Pfeiffer Vacuum IMR 265, Dual Sensor (Pirani and Hot Cathode), DN 25 ISO-KF Flange

The Pfeiffer Vacuum IMR 265 is a compact process ion gauge designed for accurate vacuum measurement across a wide pressure range. By combining Pirani and hot cathode sensors, it ensures precise monitoring from high to ultra-high vacuum levels. The device intelligently controls the activation of the hot cathode sensor based on pressure thresholds to extend filament life and enhance measurement reliability. Its corrosion-resistant construction and compatibility with various control units make it a versatile choice for diverse vacuum applications.​

Key Features:

• Dual Sensor Design: Integrates both Pirani and hot cathode sensors within a single compact unit, providing a broad measurement range from 2×10⁻⁶ hPa to 1000 hPa.​
• Automatic Sensor Control: The hot cathode sensor is activated only below a user-defined pressure threshold (factory set at 5×10⁻² hPa) to prevent filament burnout, while the Pirani sensor monitors higher pressures.​
• High Measurement Accuracy: Offers precise pressure readings across its entire range, suitable for various vacuum applications.​
• Corrosion-Resistant Construction: Built with materials resistant to corrosion, ensuring durability and reliability in demanding environments.​
• Compact and Versatile: Its design allows for easy integration into existing systems, compatible with Pfeiffer Vacuum measurement and control units or other control devices.​
• User-Adjustable Thresholds: Features five definable switching thresholds for the hot cathode activation, allowing customization based on specific process requirements.​

Additional Specifications:

• Measurement Range: 2×10⁻⁶ hPa to 1000 hPa
• Sensor Type: Dual Sensor (Pirani + Hot Cathode Ionization)
• Flange Type: DN 25 ISO-KF
• Output Signal: 0 to 10.2 V analog output
• Supply Voltage: 20 to 30 VDC
• Max Operating Pressure: 500 kPa absolute
• Operating Temperature Range: 0 °C to +50 °C
• Materials in Vacuum Path: Stainless Steel, Molybdenum, Iridium, Glass, Tungsten