Jola Spezialschalter K. Mattil & Co. KG
Klostergartenstraße 11-20
D-67466 Lambrecht
Phone: +49 63 25 / 188-01
 
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Float switch made of stainless steel

SMH/E/1

 
Picture 2
For light current applications

Only for use in liquids with a specific density >=0.7 g/cm³
Brochure Float switches SM [PDF]
Switching voltage AC min. 1 V
Switching voltage AC max. 42 V
Switching voltage DC min.  1 V
Switching voltage DC max.  42 V
Switching current AC min. 0.1 mA
Switching current AC max.  100 mA
Switching current AC max.
(inductive loads)		 50 mA
Switching current DC min.  0.1 mA
Switching current DC max.  10 mA
Switching capacity AC max.  4 VA
Operating principle 
microswitch: changeover contact
Float material stainless steel 316 Ti
Float form ball float
Float diameter 95 mm
Bellows material stainless steel 316 Ti
Screw-in nipple material stainless steel 316 Ti
Screw-in nipple dimension G1
Flange 
On request: blind flange DN 100 with G1 thread 
made of steel St 37 or stainless steel 316 Ti
Float protection class IP 68
Connection head 
PP with M 20 x 1.5 cable entry, 
protection class IP 54
Mounting orientation horizontal
Mounting from the side
Temperature resistance 
0° C to + 100° C
(inside the connection head: 0° C to + 60° C)
Pressure resistance 
for pressureless applications
(test pressure: max. 2 bar at + 20° C);
on request:
pressure resistance up to 4 bar at + 20° C / 
d >= 1.0 g/cm³
test pressure: max. 6 bar at + 20° C)
 
On request: extension piece for float, horizontal or vertical, as desired
(Attention!  "specific density >=..."  specification without the optional extension piece
for the float)

On request: connection head made of cast aluminium, protection class IP 54

To protect the user and the contacts of our apparatus we recommend the use of our
KR .. protection relays (see product group "Protection relays and alarm relays", 
click on heading "Others").

For full alarm, empty alarm or run dry protection:     1 relay per float switch
For on/off control (with self-hold):                        1 relay for 2 float switches
 
This unit is not suitable for use in turbulent liquids (e.g. in stirrer tanks).

Mounting instruction:

This float switch must be mounted horizontally.
- remove the pin,
- unscrew the float,
- screw the float switch with its seal into the G1 tank socket or flange borehole,
- seal in place,
- loose the two cheese head screws on the side – but do not remove –,
- set the connection head in such a way that the label “TOP” is at the top and the cable entry
  at the bottom,
- retighten the two cheese head screws,
- screw back in place the float,
- secure the float using the pin.

 
Measure drawing
Basic circuit
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