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2-point control (pump) or 1 switching point (alarm) Nominal pressure
PN 16 according to EN/DIN Operating temperature
0 to 300°C Ambient temperature
0 to 70°C Density of the liquid
> Pump control
min. 0.45 kg/dm³ > Alarm
min. 0.30 kg/dm³ Operating differential
> A 01 140
12 to 1340 mm > A 01 141
12 to 2840 mm Wetside material
Stainless steel (CrNiMo) Housing material
seawater resistant die cast aluminium Flange
square 92 x 92 mm, 92 mm PCD Switch element
Microswitch SPDT with silver contacts Switch rating
250 VAC, 5 A / 30 VDC, 5 A Enclosure
IP65 Safety integrity level (SIL)
SIL 1 (Types AA 01 140 – AA 01 141: SIL 2) Approvals
ABS, BV, ClassNK, DNV-GL, LR, RINA, RMRS
Setting the switching differential 1. For pump control (two switch points): The required differential is set by fixing the two stop collars in the appropriate positions on the rod. The counterweight is adjusted to compensate for the rod weight (without float), until the cross arm is balanced. The float slides up and down the rod with the liquid level and actuates the switch at the set position of the stop collars.The switch remains latched between the two positions , which are for applications such as pump control where the contact or coil would need to remain energised throughout the pumping cycle. 2. For alarm duty (one switch point): Only the lower collar is fixed on the rod (below the float).Within the limit of the rod length, the height of the alarm point can be chosen as required .The counterweight has to be set to out weigh the rod (without float ). The alarm switching differential is 12 mm, fixed.
