NOVABO Flo Float Switch
The FLO float probe measures the maximum/minimum liquid level in a tank and can signal both overflow and minimum level conditions.
Float probe, used to measure the maximum/minimum level of liquids. It signals the overflow of the tank, or its minimum level. It can be used in any type of liquid-containing tank.
Construction of the device
The FLO probe consists entirely of a float. When the liquid level rises or falls, the weight inside the float moves, changing the signal, which in turn triggers an alarm at the probe’s output.
The probe operates in two states:
- NO/NC – Normal state (NO), alarm state (NC).
- NC/NO – Normal state (NC), alarm state (NO).
To change the operating logic, connect the wires accordingly.
The FLO probe is available in three lengths: 5 m, 10 m, and 15 m.
Installation and commissioning
The liquid level detection point corresponds to the position of the float at which it tilts, causing a change in the signal from the internal sensor. It is recommended to fill the tank with water to the overflow level at the outlet.
The NFIX-1 mounting bracket should be attached to the top of the tank.
The probe should be hung at a height corresponding to the alarm level of the liquid surface.
Technical Data
| Maximum supply voltage | 250V |
| Maximum mating current | 5A |
| Maximum switching power | 750W |
| Cable | Length 5 m, 10 m, 15 m |
| Protection | IP 68 |
| Temperature in liquid | -30°C ÷ +60°C |
| Ambient temperature | -30°C ÷ +60°C |
| Dimensions | Pear-shaped, fi 80mm, height 114mm |
| Weight with cable | 760 g |
| Installation method | Vertically |
| CE Compliance | EMC Directive 2014/30/EC |
Safe Use Instructions
The appliance must be used for its intended purpose. Please read the appliance’s manual before installing. Its technical condition should be checked. Make sure that there is no mechanical damage to the housing and cable. During maintenance work, the appliance must be disconnected from the power supply.
Inspections and Maintenance
The manufacturer recommends inspecting the entire system once every 6 months or during each emptying of the tank. During the inspection, clean the probe and check for mechanical damage. A function test should then be carried out in conjunction with the control unit operating the sensor.
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Troubleshooting
- No signal / incorrect level response: Inspect for mechanical damage to the housing and cable, and ensure the probe is installed vertically at the correct height for the alarm level.
- Alarm logic reversed (overflow/minimum not matching expected behavior): Verify that the wires are connected to select the intended NO/NC or NC/NO operating state.
- Intermittent or unreliable switching: Clean the probe and run a function test together with the control unit operating the sensor.
- Verification during setup: Ensure the commissioning tank fill reaches the overflow level at the outlet to confirm correct detection at the specified level.
Documents / Resources
 | Flo Float Switch |
References
- novabo.comwww.novabo.com
- User Manualmanual.tools