Kelco Engineering UB25 Series Flow Switch are magnetically actuated piston-style sensors that switch in response to very low fluid flows or flows up to 100L/min. These switches are ideal for all types of pressure-boosting pump control and for the control of commercial or domestic hot and cold water systems.
The Descriptions of Kelco Engineering UB25 Series Flow Switch
The UB25 flow switch is supplied as standard and fitted with a magnetic piston retainer that allows the switch to be oriented in any required position in the pipework. In the vertical pipe, the workflow can be either upward or downward through the switch.

There are no springs in the wetted area of the switch, which with the magnetically isolated piston provides an exceptionally reliable mechanism. For monitoring of industrial safety showers where extreme reliability is paramount, we recommend our UB25-C model.
Features of Kelco Engineering UB25 Series Flow Switch
- Australian made
- Suits 25NB (1 Inch) Pipework
- Versatile all-position mounting
- 200Bar 290Psi Pressure rating
- Diesel and oil suited models available
- IP67 Weatherproof housing
- Solid machined Stainless Steel body
- High flow-through rating
- Handles liquids up to 90°C
Constructions
The body of the UB25 Series flow switches is machined from solid Stainless Steel. The piston is glass-reinforced Polypropylene for water applications or Nylon for oil
applications. The piston return mechanism and the electrical switching action within the switch are achieved using high-power magnets operating through the solid body of the switch.
The electrical housing is hose-proof & weatherproof and is supplied with a 20mm cable gland, for conduit or cable entry. The switch has a 25mm 1” BSPT male Inlet and 1” BSPT female outlet. Three electrical modules are available to suit the UB25 flow switch. Details of these options are set out in the table below.
Source: kelco.com.au
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