APG FS-500 Installation Guide

APG

Thank You

Thanks for purchasing a Series FS-500 Float Switch from us! We appreciate your business and
your trust. Please take a moment to familiarize yourself with the product and this manual before
installation. If you have any questions, at any time, don’t hesitate to call us at 888-525-7300.

Stainless Steel Horizontal Float Switch

Installation Guide

 NOTE: Scan the appropriate QR code below to see the datasheet with full specs on your

tablet or smartphone. Or visit www.apgsensors.com/support to nd it on our website.

FS-500 Datasheet (Doc #9005610)

Table of Contents

1.Description

2. How To Read Your Label

3. Warranty

Description

1

Series FS-500 Stainless Steel Horizontal Float Switches are durable oat switches with a wide range

of uses. They are compact, feature all stainless steel wetted materials, and carry CSA and NSF 169

certications. This makes the Series FS-500 an easy choice for OEM, water and wastewater, and

chemical applications. All FS-500 switches are made in the USA.

4. Installation Instructions

5. Dimensions

6. Reversing Switch Operation
(NO/NC)

7. General Care and Notes

8. Repair Information

9. Removal Instructions

Series FS-500

R

Automation Products Group, Inc.
1025 W 1700 N Logan, UT 84321
www.apgsensors.com | phone: [phone] | email: [e-mail]

Warranty

3

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.

Doc #9005611 Rev A

Part #200320

FS-500 switches should be installed in an area--indoors or outdoors--which meets the following
conditions:

• Ambient temperature between -40°F and 368°F (-40°C to 187°C); up to 500°F (260°C) for HT

• Process pressure 300 psi (20.7 bar) or less; 100 psi (6.9 bar) or less for P58 tting

• Relative humidity up to 100%

• Altitude up to 2000 meters (6560 feet)

• No chemicals corrosive to stainless steel (such as NH

How To Read Your Label

2

Each label comes with a full model number, a part number, and a serial number. The model
number for the Series FS-500 Float Switch will look something like this:

 SAMPLE: FS-500-HT-M1-M1-0.6-P1P1-48

The model number correlates with all the congurable options and tells you exactly what you have.
Compare the model number to the options on the datasheet to identify your exact conguration.

You can also call us with the model, part, or the serial number and we can help you.

, SO2, Cl2, etc.)

3

Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.

Installation Instructions

4

Installing your horizontal oat switch is easy if you follow a few simple steps:

• Appply thread tape to tapered threads

• Insert the threads into the mounting hole and begin to turn by hand.

• Use an appropriately sized wrench on the hex nut to completely tighten the threads.

• Connect the switch wires to your control system.

• Equipment must be grounded through nal installation.

• Adequate overcurrent protection must be provided at the supply.

Dimensions

5

1/4" NPT

1/2" NPT

1/2" NPT

7/8" Hex nut

1/2" NPT

6.02"

[152.9mm]

5.38"

[136.6mm]

5"

2.22"

[56.5mm]

[127.0mm]

0.58"

[14.9mm]

0.83"

[21.1mm]

FS-500...P1P0 (closed)

0.71"

°

[18.0mm]

0
3

[100.9mm]

4.80"

[122.0mm]

5.18"

[131.7mm]

6.01"

[152.8mm]

3.97"

3.58"

[91.1mm]

1.94"

[49.4mm]

2.33"

Switch Operation Orientation (NO/NC)

6

Series FS-500 switches are closed when the oat arm is level, and open when the oat arm is tilted.

• For Normally Open operation (high-level alarm), install switch with oat arm above stationary

0.62"
[15.9mm]

arm.

• For Normally Closed operation (low-level alarm), install with oat arm below stationary arm.

General Care and Notes

7

Your oat switch is very low maintenance and will need little care, as long as it was installed

correctly. However, in general, you should:

• Keep the oat arm and support arm generally clean.

• Avoid applications for which the switch was not designed, such as contact with incompatible

corrosive chemicals, or other damaging environments.

[59.3mm]

• Inspect the threads whenever you remove the switch from duty or change its location.

See FS-500 Datasheet (Document #9005610) for the following specications:

• Specic Gravity

• Actuation Angle and Hysteresis

• Electrical power rating, voltage ranges with frequencies and currents

• Full Hazardous Location ratings statements

0.92"

[23.3mm]

3/4" Hex nut

FS-500...P1P1 (open)

4.25"

[108.0mm]

2.31"

[58.6mm]

11/16" Flats

Silicon Gasket

1/2 - 13 Threads

FS-500...P58 (closed)

0.68"
[17.3mm]

°
0

3

0.5"
[12.7mm]

0.92"

[23.3mm]

4.15"

[105.4mm]

FS-500...P58 (open)

1.94"

[49.4mm]

0.31"
[7.9mm]

0.62"
[15.9mm]

2.17"
[55.2mm]

Repair Information

8

If your oat switch needs repair, contact us via email, phone, or on-line chat on our website. We will

issue you an RMA number with instructions.

• Phone: [phone]

• Email: [e-mail]

• Online chat at www.apgsensors.com

Removal Instructions

9

Removing your oat switch from service must be done with care. It’s easy to damage your switch if

you are not careful to follow these guidelines:

• Make sure the liquid is well below the level of the switch. Follow any and all procedures for

safely isolating any media contained inside the line or vessel.

• Disconnect wires to switch.

• Loosen the switch with an appropriately sized wrench.

• Twist switch until completely free of threads.

• Pull wires out through mounting.

• Store your switch in a dry place, at a temperature between -40° F and 180° F.