AO2 is applied for many kinds of pump (e. G. Submersible pump, slush pump, centrifugal pump, stage pump, well pump etc. ) which input voltage is AC220V(50Hz) and AC230V(60Hz), SINGLE PHASE and matching power are 0.37-1.5KW and 0.75-2.2kw.

AO2 works by digital chips, act the function of up/down liquid level and pressure control into a role. Patent technical, monitor with AC digital signal, it is better than pulse signal monitor, so as to that it is reliable and stable quality. It is easy to install and simple debug.

FEATURES:
Control method:
I. Control water filling by liquid level with probe or with float switch.
Ii. Control water filling by pressure with pressure gauge and pressure tank
Iii. Control water drainage by liquid level with probe or with float switch.
Iv. Control water drainage by no load setting.
Auto/Manual working mode
Dry running protection(means no load protection, the motor will stop while the motor rotate with no load)
Over load protection(means over current protection)·
Ultra low voltage protection
Pump stalled protection
Digital Voltmeter & Ampere meter display
Recovery time of no load be adjusted from 1-240minute
The latest 5 failures enquiry
Friendly wire connection
AC digital signal monitor function with patent
More durable probe
Humanization design
Easy installation and simple debug

MAIN TECHNICAL data:
Rated input voltage and phase: AC220V/50Hz
Rated output power of motor: 0.37-1.5KW, 0.7-2.2KW
Static power wastage: <3.5W,
Dynamic power wastage: <4.5W
Ultra low voltage trip voltage: <140V
Ultra low voltage trip response time: ≤ 20 SEC
Stalled trip response time: ≤ 5 SEC
No load trip response time: ≤ 20 SEC
Over load reverse lag response time: 1-50 SEC
Error range against over load reverse lag response time: ± 15%
Liquid level control style: AC digital signal monitor by probe, float switch
The longest control distance: ≤ 500M
Pressure control style: Pressure gauge, pressure switch (NO/NC)