APG LFE-11P-0A, LFE-11P-0B, LFE-11P-1A, LFE-11R-0B, LFE-11R-1A LFE Manual

AUTOMATION

Operator’s Manual

PRODUCTS

GROUP, INC.

LFE Series

Industrial OEM Low Cost

Liquid Level Switches

Doc #9004721; Part #200430

Rev. A2, 11/19

Automation Products Group, Inc.

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LFE Series Rev. A2, 11/19

Table of Contents

Warranty ..................................................................................3

Introduction ............................................................................. 4

Specication ............................................................................4

Installation Location ...............................................................6

Wiring .......................................................................................7

Automation Products Group, Inc.

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Rev. A2, 11/19 LFE Series

• 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.

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LFE Series Rev. A2, 11/19

• 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.

• 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

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Rev. A2, 11/19 LFE Series

• 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 ...........................107 operations (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 ...........................107 operations (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

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LFE Series Rev. A2, 11/19

• 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.

Figure A Figure B

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

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Rev. A2, 11/19 LFE Series

• 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

Switch Rating (Resistive)

• Max capacity 50 VA, 50 W

• Max current 0.5 A AC, 0.5 A DC

Black

Yellow

• Max voltage 300 VAC, 300 VDC

Switch Rating (Resistive)

• Max capacity 10 VA, 10 W

• Max current 0.2 A AC, 0.2 A DC

Yellow

• 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.

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AUTOMATION

PRODUCTS

GROUP, INC.

Automation Products Group, Inc.

Tel: [phone]
1/435/753-7300
Fax: [phone]

e-mail: [e-mail]

www.apgsensors.com

Automation Products Group, Inc.

1025 W. 1700 N.

Logan, UT 84321