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Process Control Instruments, Field Devices and Industrial Automation
PRODUCTS & SERVICES is a provider of process control instruments and field devices for Oil & Gas, Industrial Machinery, Pipelines, Custody Transfer, Tank Gauging, Waste Processing, Water Treatment Plants, Burner Management Systems and Incinerators, Conveyor Control, Food & Beverage, Motor, Pump & Compressor Control, Wireless Telemetry, Data Logging, Real-Time Process Data to Web.

We are an online distribution channel of genuine manufactured instruments such as

  • Flow Transmitters, Indicators, Sensors and Switches.
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EH Soliswitch FTE20 Rotary paddle Point level switch for bulk solids. Extremely robust polymer suitable for dust explosive areas. NPT 1 1/2", NPT 1 1/4" or G 1 1/2" Process Connection. ATEX, FM and IECEx approvals.

Part# with Options:        FTE20-AA11AA31
Price with Options:        Please Email us your request for quote   


(1) Approval for EH FTE20
Process Connection & Material
(2) Process Connection & Material for EH FTE20
Version & Length
(3) Version & Length & Material for EH FTE20
Power Supply
(4) Power Supply for EH FTE20
Paddle & Material
(5) Paddle & Material for EH FTE20

  Availability 7 Days  ]


The Soliswitch FTE20 is a paddle switch for granular solids. Its robust and compact design makes the point level switch an ideal sensor for detecting the full, empty or refill status in applications with bulk solids, such as in silos containing solids.

  • Full sensor
  • Empty sensor
  • Point level sensor
Your benefits
  • Safe operation
    • Automatic rotation monitoring (optional)
    • Optical rotation monitoring
    • Ex approvals: ATEX II 1/2D, FM DIP/ II, III/1/E-G
    • Switching threshold can be set even during operation
    • Robust plastic housing with cover with sight glass
  • Fault detection without uninstalling the device by means of
    • Visualization of shaft rotation, visible when device is installed
    • Ability to test the switching function
  • Easy installation thanks to
    • Screw-cover housing
    • Preformed cable entries
    • Push-in double-level terminals
    • Captive screw cap
  • Weight of solids can be adjusted without the need for tools
  • Housing can be rotated through 360 to enable optimal alignment following installation
Measuring principle

The paddle switch is primarily used to detect the full or refill status in silos containing solids. When used as a refill switch, it is typically mounted from below or at an angled position from below in the silo cone. When used as a full switch, it is fitted in the roof of the silo.

The shaft and paddle are driven using a reduction gear and synchronous motor. If the paddle is stopped by material covering it, the hinged motor in the housing moves from the rest to the switch position. This movement operates two switch contacts; the first is for external level indication and the second switches off the power to the motor.

The paddle starts to rotate once the medium level falls below the paddle, the hinged motor returns to its rest position and the two contacts switch to normal operation. Intermittent loads that operate against or even in the same direction of rotation are evened out by a slip clutch.

The rotational movement of the shaft can be observed from the outside when the cover is closed. Optional automatic rotation monitoring detects a blockage or the failure of the drive unit.

Measuring system

Complete point level switch consisting of a shaft (optionally available with rope extension) with synchronous motor and slip clutch, and single pole changeover contact. Typical application areas are point level detection in bulk solids, e.g. cereals, sugar, cacao, animal feeds, washing powders, chalk, dry plaster, cement, granulates and wood chips.

Measuring Principle Paddle
Characteristic / Application universally applicable
as a full, empty and demand alarm on silos containing solids
Specialities Rotation Monitoring System
Fold-away paddle
Supply / Communication 230 VAC 50/60 Hz
115 VAC 50/60 Hz
24 VAC 50/60 Hz
20 bis 28 VDC
Ambient temperature -20 C ... 60 C
(-4 F ... 140 F)
Process temperature -20 C ... 80 C
(-4 F ... 170 F)
Process pressure absolute / max. overpressure limit 0.5 bar to 1.8 bar
(7 psi ... 25 psi)
Min. density of medium >= 80 g/l
Main wetted parts 1.4305
Max. tensile strength Rope version >1500N
Process connection NPT 1 1/2", PBT
NPT 1 1/4", PBT
G 1 1/2", PBT
NPT 1 1/2", 1.4305
NPT 1 1/4", 1.4305
G 1 1/2", 1.4305
Sensor length 75 mm (3")
100 mm (4")
120 mm (4 3/4")
200 mm (8")
300 mm (12")
Rope length of approx 2000 mm (80"), can be shortened
Communication Micro switch with changeover contact max. 10 A/250 VAC
Certificates / Approvals ATEX, FM, IEC Ex
Options Rotation Monitoring System
Signal Lamp
Fold-away paddle
Weather protection cover
Components HAW569 Surge arrester

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