The visual column piston flow switch uses the medium to push the plunger spring to the set position and then output the on-off signal through the magnetic field acting on the reed switch. It has extremely small pressure loss and is equipped with a field pointer indicator to facilitate the observation of flow rate.
High stability, complete isolation of mechanical and electronic parts. Both liquid and gas can be measured. High pressure resistance, corrosion resistance, suitable for various pipeline cut-off protection, leakage alarm, pump idling alarm or control.
Features
- With on-site pointer indication, flow rate can be observed;
- Small pressure loss, strong anti-fouling ability, good repeatability;
- The mechanical part and the electronic part are completely isolated, with good sealing performance;
- Can be switched at very low flow, with a wide range of applications;
- Compact and simple structure, high pressure resistance;
- A variety of materials and pressure resistance levels are available;
- Liquid contact material: stainless steel, POM plastic;
SI-80 Sight-Column Piston Type Flow Switch Technical Parameters
| Setting range | See parameter table for details |
| Repeatability | ±3% total range |
| Hysteresis | Depending on the switch point, minimum 0.5L/min |
| Switch setting scale | Calibrated in water medium, 20℃ temperature, horizontal installation state. Installation position, medium and temperature changes will slightly affect the switch value, |
| Wiring method | Hissman connector |
| Output | Reed switch, capacity 24VDC/250VAC, 1.5A |
| Withstand pressure | 100bar (brass type), 200bar (stainless steel type) |
| Average pressure loss | 0.3bar (at 25L/min) |
| Medium temperature | Maximum 90℃ |
| Protection level | IP65 |
| Stainless steel | Model | Pressure (bar) | Maximum flow rate L/min (water) | Adjustable range L/min (water) | Weight (kg) | |
| G1/4 | 200 | 10 | 0.4….4 | – | 1.4 | |
| G3/8 | 200 | 20 | 0.4….4 | 1….12 | 1.4 | |
| G1/2 | 200 | 40 | 1….12 | 3….30 | 1.3 | |
| G3/4 | 200 | 60 | 3….30 | 5….40 | 1.3 | |
| G1 | 200 | 80 | 5….40 | 6….60 | 1.2 | |
Piston Type Flow Switch Application
The visual column piston flow switch is mainly used to monitor the flow rate of fluid in the pipeline, flow interruption monitoring or prevent the pump from running dry.
It is widely used in various industries where it is necessary to monitor the flow rate of fluid in the pipeline or protect important equipment when the liquid flow fails. Such as protecting water pumps, monitoring lubricating oil circuits, refrigeration and heating circuits, monitoring pipeline ruptures, monitoring leaks, etc.
More Flow Switches
Sino-Inst supplies various types of flow switches. Piston flow switches are highly adaptable and flexible in design and application. They can adapt to the flow monitoring needs of different media (such as liquids, gases, etc.) and can be customized according to actual needs.
If you need to purchase piston flow switches, please feel free to contact our Sino-Inst sales engineers!