APG FLX Series Multi Point Stem Mounted Float Switch Installation Guide

The FLX series float switch consists of up to seven reed
switches in a stainless steel stem with permanent magnets in the
floats. The float’s movement with the liquid level triggers the
corresponding reed switch to provide SPST switching action. The
product is approved for hazardous locations.

2. How To Read Your Label

The label includes the model number, part number, and serial
number. The model number indicates the configuration options.
Compare it with the datasheet for exact details. Contact us for
assistance with identifying your product.

3. Warranty

The product is covered by a 24-month warranty against defects.
Visit our website for detailed warranty information and contact
Technical Support for Return Material Authorization before
returning a product.

4. Dimensions

The FLX dimensions are as follows:

Stem Length: Minimum 2.0 inches (51 mm)
Float Stop: Minimum 2.0 inches (51 mm)

14 mm Float

5. Mounting and Installation Instructions

Ensure the FLX is installed according to drawing 9003281 for
safety approvals compliance. Do not adjust switch points as it can
invalidate safety approvals.

6. Wire Color Diagrams and Table

Refer to the user manual for wire color diagrams based on the
number of switches in your FLX model.

FAQ

Q: Can the switch points on the FLX be adjusted?

A: No, the switch points on an FLX cannot be moved, changed, or
adjusted as it can affect safety approvals.

Q: How do I identify the configuration of my FLX model?

A: Refer to the model number on the label and compare it with
the datasheet or contact customer support for assistance.

Q: What is the warranty period for the FLX series float
switch?

A: The product is covered by a 24-month warranty against defects
in material and workmanship under normal use.

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Thank You
Thanks for purchasing a FLX series multi-point stem-mounted 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 888525-7300. You can also find a full list of our product manuals at: www.apgsensors.com/resources/product-resources/user-manuals

FLX Stem-Mounted Float Switches Installation Guide
For FLX Series

Table of Contents
1. Description 2. How To Read Your Label 3. Warranty 4. Dimensions

5. Mounting and Installation Instructions
6. Wire Color Diagrams and Table
7. Removal Instructions

8. General Care 9. Repair Information 10. Hazardous Location Wiring

APG
R
Automation Products Group, Inc. 1025 W 1700 N Logan, UT 84321 www.apgsensors.com | phone: 888-525-7300 | email: sales@apgsensors.com

Part # 200852 Doc # 9006502 Rev B

1 Description
The FLX contains up to seven reed switches in a 1/2 inch diameter stainless steel stem and permanent magnets in the floats. As each float rises or falls with the level of the liquid, the magnet inside the float acts on the corresponding reed switch inside the stem to provide SPST switching action. The FLX carries explosion proof and non-incendive hazardous location approvals.
2 How To Read Your Label
Each label comes with a full model number, a part number, and a serial number. The model number for the FLX will look something like this:
SAMPLE: FLX-4T2-A-1-B-21.00
The model number correlates with all the configurable options and tells you exactly what you have. Compare the model number to the options on the datasheet to identify your exact configuration. You can also call us with the model, part, or the serial number, and we can help you.
You’ll also find all hazardous certification information on the label.

5 Mounting and Installation Instructions
Mounting Instructions: · Flange Mounting: Provide the compatible mating flange on the tank and install using a suitable gasket. · Plug Mounting: Provide the compatible female boss on the tank and install the FLX with a suitable gasket, O-ring, or thread tape.
Installation Notes: · Do not locate the FLX series sensor near inlets/outlets. · If there is surface wave action, then use a time-delay relay or stilling tube. If a stilling tube is used, drill vent holes in the tube and use a spacer to assure the float has free travel inside the tube (See Figure 5.1). · The FLX can be mounted up to 30° from vertical.

3 Warranty
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 www.apgsensors.com/resources/warranty-certifications/warranty-returns/. Contact Technical Support to receive a Return Material Authorization before shipping your product back.

Inflow

Inflow Stilling
Tube

30° 30°

Spacer

30°

Figure 5.1

DANGER: Do not remove the housing cover until the atmosphere
is determined safe, and the power supply is turned off.

4 Dimensions
4.375″ [111 mm] 4.375″ [111 mm]

FLX Dimensions

4.375″ [111 mm]

Electrical Installation Instructions: · Install conduit and/or cable with necessary seal(s) per Drawing 9003281. · Remove the housing cover. · Check the Wire Color Diagrams and Table in section 6 before making any connections. · Connect the wire(s) for your system to the appropriate terminal for each switch. · Replace the housing cover. · For inductive loads or high-voltage/high-current resistive loads, provide circuit protection for switch(es) (See Figure 5.2). See Specifications on the data sheet or user manual for switch ratings. Circuit protection must be located in non-hazardous areas.

Stem Ø 0.54″
14 mm Float
Float Stop

Stem Ø 0.54″
14 mm

Stem Length

Float

Minimum

3.0″

[76 mm]

Float Stop

Minimum 2.0″
[51 mm] Stem Length
Minimum 2.0″
[51 mm]

Protecting Circuit Using Diode Protecting Circuit Using Varistor Protecting Circuit Using CR E
L

R C

C = 2I/10 (uF)

Approx.

E (I

50/E)

Figure 5.2

IMPORTANT: Your FLX MUST be installed according to drawing
9003281 (FLX Hazardous Location Mounting) to meet listed approvals. Faulty installation will invalidate all safety approvals and ratings.
IMPORTANT: The switch points on an FLX CANNOT be moved,
changed, or adjusted.

6 Wire Color Diagrams and Table Wire Colors For Four or Fewer Switches
Black Black White White Red Red Green Green

Wire Colors For Five or More Switches Black White Red Green Yellow Brown Blue

Grey

Common

L1 L2 L3 L4 L5 L6 L7

NOTE: L1 refers to the top-most level switch.

Wire Color Table for Every Switch Configuration

No. of

Wiring Color

Levels L1 L2 L3 L4 L5 L6

L1 Blk x 2

L2 Blk x 2 Wh x 2

L3 Blk x 2 Wh x 2 Red x 2

L4 Blk x 2 Wh x 2 Red x 2 Grn x 2

L5 Black White Red Green Yellow

L6 Black White Red Green Yellow Brown

L7 Black White Red Green Yellow Brown

L7
Blue

Com.
Grey Grey Grey

IMPORTANT: DO NOT EXCEED CONTACT RATINGS! A back
electromotive force of several hundred volts (energy stored in the inductance) arises when the contacts are opened under inductive loads or high-voltage/high-current resistive loads. This results in considerable decrease in contact life.
DANGER: OPEN CIRCUIT BEFORE REMOVING COVER or KEEP COVER TIGHT
WHILE CIRCUITS ARE ALIVE; AVERTISSEMENT — COUPER LE COURANT AVANT D’ENLEVER LE COUVERCLE, ou GARDER LE COUVERCLE FERME TANT QUE LES CIRCUITS SONT SOUS TENSION.

7 Removal Instructions
Removing your FLX from service must be done with care. It’s easy to create an unsafe situation, or damage your sensor, if you are not careful to follow these guidelines:
· Ensure all switch circuits are de-energized. · Disconnect all switch circuits. · Remove the FLX with an appropriately sized wrench (per your mounting type). · Clean the FLX’s stem and floats of any debris (see General Care) and inspect for damage. · Store your FLX in a dry place, at a temperature between -40° and 85°C (-40° and 185°F).

9 Repair Information
If your FLX level sensor needs repair, contact us via email, phone, or online chat on our website. We will issue you an RMA number with instructions.
· Phone: 888-525-7300 · Email: sales@apgsensors.com · Online chat at www.apgsensors.com

8 General Care
Your FLX series stem-mounted multi-point float switch is very low maintenance and will need little care as long as it is installed correctly. However, in general, you should:
· Periodically inspect the stem and floats for any trapped debris, sediment, or other foreign material.
· Avoid applications for which the FLX was not designed, such as extreme temperatures, contact with incompatible corrosive chemicals, or other damaging environments.
· If your FLX has an NPT mount, inspect the threads whenever you remove it from duty or change its location.
· Never leave the housing cover off. If the cover is damaged or lost, order a replacement immediately.

DANGER: EXPLOSION HAZARD-DO NOT DISCONNECT WHILE CIRCUIT IS LIVE
UNLESS AREA IS KNOWN TO BE NON-HAZARDOUS; AVERTISSEMENT — RISQUE D’EXPLOSION. NE PAS DEBRANCHER TANT QUE LE CIRCUIT EST SOUS TENSION, A MOINS QU’IL NE S’AGISSE D’UN EMPLACEMENT NON DANGEREUX.
IMPORTANT: SEAL SHALL BE INSTALLED WITHIN 50 mm OF THE
ENCLOSURE; IMPORTANT — UNSCELLEMENT DOIT ETRE INSTALLE A MOINS DE 50 mm DU BOITIER.

10 Hazardous Location Wiring

A u to m a tio n P r o d u c ts G r o u p , In c .

1 0 2 5 W e s t 1 7 0 0 N o rth L o g a n , U ta h U S A 8 8 8 .5 2 5 .7 3 0 0

Documents / Resources

	APG FLX Series Multi Point Stem Mounted Float Switch [pdf] Installation Guide FLX Series Multi Point Stem Mounted Float Switch, FLX Series, Multi Point Stem Mounted Float Switch, Stem Mounted Float Switch, Mounted Float Switch, Float Switch, Switch
	APG FLX Series Multi Point Stem Mounted Float Switch [pdf] User Manual 9003283, 200548, FLX Series Multi Point Stem Mounted Float Switch, FLX Series, Multi Point Stem Mounted Float Switch, Stem Mounted Float Switch, Mounted Float Switch, Float Switch, Switch

References

User Manual

FLX Series Multi Point Stem Mounted Float Switch

Specifications

Product Usage Instructions

1. Description