Herga Air Pressure & Vacuum Switches

Precision Pneumatic Sensing and Control

The Herga Air Pressure and Vacuum Switches range provides a complete solution for pneumatic detection, monitoring, and control. Designed for medical, industrial, spa, and OEM systems, these switches offer sensitivity, durability, and reliable performance across all pressure and vacuum applications.
From micro PCB-mounted switches to high-current airswitches and industrial-grade differential sensors, Herga delivers engineering precision for every environment.

⚙️ System Integration Overview

🔹 Model 6753 – Low Pressure Airswitch

The 6753 Series is a compact, highly sensitive low-pressure airswitch designed for long tubing systems and low-power applications.

Key Features

• Operates under very low pressure or vacuum

• Optional temperature-compensated versions

• Contact configuration: SPST N/O or N/C

• Gold or silver contacts

• Electrical rating: 0.5A at 250V AC

• Mechanical life: 1 million operations

• Operating range: 5–35 mbar

Applications

• Flow and differential pressure monitoring

• Medical and laboratory instruments

• Pneumatic logic circuits

• Counting and alarm systems

🔹 Models 6861–6869 – Standard Airswitch Range

The 6861–6869 series is Herga’s most popular family of general-purpose airswitches, available in momentary, latching, and dual-pole variants.

Key Features

• Contact types: SPCO or DPCO

• Options: standard, low, and very low pressure

• Back or side 4 mm air spout connection

• Electrical rating up to 21A (2HP at 250V AC)

• Diaphragm materials: Neoprene or Silicone

• Compatible with Herga hand and foot controls

Applications

• Spa and hydrotherapy systems

• Medical beds and chairs

• Industrial pneumatic control

• Dual-channel actuation systems

🔹 Models 6891 & 6893 – PCB Mounting Airswitches

The 6891 (standard) and 6893 (sensitive) switches are miniature PCB-mounted airswitches designed for compact system integration.

Key Features

• Lightweight thermoplastic body (8 g)

• Back or side entry spouts (2 mm or 4 mm)

• SPST N/O contact configuration

• Gold or silver contacts up to 0.5A / 250V AC

• Pressure ranges from 15 to 62 mbar

• Available with temperature-compensated versions

Applications

• Compact medical and dental devices

• Airflow and alarm monitoring

• Pneumatic logic circuits

• OEM PCB-based control assemblies

🔹 Models 6761 & 6763 – PCB Pressure & Vacuum Switches

The 6761 (vacuum) and 6763 (pressure) switches combine small size with high precision, ideal for differential control applications.

Key Features

• Direct PCB solder mounting

• Dual-port design for pressure and vacuum

• SPST N/O gold or silver contacts

• Adjustable setpoint

• Operating range: 15–1000 mbar

• Temperature range: −10°C to +85°C

• Life expectancy: 1 million cycles

Applications

• Airflow and filter monitoring

• Medical diagnostic and breathing systems

• Safety alarms and interlocks

• Differential pressure systems

🔹 Model MPL – Industrial / Medical Pressure & Vacuum Switch

The MPL Series is a robust, long-life switch for pressure, vacuum, or differential sensing in demanding environments.

Key Features

• Pressure range: 0.25 to 1370 mbar

• Contact types: SPDT, SPST N/O, SPST N/C

• Electrical rating: 10–20 mA at 5–24V DC

• Temperature range: −40°C to +85°C

• Body material: glass-filled polyester or aluminium-zinc alloy

• UL and CSA approved

Applications

• HVAC and process control systems

• Medical suction and respiratory monitoring

• Industrial safety systems

• Laboratory and OEM automation