Paddle level switch for granular solids

Soliswitch FTE20

11-35 Pcs.



  • Easy installation
  • 75mm shaft & 2000mm rope probe models in stock
  • Weight of solids can be adjusted without the need for tools
Solids weight ≥ 80 g/l
Operating pressure (abs.):
0.5 to 1.8 bar
IECEx Ex ta/tb IIIC Da/Db 
 Medium temperature:
–20 to +80 °C

Product/VersionPrice/pcs. in NZ$Order code
Soliswitch FTE20
ApprovalVersion, LengthProcess Connection; MaterialPower Supply1 to 34 to 1011 to 35
IECEx Ex ta/tb IIIC Da/DbShaft, 75mmThread G1-1/2; PBT230VAC530.-493.-466.-FTE20-II13AA41
Rope, 2000mm, shortable230VAC685.-637.-603.-FTE20-II13AF41

Prices are net, ex store Auckland, GST additional and valid until 30/9/2016.
EMC's standard Terms and Conditions of Supply are applicable.


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. Typical application areas are point level detection in e.g. cereals, sugar, cacao, animal feeds, washing powders, chalk, dry plaster, cement, granulates and wood chips.


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.

Application example

a) Functioning as full sensor

b) Functioning as demand sensor

Technical data

  • Output signal
  • Response time
From standstill of the paddle until output of the switching signal: 20°, corresponds to 3.5 s
  • Switching capacity relay
EN 61058: 250 V AC 5E4, 6(2) A;
L 1054: 125 to 250 V AC, 5 A;
30 V DC, 8 A;
Min. switching load 300 mW (5 V/5 mA)
  • Function
Detection of full or refill status
  • Automatic rotation monitoring (optional)
Detection of blockage or failure of the drive unit
 Power supply 
  •  Supply voltage
20-28Vdc, 230Vac.
(on request: 24Vac and 115Vac)
  • Power consumption 
Max. 3.5 VA
  • Cable entries
2 × cable gland, M20 × 1.5
Operating conditions 
  • Side load on the shaft
Max. 60 N
  • Load on the rope
Max. 1 500 N
  • Operating press. (abs.)
0.5... 2.5 bar
  • Ambient temperature
–20 to +60 °C
  • Degree of protection
IP 66
  • Vibration resistance
according to EN 60068-2-64: 0,01 g²/Hz
  • Shock resistance
according to EN 60068-2-27: 30g
  • Medium temperature
–20 to +80 °C
  • Solids weight
≥ 80 g/l
  • Grain size
≤ 50 mm
Mechanical construction
  • Material

Housing: Polycarbonate
Captive screw cap: Polyamide
Cover seal: Silicone

Shaft / Rope extension / Paddle: Stainless steel
Process seal: Synthetic/organic fiberelastomer
sealing (nonasbestos)

  • Shaft seal
  • Shaft speed
1 min-1
  • Process connection
Thread G1-1/2; Stainless Steel or PBT
  • Electrical connection
Terminals with spring terminal design,
Permitted cable cross-sections 2.5 mm²
solid, 1.5 mm² flexible with wire end
ferrule with plastic ferrule
  • Ex approval
IECEx Ex ta/tb IIIC Da/Db

Dimensions (in mm)

a) Version with rope extension

b) Version with hinged rotating paddle


A: Process connection NPT 1¼", NPT 1½", G 1½"
B: Process connection G ¾" (only available with hinged rotating paddle)
C: Indicator light (optional)
L: Length of shaft 75 to 300 mm (2.95" to 11.81")


Installation according to instruction manual.

Electrical connection

a) Protective ground
N (AC), L- (DC): Power connection
L1 (AC), L+ (DC): Power connection
H1, N/L-: Connection for signaling empty/full status detection (optional)
11: Changeover contact
12: Normally closed contact
13: Normally open contact


Correct installation positions of the device:
1: Vertical from the top
2: Angled from the top
3: From the side
4: From the side with protective cover against falling solids
5: From below


Incorrect installation positions of the device:
6: In direction of solids flow
7: Installation coupling too long


(Dimensions in mm)

Technical datasheet

TD Soliswitch FTE20 (PDF 2,94 MB)