HH-201 Series | Digital Pressure Switch for Pneumatic Systems

▸ Product Introduction

The HH-201 Series Digital Pressure Switch is an intelligent and compact device engineered to provide precise measurement and control of air and non-corrosive gas pressure. It serves as a critical component in any automated system, from monitoring assist gas in laser cutting applications to confirming clamping pressure in CNC fixtures.

The switch features a bright, easy-to-read dual-screen display that shows both the real-time pressure value and the setpoint simultaneously. Its high-resolution sensor ensures reliable monitoring, while the dual switch outputs (available in NPN or PNP configurations) allow for precise process control based on user-defined pressure thresholds. Built for industrial environments, the HH-201 is CE certified and designed for long-term, stable operation.

▸ Product Features

✅ High Precision & Repeatability: 

With an accuracy of ±1% F.S. and a repeatability of ±0.2% F.S., the HH-201 provides reliable and consistent readings for dependable process control.

✅ Clear Dual-Screen Digital Display: 

The intuitive display shows the current pressure and setpoint at a glance, with a high resolution of 0.001MPa for high-pressure models and 0.1KPa for low-pressure models.

✅ Flexible 360° Rotatable Body: 

The main body can be rotated a full 360° after installation, allowing for optimal viewing angles and easy wiring, even in tight or confined spaces.

✅ Versatile Output & Connection Options:

• • Outputs: Available in both NPN and PNP configurations to match any PLC or control system requirement.
  • Connections: Offered with various process connection types, including quick-connect interfaces for 4mm or 6mm tubing and standard 1/5″ threaded ports (compatible with R1/8, R1/4, and other sizes via adapters).

✅ Robust and Certified: 

Engineered for industrial use and fully CE certified, guaranteeing quality and safety standards.

✅ OEM/ODM Customization Available: 

We support OEM and ODM requests for customized branding, features, or configurations to meet specific application needs.

▸ Product Parameters

> Industry Applications

The HH-201 Series is essential for any application requiring precise pneumatic pressure monitoring and control:

• • ◆  Laser Cutting Machines: Monitoring the pressure of assist gases like Oxygen, Nitrogen, and Air to ensure optimal cut quality.

  • ◆  Industrial Automation: Actuating pneumatic cylinders, grippers, and vacuum systems in robotic cells and assembly lines.

  • ◆  Pneumatic Clamping & Fixturing: Confirming that workpieces are securely clamped before machining begins.

  • ◆  Semiconductor Manufacturing: Precise pressure control in fabrication and testing equipment.

  • ◆  Packaging Machinery: Monitoring air pressure in sorting, sealing, and labeling machines.

  • ◆  Leak Detection Systems: Setting high and low pressure thresholds to detect leaks in sealed components.

> Frequently Asked Questions (FAQ)

Q: How do I choose between an NPN and a PNP output type?

A: The choice depends on your PLC (Programmable Logic Controller) or control device’s input card.

• • NPN (Sinking): The switch output connects the signal line to Ground (0V) when activated. This is common for control systems made in Asia.

  • PNP (Sourcing): The switch output connects the signal line to the Positive Supply Voltage (+V) when activated. This is the more common standard in Europe and North America.

Recommendation: Always check the specifications of your PLC’s input module. If you are connecting directly to a relay or solenoid valve without a PLC, either type can typically be used, but you must wire it correctly according to the component’s requirements.