LPH UHP 250/375 Series flow switch

LPH UHP flow switch: integrity for ultra-high-purity gases

When working with ultra-high-purity gases, the integrity of every component is vital. The LPH UHP flow switch (250/375 series) is specifically developed to monitor flow conditions without contaminating the medium. Thanks to the "no seals" design and high-grade choice of materials, this is the standard for critical process environments.

Why choose the LPH UHP series?

The LPH UHP flow switch combines a compact design with extreme leak tightness and purity. This makes the monitor indispensable for:

• Semiconductor industry: monitoring of specialist process gases.
• Gas cabinets: safe detection of high/low flow conditions.
• Pharmaceutical industry: applications where contamination must be ruled out.
• Laboratories: accurate monitoring of high-purity gas flows.

Operation and superior finish

The LPH UHP flow switch works on an extremely accurate mechanical principle:

1. Flow detection: a magnetic piston responds to the pressure difference as flow increases.
2. Purity: the internal finish is electropolished (EP) to minimise particle shedding and eliminate dead spaces.
3. Leak tightness: every unit undergoes an inboard leak check (1 x 10(-9) atm ccHe/sec inboard) to guarantee the highest safety.

Technical specifications LPH UHP 250/375

Engineering and installation

The LPH UHP flow switch must be mounted vertically with the inlet port facing down. Thanks to the tube stub connections, the monitor can be integrated seamlessly into high-grade stainless steel piping systems using orbital welding or compression fittings.

Do you have specific questions about the flow curves for nitrogen or other process gases? Our specialists are happy to support you with the right sizing for your UHP system. You can also visit the website of our partner ChemTec for more information.