APG LFE Series User manual

Operator’s Manual
AUTOMATION
PRODUCTS
GROUP, INC.
Automation Products Group, Inc.
Tel: [phone] • Fax: [phone] • www.apgsensors.com • E-mail: [email protected]
Doc #9004721; Part #200430
Rev. A2, 11/19
LFE Series
Industrial OEM Low Cost
Liquid Level Switches

LFE Series Rev. A2, 11/19
2
Automation Products Group, Inc.
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Table of Contents
Warranty ..................................................................................3
Introduction.............................................................................4
Specication ............................................................................4
Installation Location ...............................................................6
Wiring .......................................................................................7

Rev. A2, 11/19 LFE Series
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Automation Products Group, Inc.
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• Warranty and Warranty Restrictions
This product is covered by APG’s warranty to be free from defects
in material and workmanship under normal use and service of
the product for 24 months. For a full explanation of our Warranty,
please visit https://www.apgsensors.com/about-us/terms-conditions.
Contact Technical Support to receive a Return Material Authorization
before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty
on your tablet or smartphone.

LFE Series Rev. A2, 11/19
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• Specications
Operational Versions
LFE-11P-0A ............................... for water - PP, 10 VA, NC
LFE-11P-0B ............................... for water - PP, 10 VA, NO
LFE-11P-1A ............................... for water - PP, 50 VA, NC
LFE-11R-0B ............................... for oil - Buna, 10 VA, NO
LFE-11R-1A ............................... for oil - Buna, 50 VA, NC
LFE-12P-0A ................................ for water - PP, 10 VA, NC
LFE-12R-0A................................ for oil - Buna, 10 VA, NC
LFE-12R-0B................................ for oil - Buna, 10 VA, NO
• Introduction
The miniature magnetic level sensors are used for liquid level detection. They
have been designed for reliable operation in small tanks and containers. Their
rugged design and careful engineering make them the optimum solution for
OEM and large volume applications.

Rev. A2, 11/19 LFE Series
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Automation Products Group, Inc.
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• Specications(continued)
Characteristics
Switch Rating (resistive load) (50 VA):
Max contact rating....................... 50 VA AC; 50 W DC
Max current ................................. 0.5 A AC; 0.5 A DC
Max voltage................................. 300 V AC; 300 V DC
Life expectancy ........................... 107operations (at 12 VDC, 5 mA)
Switch Rating (resistive load) (10 VA):
Max contact rating....................... 10 VA AC; 10 W DC
Max current ................................. 0.2 A AC; 0.2 A DC
Max voltage................................. 100 V AC; 100 V DC
Life expectancy ........................... 107operations (at 12 VDC, 5 mA)
Max temperature range................ -14 to 194°F (-10 to 90°C)
Max pressure ............................... Polypropylene oat: 145 psi (10 bar)
Buna oat: 145 psi (10 bar)
Min SG ........................................ Polypropylene oat: 0.9
Buna oat: 0.7
Max viscosity .............................. 0.5 Pa s
Max humidity .............................. 95% RH
Max impact.................................. 10 G

LFE Series Rev. A2, 11/19
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Automation Products Group, Inc.
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• Installation Location
Locate the LFE where the change in liquid level will actuate the switch. DO
NOT locate near liquid inlets/outlets. If there is turbulence, use a time delay
relay to dampen the switch action.
LFE-XXX-XA (Switch closes as level falls), see Figure A
LFE-11R LFE-12R LFE-11P LFE-12P
Close as level falls 18 28 15 25
Open as level rises 16.5 26.5 13.5 23.5
LFE-XXX-XB (Switch closes as level rises), see Figure B
LFE-11R LFE-12R LFE-11P LFE-12P
Close as level rises 17 26 14 23
Open as level falls 18.5 27.5 15.5 24.5
Figure A Figure B

Rev. A2, 11/19 LFE Series
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Automation Products Group, Inc.
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• Wiring
Wiring shall be in accordance with all local codes. Lead wires are #22 AWG,
UL listed (UL1430). APG recommends the use of solderless lugs for connection.
Black
Black
Switch Rating (Resistive)
• Max capacity 50 VA, 50 W
• Max current 0.5 A AC, 0.5 A DC
• Max voltage 300 VAC, 300 VDC
Yellow
Yellow
Switch Rating (Resistive)
• Max capacity 10 VA, 10 W
• Max current 0.2 A AC, 0.2 A DC
• Max voltage 100 VAC, 100 VDC
Note: Max pull-load of the lead wire is 19.6 N. Excessive pulling or kinking
of the lead wire may break the switch.
Caution!
Protection for electrical surges:
• Overvoltage
Reed switches are not designed for the direct starting of inductive loads
such as motors, contactors, solenoid valves, and so on. They are susceptible
to damage from overvoltages. DO NOT EXCEED THE CONTACT
RATINGS. Contact should be wired to miniature relays, suppressors or
similar devices.
• Overcurrent
Momentary surge current may be produced by switching lamps or stray
capacity from long cable length, consequently welding the reed switch.
Contact should be wired to a relay unit, coils in series, or suppressors.

AUTOMATION
PRODUCTS
GROUP, INC.
Automation Products Group, Inc.
Tel: [phone]
1/435/753-7300
Fax: [phone]
e-mail: [email protected]
www.apgsensors.com
Automation Products Group, Inc.
1025 W. 1700 N.
Logan, UT 84321