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Water Level Switch

The document provides an overview of the side mounted float switch (FF series), which operates on the principles of buoyancy and magnetism to control liquid levels in tanks. It details the features, including options for Micro-Switch and Reed Switch types, custom mounting flanges, and various float materials suitable for different specific gravities. Additionally, it outlines installation considerations and typical positioning for optimal performance.

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Md Jasim Uddin
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10 views5 pages

Water Level Switch

The document provides an overview of the side mounted float switch (FF series), which operates on the principles of buoyancy and magnetism to control liquid levels in tanks. It details the features, including options for Micro-Switch and Reed Switch types, custom mounting flanges, and various float materials suitable for different specific gravities. Additionally, it outlines installation considerations and typical positioning for optimal performance.

Uploaded by

Md Jasim Uddin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Side Mounting Float Switch

www.fine-tek.com
INTRODUCTION

WORKING PRINCIPLE FEATURES


The reed switch relies on two basic scientific prin- The side mounted float level sensor (FF series)
ciples namely: buoyancy and magnetism. are manufactured specifically for horizontal
Buoyancy causes the float (which contains a mounting on tanks or vessels. They work well as
magnet) to rise with the liquid and magnetism high or low level controls.
helps open and close the switch.
A change in liquid levels raises or lowers the float 1. Both Micro-Switch types and Reed Switches
up or down. The end of the pivot arm (non float are available. The MicroSwitch type is usable
side) contains a permanent magnet that can even at ambient temperatures of 100° C maxi-
repel the switch magnet (inside the stationary mum.
‘stem’ of the entire structure).
2. Mounting flanges are custom-made. (JIS,
When the float magnet moves close to the DIN,ANSI).
switch’s stationary stem, the float magnet repel 3. A wide variety of floats for different solution’s
the switch magnet which either opens or closes specificgravities (S.G.) are available.
the Electrical circuit. 4. Wetted parts material ranges from plastics,
stainless steel, anti-corrosive and explosion
proof types.

40mm

22B

40mm

WIRING

COM

NO
REED SWITCH ---- 1A, 30W 220Vac/200Vdc (FF20, 45, 55, 89 )
NC MICRO SWITCH ---- 5A/250Vac

1
CONFIGURATION DIAGRAMS

3 11
5 6 7
12
4 5
2 4 2
1 1

7
10
8 8
10
9 9

Fig.(1) Reed switch type Fig.(2) Micro switch type

1. Float 4. Pivot 7. Terminal 10. Magnet


2. Shaft 5. Housing 8. O-ring 11. Screw
3. Flange 6. Reed Switch 9. Conduit 12. Microswitch
Conduit/Connection

Tank's wall Nozzle


The diameter and length of the connecting pipe (of a
tank) are in direct proportion.
flange
UNIT: mm
Pipe dia. 45-50 50-55 55-60 60-65 65-70
(A) A
Length
(B) 130 140 150 160 170
(Max.)

2
ANTI-CORROSIVE MODELS

FF80EFM --- PC Housing


FF81E --- Without Housing
Wetted parts : P.P.
2
Cable spec. : PVC 3x0.75 mm

Order No. FF80EFM


Flange
2"x5kg/cm2

50

f44

177

14

Order No. FF81E

M20
50 connection
cable 3M

f44

177 48

8
IMPORTANCE FOR INSTALLATION

1. SUS304/SUS316 materials are not available 4. Check the liquid’s S.G. level before
for corrosive application. installation.
2. The cable duct(s) must face downward to pre- 5. The mounting hole must be larger than
vent moisture seeping in. the external diameter of the float. (Please
3. The float and extension rod must be inserted refer to p2)
into the bin completely. 6. Don't mount the devices near the bin's
inlet or outlet.

Typical Positioning

FF55DFM
FF50DFM

FF45DFM FF10CLO

FF20DEQ FF20DFM

FF10CEQ
FF79

10

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