 
                  Specs at a glance
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                              Process temperature-20 °C ... 80 °C (-4 °F ... 170 °F) 
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                              Process pressure / max. overpressure limit0.5 bar to 1.5 bar (7 psi to 22 psi) 
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                              Min. density of medium>= 100 g/l 
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
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        Simple products 
- Easy to select, install and operate
Technical excellence
Simplicity
 
                              - 
        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity | 
|---|---|---|
| 
 Fundamental selection Meet your basic measurement needs | Technical excellence | Simplicity | 
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 Lean selection Handle your core processes easily | Technical excellence | Simplicity | 
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 Extended selection Optimize your processes with innovative technologies | Technical excellence | Simplicity | 
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 Xpert selection Master your most challenging applications | Technical excellence | Simplicity Variable | 
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                                                            Technical Information (TI)
 TI Soliswitch FTE31Point level switch 
 Economical rotary paddle point level switch
 For use in dust explosive areasEN 30/09/202201/03/201001/12/200901/07/200818/05/2000Language: English Version: 30/09/2022 File size: 929.6 KB File name: TI00068REN_1322-00.pdf 
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                                                            Short Instruction (KA)
 KA Soliswitch FTE31Point level switch EN 30/09/202216/01/200901/04/2000Language: English Version: 30/09/2022 File size: 823.2 KB File name: KA00094REN_1322-00.pdf 
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                                                            Special Documentation (SD)
 Device viewerTechnical documentation in other languages Language: English Version: 14/07/2021 File size: 478.5 KB File name: SD02429R09EN_0121.pdf 
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                                                            Fields of Activities (FA)
 Level measurementProduct overview for applications in liquids and bulk solids Language: English Version: 29/09/2025 File size: 48.9 MB File name: FA00001F00EN2625.pdf 
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                                                            Fields of Activities (FA)
 Misura di livelloMisura di livello 
 Panoramica dei prodotti per applicazioni in liquidi e solidi sfusiLanguage: Italian Version: 03/03/2023 File size: 46.9 MB File name: FA00001F00IT2522.pdf 
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                                                            Fields of Activities (FA)
 FüllstandsmesstechnikProduktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern Language: German Version: 14/10/2022 File size: 10.6 MB File name: FA00001F00DE2522.pdf 
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                                                            Fields of Activities (FA)
 Catálogo Medición y Detección de nivelGama de productos para aplicaciones con líquidos y sólidos Language: Spanish Version: 01/06/2022 File size: 7.2 MB File name: FA00001Fes Catalogo Nivel_24.22.pdf 
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                                                            Manufacturer Declaration
 Product family: SoliswitchProduct root: FTE31- 
 Declaration number: HE_00433_01.17
 Manufacturer specification: RoHSLanguage: English Version: 13/03/2017 File size: 160.9 KB File name: HE_00433_01.17 China RoHS FTE31 .pdf 
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                                                            EU Declaration
 Product family: Contactors/transmitters, Controller, Ecograph, Memo-Graph, Power supply, Power supply and barrier, Preline, Process displays, SoliswitchProduct root: FML621-, FTE20-, FTE30-, FTE31-, OFTE20-, ORIA15-, ORIA45-, ORIA46-, ORMA42-, ORSG35-, ORSG45-, OSG40-, OSG45-, RA33-, 
 RB223-, RH33-, RIA45-, RIA452-, RIA452L-, RIA46-, RMA42-, RMC621-, RMC621L-, RMS621-, RMS621L-, RN221N-, RN221NL-, RNB130-, RNS221-
 , RNS221L-, RS33-, RSG35-, RSG40-, RSG45-, RTA421-, RTA421L-
 Declaration number: EC_00569_03.22EN 18/10/2022Language: English Version: 18/10/2022 File size: 155.3 KB File name: EC_00569_03.22.pdf 
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                                                            EU Declaration
 Product family: SoliswitchProduct root: FTE30-, FTE31- 
 Declaration number: EC_00349_01.16EN 20/04/2016Language: English Version: 20/04/2016 File size: 855.4 KB File name: EC_00349_01.16.pdf 
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