Jola Spezialschalter K. Mattil & Co. KG
Klostergartenstraße 11-20
D-67466 Lambrecht
Phone: +49 63 25 / 188-01
 
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Floating switch for Zone 1 or 2

SI/FS/NL/1/K/RN Variante 0
I M2 / II 2 G Ex ia I / IIB T6 

  • with built-in weight for fixing of switching point

  
For use in intrinsically safe circuits in mines susceptible to firedamp or in potentially 
explosive atmospheres in categories zone 1 or 2.

EC type examination certificate: INERIS 03ATEX0149

Application in liquids with a specific density between d = 1.05 and d =0.95 g/cm³
Brochure Mercury-free floating switches and immersion probes [PDF]
Contact 
ball-operated microswitch,
potential-free changeover contact
Float material PP
Seal material FPM
Float protection class IP 68
Float diameter 74 mm
Float length 130 mm
Mounting orientation vertical
Mounting from the top
Connecting cable 
grey A05 RN-F cable, 3 x 0,75
Application range of the
connecting cable		 
for water, used water, slightly 
aggressive liquids

Connecting cable length

 
1 metre, other cable lengths on request.
When ordering, please always state the
desired cable length and cable type.
Temperature
application range 
0° C to + 60° C
Max. immersion depth
of the float		 
max. 10 metres head of water at + 20° C
Documents for application
in explosive atmospheres 		EC type examination certificate [PDF]
EC Declaration of Conformity [PDF]
Installation, operating and maintenance instructions [to the language selection] 
This unit has to be connected to a certified intrinsically safe circuit.  
We can supply appropriate protection relays on request.

Recommended application via 
Jola protection relay KR 5/Ex  I (M1) / II (1) GD [EEx ia] I / IIC 


Options for safety applications:

- diodes (= variant 1) or resistors (= variant 2) on request 


Option:

Seal material: FPM; on request: EPDM
 
This floating switch is designed for mounting from the top.

This is fitted with a built-in weight for fixing the switching point at the desired height; this
renders additional fastening of the switch at the height of the switching point unnecessary.
This weight is dimensioned in such a way that the switch tilts around its own axis when the 
liquid level rises and then follows the rising liquid level. This tilting action of the float activates 
the switching process.

This unit is not suitable for use in turbulent liquids (e.g. in stirrer tanks).

 
Measure drawing
Function sketch
Function sketch 2
Basic circuit
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