Type 5)
19,00
(0.75)
M12 x 1 - 8 g
"L"
12,40
(0.49)
10,25
(0.40)
4,70
(0.19)
0,22 mm
2
(0.01 in
2
)
Tinned Ends
19,00
(0.75)
0,22 mm
2
(0.01 in
2)
Tinned Ends
"L"
7,20
(0.28)
10,30
(0.41)
2,70
(0.11)
M12 x 1 - 8 g
LLE101000
(Type 1)
LLE103000
(Type 3)
Cable length 12,3
(0.49)
16,00
(0.63)
24,00
(0.94)
24,00
(0.94)
45,4
(1.79)
16,5
(0.65)
Thread 1/2" BSP
Ø 14,5
0.57
0,22 mm2 (0.01 in2)
Tinned Ends
LLE205000
LLE305000
Warranty/Remedy
Honeywell warrants goods of its manufacture as being free of defective material
and faulty workmanship. Contact your local sales office for warranty information.
If warranted goods are returned to Honeywell during that period of coverage,
Honeywell will repair or replace without charge those items it finds defective.
The foregoing is Buyer’s sole remedy and is in lieu of all other warranties,
expressed or implied, including those of merchantability and fitness for a
particular purpose.
While we provide application assistance, personally, through our literature
and the Honeywell web site, it is up to the customer to determine the suitability
of the product in the application.
Specifications may change at any time without notice. The information we
supply is believed to be accurate and reliable as of this printing. However, we
assume no responsibility for its use.
This publication does not constitute a contract between Honeywell and its customers. The contents may be changed at any time without notice. It is the customer’s
responsibility to ensure safe installation and operation of the products. Detailed mounting drawings of all products illustrated are available on request.
Copyright 2004 Honeywell International Inc. All Rights Reserved.
Honeywell Sensing and Control
www.honeywell.com/sensing
Newhouse Industrial Estate
Motherwell ML1 5SB
Scotland, UK
100437-EN Issue 2 01/04 UK07 GLO Printed in the United Kingdom on environmentally friendly paper
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