LPH flow switch

LPH flow switch: precision monitoring for low flows

The LPH flow switch is the standard for engineers looking for a reliable "set-and-forget" solution for monitoring minimal flow volumes. Because the switch point is factory-set, this monitor offers error-free protection for expensive equipment where a constant flow is vital.

Why integrate the LPH series?

In applications where space is limited and precision is required, the LPH flow switch excels. The series is widely applicable thanks to its availability in various materials such as brass, stainless steel and Teflon®. Key fields of application are:

• Medical equipment: monitoring in dialysis and biomedical machines.
• Analytical instruments: reliable flow detection for samples and reagents.
• Laser cooling: protection of small cooling circuits.
• Pollution sampling: checking constant suction in measuring equipment.

Operation and reliability

The LPH flow switch works on the basis of a magnetic piston that responds to minimal pressure differences:

1. Activation: when the flow through the unit rises, the magnetic piston moves up at the calibrated switch point.
2. Switching: the magnet activates a hermetically sealed reed switch, fully moulded into the housing outside the liquid path.
3. Deactivation: as soon as the flow drops below the switch point, the switch drops out immediately (snap action), giving a reliable signal to the control system.

Technical specifications LPH series

Installation and custom work

The LPH flow switch must be mounted vertically for correct operation. For systems working with ultra-high-purity gases, we also offer a special version. Do you have questions about the right calibration for your specific gas or liquid? We are happy to help you select the right model and material. You can also visit the website of our partner ChemTec for more information.