APG LF datasheet

APG

Automation Products Group, Inc.

C US

®

LF Miniature Liquid Level Sensors

■

Applications

Typical applications include
automatic vending machines,
photocopiers, small collection tanks,
miniature pumping stations, pilot
plants and similar small system
applications.

Controlling delivery of plating
liquid

Nickel plating liquid is used for
surface treatment of electronic parts.
e liquid is automatically fed into
a plating bath with the LFP-V-2PG
detecting the upper and lower levels.

LF

Miniature Liquid Level Sensors

■

Compact size

■

Low cost

■

Reliability/long switch life

■

Can be used in a wide range of
liquids

■

Utility design for shock resistive
construction in the float

ese miniature liquid level
switches have been designed for
reliable operation in small tanks and
containers. eir rugged design and
careful engineering make them the

perfect solution for OEM and large
volume applications.

■

liquid level switches contains a
hermetically sealed reed switch. e
float contains a permanent magnet.
As the float rises or falls with the
level of the liquid, the reed switch is
activated by the magnet. On most
models, the operation of the switch,
normally open (NO) or normally
closed (NC), is easily changed
by removing a retaining clip and
inverting the float.

Operational Description

e stem of these miniature

Commercial Coee Maker

e LFS-V-5UN is mounted in the
water tank to detect the lower limit
of the hot water. e LFS-V-5UN is
suitable for food and pharmaceutical
applications
because the
float joints
are plasma
welded and
the surface is
buffed smooth.

File No. 156365 (LR90200-27)

Automation Products Group, Inc.

1025 West 1700 North Tel. [phone]
Logan, UT 84321 USA Fax [phone]

2

w w w . a p g s e n s o r s . c o m

s a l e s @ a p g s e n s o r s . c o m

APG

Automation Products Group, Inc.

White

Black

®

LF Miniature Liquid Level Sensors

■

Protection from Electrical
Surges

Overvoltage

Reed switches are not designed for
the direct starting of inductive loads
such as motors, contactors, solenoid
valves, etc. ey are susceptible
to damage from overvoltages. Do
not exceed the specified switch
ratings listed in the specifications
charts. Contactors should be wired
to miniature relays, suppressors or
similar devices. APG recommends
the use of the relay unit, Model
RCU-7000. (Complete RCU-7000
specifications are located at www.
apgsensors.com)

Overcurrent

Momentary surge currents
produced by switching lamps or
stray capacity from long cable
lengths can weld the reed switches.
Contactors should be wired to our
Model RCU-7000 relay unit, coils
in series, or suppressors. (Complete
RCU-7000 specifications are located
at www.apgsensors.com)

■

Submersibility

ese miniature liquid level
switches are not designed to operate
when fully submersed. e LFS­VE-S1 and LFS-VE-S2 series float
switches can be submersed for
short periods up to 76 hours under
500 mm depth of water at 20°C
temperature. Water will penetrate
the float for elevated temperatures
and/or greater depths.

■

Wiring

(yellow)

(yellow)

Switch

■

Switch Rating

See specification charts on the
following pages.

■

Technical Notes

■

e sealing compound over
the lead wire egress prevents
moisture penetration, but is
insufficient to prevent water
penetration. Please install in an
appropriate location or apply a
suitable sealant.

■

If there is surface wave motion,
use a time delay relay to dampen
the switch action.

■

e switch should be located
away from strong magnetic fields
such as those produced by motors
or solenoid valves.

■

Maximum allowable impact is 10
g. Shocks greater than this can
damage the switch.

■

Maximum tensile force on the
lead wire is 4.4 lb. (19.6 N)
Exceeding this during installation
may damage the switch.

■

controls may be used with APG
Intrinsic Safety Barriers (IS) to meet
hazardous location requirements
for level control device. For more
information see www.apgsensors.
com

Automation Products Group, Inc.

1025 West 1700 North Tel. [phone]
Logan, UT 84321 USA Fax [phone]

Intrinsic Safety

Any of the APG float switch level

■

Ordering Information



Please order by part number, as
shown on the specification charts on
the following pages.

3

w w w . a p g s e n s o r s . c o m

s a l e s @ a p g s e n s o r s . c o m

APG

Automation Products Group, Inc.

*

11.8
300

0.47
12

0.24
6

0.31
8

1.30
33

0.59
15

Ø0.98

25

Ø0.31

8

G 1/8

11.8
300

0.47
12

1.69
43

Ø0.98

25

0.59
15

0.24
6

Ø0.31

8

0.67
17

*

G 1/8

■

Plastic Float Specications

®

LF Miniature Liquid Level Sensors

(1)

(2)

(3)

Specifications are subject to change without notice.

Automation Products Group, Inc.

1025 West 1700 North Tel. [phone]
Logan, UT 84321 USA Fax [phone]

Series LFE

(3)

LFP

Model LFE11P-0❑LFE11P-1❑ LFE11R-0❑LFE11R-1❑ LFE12P-0❑LFE12P-1❑ LFE12R-0❑LFE12R-1❑ LFP-V-2A LFP-V-2F LFP-V-2PG LFP-VE-B1
Part Number Switch Type A 22152 22788 22151 22789 22157 22162 22160 22155 22458 22091 22094 22917-0049
Switch Type B 22156 22150 22197 22149 22628 22154 22587 22148
Material

Stem Polypropylene Polypropylene Polypropylene Polypropylene Polyacetal PVDF Polypropylene Polypropylene
Float Polypropylene

(1)

Buna

(1)

Polypropylene

(1)

Buna

(1)

Buna PVDF Polypropylene BUNA
Retainer 316L SS 316L SS 316L SS 316L SS 316L SS PVDF Polypropylene Polypropylene
Operating Temperature Range 14 to 194°F 14 to 194°F 14 to 194°F 14 to 194°F 14 to 194°F 14 to 212°F 14 to 194°F 175°F
(–10 to 90°C) (–10 to 90°C) (–10 to 90°C) (–10 to 90°C) (–10 to 90°C) (–10 to 100°C) (–10 to 90°C) (80°C)
Pressure Rating 7 psi 145 psi 7 psi 145 psi 145 psi 145 psi 7 psi 145 psi
(0.5 bar) (10 bar) (0.5 bar) (10 bar) (10 bar) (10 bar) (0.5 bar) (10 bar)

Mounting Vertical Vertical Vertical Vertical Vertical Vertical Vertical Vertical
Switch Rating (by model code) 0A/0B 1A/1B 0A/0B 1A/1B 0A/0B 1A/1B 0A/0B 1A/1B
Maximum Capacity 10 VA 50 VA 10 VA 50 VA 10 VA 50 VA 10 VA 50 VA 50 VA 50 VA 50 VA 50V A
Nominal Current 0.1 A 0.17 A 0.1 A 0.17 A 0.1 A 0.17 A 0.1 A 0.17 A 0.17 A 0.17 A 0.17 A 0.5 A
Maximum Voltage 100 VAC 300 VAC 100 VAC 300 VAC 100 VAC 300 VAC 100 VAC 300 VAC 300 VAC 300 VAC 300 VAC 300 VAC/DC
Life Expectancy (# of actuations) 10

7 107

10

7 107

10

7 107

10

7 107

10

Lead Wires #22 AWG #22 AWG #22 AWG #22 AWG #22 AWG #22 AWG #22 AWG #22 AWG

11.8 or 39.4 in. 11.8 or 39.4 in. 11.8 or 39.4 in. 11.8 or 39.4 in. 11.8 or 39.4 in.
(300 or 1000 mm) (300 or 1000 mm) (300 or 1000 mm) (300 or 1000 mm) (300 or 1000 mm)

Minimum SG 0.9 0.7 0.9 0.7 0.6 0.9 0.85 0.6
Dimensions — in./mm

Switch A: 0.59 in. (15 mm) Switch A: 0.71 in. (18 mm) Switch A: 0.98 in. (25 mm) Switch A: 1.10 in. (28 mm)
Switch B: 0.55 in. (14 mm) Switch B: 0.67 in. (17 mm) Switch B: 0.91 in.. (23 mm) Switch B: 1.02 in. (26 mm)

The float magnet is exposed on these models and is in direct contact with liquids.
Alternative cables in PVC are available in lengths up to 78.7 in. (2000 mm). VCTF Ø 0.20, (5.2, 0.3 mm2)
Switch action of the LFE is nonreversible. Select Code A (NC) or Code B (NO).

4

w w w . a p g s e n s o r s . c o m

s a l e s @ a p g s e n s o r s . c o m