• The Pfeiffer Vacuum IMR 265 Compact Process Ion Gauge has been designed for vacuum measurement of non-flammable gases and gas mixtures. It must not be used for measuring flammable or combustible gases in mixtures containing oxidants (e.g. atmospheric oxygen) within the explosion range.

• The Pfeiffer IMR 265 Gauge is a part of the Pfeiffer Vacuum Compact Gauge family and can be operated in connection with a Pfeiffer Vacuum measurement and control unit for Compact Gauges or with another control device. Over the entire measuring range, the measuring signal is displayed in the form of output as a logarithm of the pressure.

• The IMR 265 functions with an HP high pressure hot cathode ionization manometer, which is controlled by the built-in Pirani manometer (control range). The hot cathode manometer is only switched on for pressure ranges below the maximum threshold of 5 × 10^[-2] mbar, in order to prevent potential filament burnout. For pressures above this threshold, the Pirani signal is utilized exclusively for output.

Specifications:

• Output signal: Measuring range hot cathode 1.5 – 7.5 V
• Output signal: Measuring range Pirani 8.5 – 9.75 V
• Output signal: Minimum load 10 kΩ
• Bakeout temperature Electronics removed 150 °C
• Pressure max. 5000 hPa
• Electron absorber Stainless steel
• Flange, material Stainless steel
• Precision: 1 · 10^-5 – 1 hPa ± 15 %
• Weight 315 g
• Filament Iridium coated with Y2O3
• Output signal: Measuring range hot cathode 1.5 – 7.5 V
• Output signal: Measuring range Pirani 8.5 – 9.75 V
• Output signal: Minimum load 10 kΩ
• Bakeout temperature Electronics removed 150 °C
• Pressure max. 5000 hPa
• Electron absorber Stainless steel
• Flange, material Stainless steel
• Precision: 1 · 10^-5 – 1 hPa ± 15 %
• Weight 315 g
• Filament Iridium coated with Y2O3
• Temperature: Storage -20 – 70 °C
• Ambient temperature 0 – 50 °C
• Supply: Voltage V DC 20 – 30 V DC
• Supply: consumption max. 16 W