Vacuum Measurement

Product catalog summary

Introduction
This document provides comprehensive details on vacuum measurement devices by MDC Vacuum Products Corporation, covering specifications, operational principles, and mounting options for various gauges used in vacuum systems.

Bourdon Gauge
Bourdon gauges measure true pressure via the deflection of a Bourdon tube, suitable for rough vacuum measurements from 30 inches of mercury to 30 psig. They are available with Del-Seal™ CF metal seal flanges, Kwik-Flange™ ISO KF flanges, and male NPT pipe thread fittings.

Thermocouple Gauge Tubes
These tubes offer fast and reliable vacuum measurements from 1 to 1x10^-4 Torr, operating on the thermal conductivity principle. It is crucial to match these tubes with the control instruments' specifications.

Glass Enclosed Ionization Gauge Tube
Designed for high and ultrahigh vacuum measurements between 1x10^-3 to 2x10^-10 Torr, these tubes use a heated filament to emit electrons, ionizing air molecules for vacuum measurement.

Nude Ionization Gauge Tube
Similar to glass enclosed tubes, these are for high and ultrahigh vacuum measurements, allowing easy filament replacement and are bakeable to 450°C. Available in resistive heating or electron bombardment degas styles.

Specifications and Features
The document details specifications for each gauge type, including vacuum range, construction materials, and operational parameters. It includes cross-reference tables for tube interchangeability with other manufacturers.

Conclusion
MDC Vacuum Products offers a wide range of vacuum measurement solutions with specific features and mounting options for various vacuum technology applications.

Operating Specifications
- Collector: 0 Volts DC
- Grid: +180 Volts DC
- Filament: +30 Volts DC
- Filament Voltage: 3 - 4.5 Volts
- Filament Current: 2 - 4 Amps
- Degas by EB: 30-40 Watts
- Emission: 4 mA
- Maximum Bakeout Temperature: 450°C

Product Features
- High Temperature and UHV compatible
- Del-Seal™ CF flange
- Stainless steel construction

Replacement Parts
- Twin Tungsten Filament, UHV Gauge Tube: Part Number 432004
- Replacement Filament for 432004: Part Number 432005
- Twin Iridium Filament, UHV Gauge Tube: Part Number 432006
- Replacement Filament for 432006: Part Number 432007

Vacuum Specifications
- Vacuum Range: 10^-3 to 2x10^-10 Torr
- Maximum Operating Pressure: 1x10^-3 Torr
- Pumping Speed (Ionic): 0.06 liters/sec - N2 (1 mA)
- X-ray Limit: 2x10^-10 Torr - N2 (approx.)

Construction Specifications
- Envelope: Nonex
- Grid: "Non-Sag" Tungsten 0.025" dia.
- Filament: Hairpin thoria-coated iridium
- Collector: Tungsten, 0.010" dia.
- Shield Coating: Platinum, internally connected to filament
- Base Leads: Soft Nickel, 0.060" dia.
- Collector Lead: Soft Nickel, 0.040" dia.
- Internal Volume: 220cc (not including tubulation)

Operating Ratings
- Collector: 0 Volts DC (ground)
- Shield: Internally connected to filament
- Grid: +150 Volts DC to ground
- Filament: +30 Volts DC to ground
- Filament Volts (AC): 4.0 Volts
- Filament Current (AC): 3.5 Amps (1 mA grid current)
- Absolute Max. Fil. Volts (AC): 6.0 Volts
- Absolute Max. Fil. Current (AC): 6.0 Amps
- Absolute Max. Fil. Temperature: 1400°C

Interchangeability
Several MDC tubes can interchange with models from other manufacturers, though pin-out dimensions may vary.

Catalog excerpts

Introduction Bourdon Gauge Thermocouple Gauge Tubes > 288 290 Introduction291 Del-Seal > CF Mount293 VCR > ٮ Mount293 NPT Mount293 Ionization Gauge Tubes Nude IGT294 Glass Envelope IGT298 > 287 size="-1">

Open the catalog to page 1

MDC nude ionization gauge tubes aredesigned for high and ultrahigh vacuum measurements between 1x10 Nude Ionization Gauge Tube > MDC 03 Section 4 9/27/03 1:34 PM Page 289 measurements between 1x10 > -3 to 2x10 > -10 Torr.Glass enclosed ionization tubes,commonly referred to as a Bayard-Alpert gauge tubes,consist of several components including a resistive filament,a positively charged grid and a negatively charged collector.The resistive filament is heated to incandescence for the purpose of emitting electrons.The grid,a positively charged wire,coiled in the shape of a spiral,attracts and accelerates...

Open the catalog to page 3

ULTRAHIGH & HIGH VACUUM SERIES Features ■ 0.1 micron to 1000 micron Hg range ■ UHV and HV tubes ■ Interchangeable with other brands ■ Choice of connectors > Thermocouple Gauge Tubes Vacuum Measurement Thermocouple Gauge Parts Simplified TGT-2AM shown General Description > MDC Thermocouple Gauge Tubes offer a fast and reliable means ofmeasuring vacuum from 0.1 to 1000 micron Hg.They can be read continuously and remotely under severe operating conditions.Individual thermocouple gauges operate with specific heater currentratings.Gauge tubes must be matched to the instruments specifi- cations.Refer...

Open the catalog to page 5

Nude Ionization Gauge Tubes Vacuum Range 10 > -3 to 4x10 > -10 Torr > -3 Vacuum Measurement Maximum Operating Pressure 1x10 Torr Sensitivity 20% 10 Torr X-ray Limit 4x10 > -10 Torr > Single Filament Dual Filament Collector Filament Grid Filament Common Flange 304ss Grid Molybdenum-clad Platinum > Grid Filament Single:Iridium > Internal connection Dual:Tungsten Collector Tungsten Shield Coating Platinum > Collector Filament 1 Base Leads Soft Nickel,0.060" dia. Collector Lead Soft Nickel,0.040" dia. > Grid Filament Common Grid Filament 2 Collector -30 Volts DC Grid +150 Volts DC Filament +30 Volts...

Open the catalog to page 8

Ionization Gauge Tubes -3 -11 Vacuum Measurement Vacuum Range 10 to 2x10 Torr Maximum Operating Pressure 1x10 > -3 Torr > Sensitivity 20% 25 Torr X-ray Limit 2x10 > -11 Torr > Dual Filament Flange 304ss > Collector Filament 1 Grid Tungsten > Grid Filament Dual:Tungsten or Iridium > Filament Common Collector Tungsten Shield Coating Platinum Base Leads Soft Nickel,0.060" dia. > Grid Filament 2 Collector Lead Soft Nickel,0.040" dia. > Collector 0 Volts DC Grid +180 Volts DC > ѕAll pins 0.060 diameter Requires minimum 1.37" I.D.clearance for installation Filament +30 Volts DC Filament Voltage 3 -...

Open the catalog to page 10

Side Arm Glass Envelope Ionization Gauge Tubes Collector lead Vacuum Range 10 > -3 to 2x10 > -10 Torr Maximum Operating Pressure 1x10 > -3 Torr > Vacuum Measurement Pumping Speed (Ionic) 0.06 liters/sec - N > 2 (1 mA) X-ray Limit 2x10 > -10 Torr - N > 2 (approx.) > 5.25nominal Envelope Nonex Grid "Non-Sag"Tungsten 0.025" dia. > 3.25or3.38nominal Filament Hairpin thoria-coated iridium Collector Tungsten,0.010" dia. Shield Coating Platinum,internally connected to filament Base Leads Soft Nickel,0.060" dia. Collector Lead Soft Nickel,0.040" dia. > Filament leads Internal Volume 220cc (not including...

Open the catalog to page 12

Vacuum Measurement

Vacuum Measurement

Catalog excerpts

All MDC vacuum products catalogs and technical brochures