Hot Ionization Gauges

BAG05x

Bayard-Alpert passive gauge heads for VGC083

Drop-in Options

Revolutionize your vacuum gauge experience with us!

The hot cathode ionization passive vacuum gauge heads BAG05x are nude (BAG050, BAG051) or glass tube (BAG052, BAG053) Bayard-Alpert sensors designed for use with the Vacuum Gauge Controller VGC083A/B.

BAG050 is an electron bombardment (EB) degas nude ionization vacuum gauge capable of UHV pressure measurement as low as 2×10^-11 mbar.
BAG051 is a resistive (I²R) degas nude ionization vacuum gauge capable of pressure measurement as low as 5×10^-10 mbar.
BAG052 and BAG053 are resistive degas (I²R) glass enclosed ionization vacuum gauges capable of pressure measurement as low as 5×10^-10 mbar.

Ytrium oxide coated iridium filaments are offered for general vacuum applications where air and inert gases, such as N₂ and argon, are present. Tungsten filaments are offered for specific applications where yttrium oxide coated iridium filaments are not compatible. The BAG05x gauge heads are designed for low outgassing vacuum systems and can be baked up to extreme high temperature (450 °C). BAG05x gauges are largely compatible and may be operated with other user-selected compatible vacuum gauge controllers.

Advantages

Long standing, reliable and proven gauge head design
Drop-in replacement for most nude hot ion gauge heads
Wide range of emission currents (100 μA to 10 mA)
Available with single/dual yttrium oxide coated iridium and dual tungsten filament cathode assemblies
Degas: all models can be degassed using in electron bombardment (EB), BAG051, BAG052 and BAG053 can also be degassed using resistive degas (I²R)

Typical applications

Industrial or R&D applications requiring precise vacuum measurement in the high/ultra-high vacuum range and high temperature bake-out

Operating Units

Vacuum Gauge Controller VGC083A/B

Specifications

BAG050

BAG051

BAG052

BAG053

Measurement principle	Bayard-Alpert, hot cathode ionization
Gauge type	Electron bombardment (EB) degas nude gauge
Measurement range	2.7×10^-11 ... 1.3×10^-3 mbar
Accuracy (N₂)	±20 % of reading
Repeatability (N₂)	±5 % of reading
Feedthrough	Al₂O₃ceramic
Bake-out temperature	≤450°C
Materials exposed to vacuum	Stainless steel, Al₂O₃, W, Y₂O₃
Features	Available with following filament options: - Dual, Y₂O₃ coated iridium (Ir) - Dual, tungsten (W)

Measurement principle	Bayard-Alpert, hot cathode ionization
Gauge type	Resistive (I²R) degas nude gauge
Measurement range	5.3×10^-10 ...1.3×10^-3 mbar
Accuracy (N₂)	±20 % of reading
Repeatability (N₂)	±5 % of reading
Feedthrough	Al₂O₃ceramic
Bake-out temperature	≤450°C
Materials exposed to vacuum	Stainless steel, Al₂O₃, W, Y₂O₃
Features	Available with following filament options: - Single, Y₂O₃ coated iridium (Ir) - Dual, Y₂O₃ coated iridium (Ir) - Dual, tungsten (W)

Measurement principle	Bayard-Alpert, hot cathode ionization
Gauge type	Resistive (I²R) degas glass enclosed gauge
Measurement range	5.3×10^-10 ... 1.3×10^-3 mbar
Accuracy (N₂)	±20 % of reading
Repeatability (N₂)	±5 % of reading
Feedthrough	glass
Bake-out temperature	≤450°C
Materials exposed to vacuum	Glass, Al₂O₃, W, Y₂O₃
Features	Single Y₂O₃ coated iridium (Ir) filament

Measurement principle	Bayard-Alpert, hot cathode ionization
Gauge type	Resistive (I²R) degas glass enclosed gauge
Measurement range	5.3×10^-10 ... 1.3×10^-3 mbar
Accuracy (N₂)	±15 % of reading
Repeatability (N₂)	±5 % of reading
Feedthrough	glass
Bake-out temperature	≤450°C
Materials exposed to vacuum	Glass, Al₂O₃, W, Y₂O₃
Features	Available with following filament options: - Dual, Y₂O₃ coated iridium (Ir) - Dual, tungsten (W)

Part number

Accessories

	BAG050
399-720	BA nude EB-degas, DN40CF, dual iridium filament (Ir)
399-721	BA nude EB-degas, DN40CF, dual tungsten filament (W)
399-730	Spare dual iridium filament (Ir)
399-731	Spare dual tungsten filament (W)

	BAG051
399-725	BA nude I2R, DN40CF, single iridium filament (Ir)
399-726	BA nude I2R, DN40CF, dual iridium filament (Ir)
399-727	BA nude I2R, DN40CF, dual tungsten filament (W)
399-735	Spare V-iridium filament (Ir)
399-736	Spare dual iridium filament (Ir)
399-737	Spare dual tungsten filament (W)

	BAG052
399-740	BA glass I2R, ¾’’ Kovar metal inlet port, single iridium filament (Ir)
399-741	BA glass I2R, 1’’ Kovar metal inlet port, single iridium filament (Ir)
399-742	BA glass I2R, ¾’’ glass inlet port, single iridium filament (Ir)
399-743	BA glass I2R, 1’’ glass inlet port, single iridium filament (Ir)
399-744	BA glass I2R, DN 25 ISO-KF, single iridium filament (Ir)
399-745	BA glass I2R, DN 40 ISO-KF, single iridium filament (Ir)
399-746	BA glass I2R, DN 16 ISO-CF, single iridium filament (Ir)
399-747	BA glass I2R, DN 40 ISO-CF, single iridium filament (Ir)

	BAG053
399-750	BA glass I2R, ¾’’ Kovar metal inlet port, dual tungsten filament (W)
399-751	BA glass I2R, 1’’ Kovar metal inlet port, dual tungsten filament (W)
399-752	BA glass I2R, ¾’’ glass inlet port, dual tungsten filament (W)
399-753	BA glass I2R, 1’’ glass inlet port, dual tungsten filament (W)
399-754	BA glass I2R, DN 25 ISO-KF, dual tungsten filament (W)
399-755	BA glass I2R, DN 40 ISO-KF, dual tungsten filament (W)
399-756	BA glass I2R, DN 16 ISO-CF, dual tungsten filament (W)
399-757	BA glass I2R, DN 40 ISO-CF, dual tungsten filament (W)

	Cables to VGC083A
	to BAG050 50 °C
399-780	3 m (9 ft)
399-781	8 m (25 ft)
399-782	15 m (50 ft)

	to BAG050 200°C
399-770	3 m (9 ft)
399-771	8 m (25 ft)
399-772	15 m (50 ft)
399-779	Touch protection cover for cables 200 °C (BAG050, BAG051)

	Cables to VGC083B
	to BAG051 50°C
399-780	3 m (9 ft)
399-781	8 m (25 ft)
399-782	15 m (50 ft)

	to BAG051 200°C
399-770	3 m (9 ft)
399-771	8 m (25 ft)
399-772	15 m (50 ft)
399-779	Touch protection cover for cables 200 °C (BAG050, BAG051)

	to BAG052/053 50°C
399-790	3 m (9 ft)
399-791	8 m (25 ft)
399-792	15 m (50 ft)

Downloads

Datasheets

Bayard-Alpert Gauges BAG05x

pdf • 7,0 MB • English • Datasheets

Manual

Operating Manual Vacuum Gauge Controller VGC083A, VGC083B

pdf • 3,0 MB • English

Brochure

Brochure Passive Vacuum Gauge Controller & Sensor Heads

pdf • 2,1 MB • English • Brochures

Hot Ion Gauge Brochure

pdf • 2,5 MB • English • Brochures

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Advantages

Typical applications

Operating Units

Specifications

Part number

Downloads

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