Electronic Pressure Switches & Controllers

High-Precision Digital Monitoring & Process Control

Welcome to the Longvista range of intelligent pressure switches. Designed for the rigorous demands of Swiss industry, our PW Series combines the precision of a digital transmitter with the immediate action of a programmable switch. Whether you are managing pump stations in water treatment, monitoring filters in hydraulic systems, or ensuring safety in chemical processing, our controllers offer the reliability and flexibility required for modern automation.

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Why Choose the PW Series?

330° Rotatable Displays: Most models feature a rotatable meter head, ensuring clear visibility even in the tightest installation spaces.
Dual-Output Capability: Get the best of both worlds—independent switching outputs (PNP/NPN/Relay) plus a continuous 4-20mA analog signal for your PLC.
Rugged Construction: Built with AISI 316L membranes and housing options up to IP67, resistant to vibration and harsh industrial media.
User-Friendly Programming: Field-adjustable setpoints and delay functions allow for on-site calibration without external software.

Comparison: Find the Right Controller for Your Application

Use this table to quickly identify which model fits your system architecture.

Feature	PW219 (Standard)	PW222 (Advanced)	PW221 (High-Res)	PW440 (Multi-Control)
Best For	General Industrial Use	High-End Machinery	Gas-Liquid Systems	Pump & Tank Logic
Display Type	4-Digit LED/LCD	5-Digit OLED	4-Digit LED	4-Digit LED
Output Logic	PNP/NPN or Relay	Dual Switch + Analog	PNP/NPN + Analog	1-5 Relay Points
Body Material	Stainless Steel	Engineering Plastic/SS	Zinc Alloy/SS	Stainless Steel
Rotatable Head	330°	330°	270°	Fixed (Axial/Radial)
Range	Up to 100 MPa	Up to 100 MPa	Up to 1000 Bar	Up to 100 MPa

Detailed Series Overview

PW222 – The Flagship OLED Controller

The PW222 is our most advanced switch, featuring a high-contrast 5-digit OLED display that supports both English and Chinese menus. It is perfect for machine builders (OEMs) who require a high-tech interface and versatile output configurations, including IO-Link and RS485 options.

Unique Value: Automatic control direction recognition and return difference insertion.

PW219 – The Industrial Workhorse

Faithfully serving water treatment and power industries, the PW219 is highly adaptable. It supports silicon piezoresistive, ceramic, or sapphire cores, making it compatible with almost any fluid medium.

Unique Value: Highly customizable process connections including hygienic and differential pressure types.

PW221 – Precision for Hydraulics & Pneumatics

Specializing in oil pressure and gas-liquid dual-use, the PW221 features a zinc alloy shell for extreme durability. The 270° rotating head ensures your maintenance team can always check the status at a glance.

Unique Value: M12 locking connector for high-vibration environments and IP67 protection.

PW440 – The Multi-Point Logic Controller

When you need to control more than just a simple on/off state, the PW440 provides up to 5 independent control points. It acts as a full digital measurement and control center for hydropower and tap water industries.

Unique Value: Available in 220VAC power supply versions with high load capacity (220V/3A).

Technical Consultation & Support

Not sure which output signal (PNP vs. NPN) or process connection (G1/2 vs. 1/4 NPT) is right for your Swiss facility? Our technical team in Ticino is ready to assist you in selecting the optimal configuration for your specific pressure range and medium.

Request a Technical Consultation