LR03 - PLASTIC FLOAT SWITCH
Method of Operation
L E V E R
M O U L D E D
C A B L E S E A L
M I C R O S W I T C H
A N T I - V I B R A T I O N
M O U L D I N G
S T E E L
R O L L E R B A L L
B L A C K
B L U E
B R O W N
P V C O R C P E
S Y N T H E T I C
R U B B E R C A B L E
The micro-switch assembly inside the float, axially mounted in line with the weight, changes contacts
according to the float’s position, as in the diagram below. Therefore as the liquid level drops or rises slowly,
a pump or flow control suitably connected, can be switched in or out to maintain an average level of the
liquid. By connecting only one side of the switch, the unit can be also used to fill or empty the tank as
required.
Dimensions, in mm, do not take into consideration
any lateral swing of the cable.
4 5 °
4 5 °
C O N T A C T B E T W E E N B R O W N
A N D B L U E L E A D S I S M A D E
3 3 0 M I N .
O P E R A T I V E
D E P T H
2 8 0 M I N .
C O N T A C T B E T W E E N B R O W N
A N D B L A C K L E A D S I S M A D E
O P E R A T I N G P O I N T S A R E A P P R O X I M A T E O N L Y
Contact rating:
250V 15A, non-inductive.
250V 10A, inductive.
1.3 HP
NOTE: Local Regulations may limit the voltage.
Max. temperature
70° C
Max. submerged depth 20 metres
Compressive Strength
482 KN/m² (70 lbf/in²)
Operational in specific gravities from 0.9 to 1.3
A comprehensive list of chemical resistances for the
LR03 float switch is available on request.
LR03-Weight
275 g
Connection diagram for automatically emptying tank
B L A C K L E A D
B R O W N L E A D
B L A C K L E A D
C O I L F O R M A X .
2 4 0 V ( A C )
A
B
C
T O P U M P
M O T O R
M A I N S S U P P L Y
N L 3 L 2 L 1
Connection diagram for automatically refilling tank
B L U E L E A D
B L U E L E A D
B R O W N L E A D
C O I L F O R M A X .
2 5 0 V ( A C )
M A I N S S U P P L Y
A
B
C
T O P U M P
M O T O R
N L 3 L 2 L 1
When ordering please specify part numbers.
Type
Part Number
Weight (Approx)
Type
Part Number
Weight (Approx)
5 metre PVC cable LR03-L05M-PVC
0.6 Kg
5 metre CPE cable LR03-L05M-CPE
0.6 Kg
10 metre PVC cable LR03-L10M-PVC
1.1 Kg
10 metre CPE cable LR03-L10M-CPE
1.1 Kg
20 metre PVC cable LR03-L20M-PVC
2.1 Kg
20 metre CPE cable LR03-L20M-CPE
2.1 Kg
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