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SRS Bayard-Alpert Ionisation Gauges

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Product Code:
Ionisation Gauges
Manufacturer: Stanford Research Systems
As low as £150.35 £180.42 Regular Price £186.00

SRS nude and glass tubulated ionisation gauges

  • Nude gauges
  • Glass gauges
  • Nude-UHV gauges

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Stanford Research System (SRS) offers three types of gauges for the IGC100 Ion Gauge Controller: glass tubulated, nude, and nude-UHV Bayard-Alpert ionisation gauges. We also supply convection enhanced Pirani gauges. All single, hair-pin shaped filaments used in SRS gauges are spring tensioned to eliminate filament sag. This allows the user to mount the gauge in any orientation. Dual-filament assemblies provide security against filament burnout.

Product #

Available Bayard-Alpert Ionization Gauges

GR-100F

2.75" CF, 1" side tube, single filament, ThO2/Ir

GW-100F

2.75" CF, 1" side tube, dual filament, tungsten

NR-F

Nude, bi-filar helix grid, dual filament, ThO2/Ir

NR-F-UHV

Nude, closed cage grid, dual filament, ThO2/Ir

NW-F-UHV

Nude, closed cage grid, dual filament, tungsten

Bayard-Alpert Gauge Model Number/Selection and Cross-Reference Table

Type

Description

Pin
Config/
SRS
Cable#

SRS
Part#

Granville
-Phillips

ETI

Duniway
Stockroom

Kurt J.
Lesker

Varian

Glass
Tubulated

Connection

Filament
Material

 

Type

Diameter

(count)

2.75"
Conflat®
Flange

1 in.
side
tube

ThO2/Ir
(single)

Fig. 1

GR-100F

274008

4336F/1

I-CFF-275

G100F

K2471303

tungsten
(dual)

Fig. 2

GW-100F

274018

4336TF/1

T-CFF-275

G100TF

K7360307

Nude
(2.75" CF
flange)

Range

Anode
Grid

Filament
Material
(count)

 

Std.

Bi-filar
Helix

ThO2/Ir
(single)

Fig. 3

NR-F

274028

8140

I-NUDE-BAC

G8140

L5150-302

UHV

closed
end
cage

ThO2/Ir
(dual)

Fig. 4

NR-F-UHV

274023

8130

I-NUDE-F

G8130

971-5007

UHV

closed
end
cage

tungsten
(dual)

Fig. 4

NW-F-UHV

274022

8130T

T-NUDE-F

G8130T

971-5008


 

Glass Tubulated

Nude

Nude-UHV

Physical Data

Connection

Side tube or 2.75" CF flange

2.75" CF flange

2.75" CF flange

Side tube diameter

0.75" or 1"

N.A

N.A

Side tube material

Pyrex or Kovar (#1)

N.A

N.A

Envelope

Nonex 7720 Glass,
2.25" dia. × 5.25" long

Nude

Nude

Mounting position

Any, vertical preferred (#2)

Any

Any

Collector

Tungsten, 0.05" diameter

Tungsten, 0.05" diameter

Tungsten, 0.05" diameter

Filament

Single ThO2/Ir (#4) or dual tungsten

Single ThO2/Ir (#4), replaceable

Dual ThO2/Ir or dual tungsten, replaceable

Grid

Tungsten, bi-filar helix configuration

Tungsten, bi-filar helix configuration

Tantalum and Pt/Moly support, closed end "squirrel" cage

Overall length, max.

6.0"

4.13"

4.13"

Insertion length, max.

N.A.

3.30"

3.00"

Operating Data

Operating pressure

2 × 10-10 to 10-3 Torr

4 × 10-10 to 10-3 Torr

2 × 10-11 to 10-3Torr

Sensitivity for N2 (nominal)

10/Torr

10/Torr

25/Torr

X-ray limit

2 × 10-10 Torr

4 × 10-10 Torr

2 × 10-11 Torr

Electron bombardment degas,
     Power @500V

70 W (nominal), 100 W (max.)

70 W (nominal), 100 W (max.)

40 W (max.)

Resistance heated degas

6.3 to 7.5 V @ 10 A

6.3 to 7.5 V @ 10 A

N.A.

Bakeout temperature

250 °C

450 °C

450 °C

Electrical Operating Parameters (#3)

Anode grid bias voltage

180 VDC

180 VDC

180 VDC

Collector bias voltage

0 VDC

0 VDC

0 VDC

Filament bias voltage

30 VDC

30 VDC

30 VDC

Filament supply current

4 to 6 A

4 to 6 A

4 to 6 A

Filament supply voltage

3 to 5 VDC

3 to 5 VDC

3 to 5 VDC

 

     

Notes:
1. Glass-to-metal transition
2. Vertical orientation provides strain relief for electrode structures increasing long-term stability
3. Direct current (DC) bias and supply voltages are recommended for all electrical connections.
4. Single filaments are hair-pin shaped and spring loaded to eliminate sagging.

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