Point level switch
Soliswitch FTE31
Rotary paddle switch

Simple mechanical mechanism, extremely robust and cost-effective point level switch for bulk solids

FTE31

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Specs at a glance

Process temperature

-20 °C ... 80 °C (-4 °F ... 170 °F)
Process pressure / max. overpressure limit

0.5 bar to 1.5 bar (7 psi to 22 psi)
Min. density of medium

>= 100 g/l

See all specifications

Field of application

The economical Soliswitch FTE31 is a paddle switch for point level detection in bulk materials. Its robust polymer housing and compact design makes it an ideal sensor for full, empty and demand alarm in applications with bulk solids. The optimized materials make the unit outstandingly robust and therefore suitable for use in dust explosive areas.

The universal point level switch FTE31 is used as a full, empty and demand alarm on silos containing solids. Its construction and materials make the unit suitable for use in the food industry. The unit is suitable as a level limit switch in dust-explosion-hazardous areas.

Typical applications are level detection in: Cereals, sugar, cacao, animal feeds, washing powders, chalk, dry plaster, cement, granulates, wood chips

Benefits

Reliable and economical paddle switch
Highest safety standard for dust-explosion-hazardous areas
Diverse instrument designs for use under different application conditions
Slip clutch prevents impact on paddle
Ingress protection to IP 65 / NEMA 4x / Type 4x for optimum safety in the process

Fundamental selection

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Success stories

Tagatose manufacturer upscales using process automation

Bonumose decided to enhance, automate and digitalize its tagatose manufacturing process with Endress+Hauser instrumentation to reach its company growth goals
Read the full story
Level measurement of silos on construction sites

Discover how Profibaustoffe Austria GmbH automated the monitoring of bulk material inside silos to deliver refills on a "just- in-time" basis.
Read the full story
Basics of continuous level measurement

Common technologies available for continuous level measurement are ultrasonic, free space radar, guided wave radar, capacitance, gamma and pressure.
Read the full story
Measuring the level of bulk solids stored in silos

Click for guidance on how and where to use guided wave radar, ultrasonic or pulse radar, when measuring the level of bulk solids in silos!
Read the full story
Radar level measurement in circular silos

Dust formation, abrasion and high temperatures present challenges to reliable level measurement in circular clinker silos. Download to learn how smart radar instruments provide more accurate results!
Read the full story

Measuring principle

Paddle
Characteristic / Application

universally applicable as a full, empty and demand alarm on silos containing solids
Specialities

Hinged paddle for retro-fitting
Supply / Communication

230V 50/60 Hz
115V 50/60 Hz
48V 50/60 Hz
24V 50/60 Hz
20 to 28 VDC
Ambient temperature

-20 °C ... 60 °C (-4 °F ... 140 °F)
Process temperature

-20 °C ... 80 °C (-4 °F ... 170 °F)
Process pressure / max. overpressure limit

0.5 bar to 1.5 bar (7 psi to 22 psi)
Min. density of medium

>= 100 g/l
Main wetted parts

Shaft: 1.4435
Paddle: 1.4435
Process connection

Threaded boss - thread NPT 1 1/4" or NPT 1 1/2"
Sensor length

Standard:
75 mm (3")
100 mm (4")
200 mm (8")
300 mm (12")
400 mm (16")
500 mm (20")
600 mm (24")
Communication

Relay
Certificates / Approvals

FM DIP Cl.II,III, Div.1 Gr.EFG
CSA DIP Cl. II,III, Div.1, Gr.EFG
Application limits

max. grain size 50 mm (2")

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30/09/2022
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18/05/2000

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	EN
30/09/2022
01/03/2010
01/12/2009
01/07/2008
18/05/2000

Language:	English
Version:	30/09/2022
File size:	929.6 KB
File name:	TI00068REN_1322-00.pdf

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	EN
30/09/2022
16/01/2009
01/04/2000

	EN
18/10/2022

	EN
20/04/2016

Point level switch Soliswitch FTE31Rotary paddle switch

Simple mechanical mechanism, extremely robust and cost-effective point level switch for bulk solids

Specs at a glance

Process temperature

Process pressure / max. overpressure limit

Min. density of medium

Field of application

Benefits

Fundamental selection

Success stories

Tagatose manufacturer upscales using process automation

Level measurement of silos on construction sites

Basics of continuous level measurement

Measuring the level of bulk solids stored in silos

Radar level measurement in circular silos

Measuring principle

Characteristic / Application

Specialities

Supply / Communication

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Min. density of medium

Main wetted parts

Process connection

Sensor length

Communication

Certificates / Approvals

Application limits

Back

TI Soliswitch FTE31

Level measurement

TI Soliswitch FTE31

KA Soliswitch FTE31

Device viewer

Level measurement

Catálogo Medición y Detección de nivel

Füllstandsmesstechnik

Misura di livello

Product family: Soliswitch

Product family: Contactors/transmitters, Controller, Ecograph, Memo-Graph, Power supply, Power supply and barrier, Preline, Process displays, Soliswitch

Product family: Soliswitch

Back

O-Ring D18.77x1.78 EPDM 70° Shore

Housing cover FTE-31 without O-ring

Hinged paddle cpl. FTE30 1.4435

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Power Supply

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Power Supply

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Power Supply

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Power Supply

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Power Supply

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Power Supply

Point level switch
Soliswitch FTE31
Rotary paddle switch