Compare Model Drawings, CAD & Specs Fitting Type Digital Communication Display Availability Price
355 micro-ion hot cathode vacuum transducer
Hot Cathode Vacuum Transducer, Yttria, NW25 ISO-KF, Analog
$967
NW25 ISO-KF No No
355 micro-ion hot cathode vacuum transducer
Hot Cathode Vacuum Transducer, Yttria, NW25 ISO-KF, RS485, 1 Relay
$1,167
NW25 ISO-KF RS485 No
Hot Cathode Vacuum Transducer, Yttria, NW25 ISO-KF, DeviceNet, 2 Relays
$1,287
NW25 ISO-KF DeviceNet No
355 micro-ion hot cathode vacuum transducer
Hot Cathode Vacuum Transducer, Display, Yttria, NW25 ISO-KF, Analog
$1,180
NW25 ISO-KF No 2-digit plus exponent green LED
Hot Cathode Vacuum Transducer, Display, Tungsten, 2.75 in. CF, DeviceNet, 2 Relays
$1,534
2.75 in. CF DeviceNet 2-digit plus exponent green LED
Hot Cathode Vacuum Transducer, Display, Yttria, NW25 ISO-KF, DeviceNet, 2 Relays
$1,500
NW25 ISO-KF DeviceNet 2-digit plus exponent green LED

Configuration Options

Description
  355 micro-ion hot cathode vacuum transducer 355 Hot Cathode Vacuum Transducer, Series 355

Specifications

  • Type
    Vacuum Transducer
  • Sensor
    Hot Cathode
  • Display
    2 digits plus exponent, green LED (optional)
  • Measurement Range
    1 x 10-9 to 5 x 10-2 Torr
    1 x 10-9 to 7 x 10-2 mbar
    1 x 10-7 to 7 Pa
    (N2 or air)
  • Operating Temperature
    0° to 40°C
  • Maximum Bakeout Temperature
    200°C maximum (with electronics removed)
  • Storage Temperature
    -40° to 70°C
  • Analog Output
    1 Volt/decade, logarithmic, 0 to 9 V
  • Power Requirements
    24 VDC ±15%, 12 W max
  • Internal Volume
    10.8 cc
  • Exposed Materials
    304 stainless steel, alumina, tantalum, tungsten, CuAg eutectic, Kovar
  • Electronic Casing and Flange
    Aluminum extrusion
  • Weight
    370 gm (12 oz) with NW16 KF flange
  • Compliance
    CE, SEMI S2
  • Filament
    yttria-coated iridium or tungsten
  • Connectors
    9-pin Type "D" male
  • Overpressure Protection
    Gauge turns off at factory set upper pressure limit (adjustable)
  • Emission Current
    0.02 mA, 1.0 mA, or 4 mA
  • Degas
    Electron bombardment, 3 W with 2-minute timer
  • Remote Input Signals
    Filament on/off, degas on/off and emission current are set by continuity to ground
  • Remote Output Signals
    Filament and degas on/off status are determined by an open collector transistor

Features

Dual Filaments

Dual, burn-out resistant yttria-coated iridium filaments provide long gauge life. Unscheduled downtime is avoided by using the second filament as a back-up until the gauge can be replaced during regular maintenance procedures.

Ultra-Clean Construction

Micro-Ion gauges are designed, constructed, and processed to minimize outgassing. All components are vacuum fired and assembled in a Class 100 cleanroom environment. This assures rapid, repeatable response during vacuum chamber pumpdown.

Analog Output Version

The basic transducer version provides an easy-to-use analog output signal that is linear with the logarithm of the pressure. An optional large green LED display provides point-of-use pressure indication.

Analog Output Signal

Digital Interface Version

Transducers are available with an RS-485 or DeviceNet interface for easy compatibility with computer controlled processes. The digital interface versions have a set point relay allowing for control of other vacuum equipment or to provide a safety interlock.

Replacement Gauge

355 Micro-Ion® hot cathode vacuum transducers features a unique, no tools required detachable vacuum gauge.  Please see 355 Micro-Ion® Hot-cathode Bayard-Alpert Vacuum Sensors for more information

Cooler Operation

At only 8% of the power consumption of a glass or nude gauge, the Micro-Ion gauge generates much less heat, minimizing the disruption to a process or experiment.

DeviceNet™ Interface Version Pinouts

Analog Output Version Pinouts

RS485 Version Pinouts

Need help?

Contact an Applications Specialist by sending us an email