Passive Gauges
Edwards is proud to introduce our new range of passive gauge heads and controllers, selected specifically to complement the current Edwards range of active gauges and controllers. These passive gauges offer a solution for measuring pressure in a wide range of applications, from UHV systems to process industries or wherever the use of an active gauge is not possible e.g. Cyclotrons.
The Edwards range of passive gauges comprises of Pirani, Penning and both Bayard-Alpert and ExtractorIon gauge heads which together can measure from atmosphere down to 10⁻¹²mbar. These are used inconjunction with a Passive gauge controller (PGC) to display pressure and offer an intuitive interface for theuser alongside the ability to control remotely. Edwards will offer 2 controller variants; the PGC201 which
covers the Pressure range of 10⁻⁹ to 1000 mbar, in conjuction with Pirani and Penning gauges, and thePGC202 which covers the wider range of and 10⁻¹² to 1000 mbar when used with a Pirani and Ion gauge.
Pirani Gauge Sensors
(Thermal Conductivity Technology)
Measurement range
Filament
Permissible overload (abs.), max.
Vacuum connection
Materials in contact with the medium
mbar
bar
PRG20K - NW16
5 x10⁻⁴ to 1000
Tungsten
3
NW16
Aluminum, Vacon, Glass, Tungsten, CrNi 8020 Nickel plated steel, epoxy adhesive
PRG20K - DN16CF
5 x10⁻⁴ to 1000
Tungsten
10
DN16CF
Stainless steel, Vacon, Tungsten, CrNi 8020 ceramics, Al2 O3 , NiFe 42
PRG20KCR - NW16
5 x10⁻⁴ to 1000
Platinum
10
NW16
Stainless steel 1.4301 (SS 304), Al2 O3 , CrNi 8020, Platinum
Penning Gauge Sensors
(Cold Cathode Ionisation Technology)
Measurement range
High voltage supply (anode potential)
Trigger voltage
Operation voltage
Materials in contact with the medium
mbar
kV
kV
Vacuum connection
CPG35K NW25
1 x 10⁻⁹ to 10⁻²
3.3
1.6
Stainless steel, Nichrome, Ceramics, Titanium
NW25
CPG35K NW40
1 x 10⁻⁹ to 10⁻²
3.3
1.6
Stainless steel, Nichrome, Ceramics, Titanium
NW40
CPG35K DN40CF
1 x 10⁻⁹ to 10⁻²
3.3
1.6
Stainless steel, Nichrome, Ceramics, Titanium
DN40CF
CPG35KB DN40CF
1 x 10⁻⁹ to 10⁻²
3.3
1.6
Stainless steel, Nichrome, Ceramics, Titanium
DN40CF
Ion Gauge Sensors
(Hot Cathode Ionisation Technology)
Technical data
Measurement range
X-ray limit
Material
Cathode
Anode
Collector
Reflector
Sensitivity for nitrogen
Vacuum connection
mbar
mbar
mbar-1
IG40 BA
2 x 10⁻¹¹ to 10⁻²
≤10⁻¹¹
Iridium with yttrium oxide coating
Pt/Ir 90/10 and Mo/pt wrapped wire
Tungsten
17.0
DN40CF
IG40 EX
2 x 10⁻¹² to 10⁻⁴
≤10⁻¹²
Iridium with yttrium oxide coating
Mo and CoNiCr
Tungsten
NiFe
6.25
DN40CF
Edwards PGC201 controller covers the pressure range between 10⁻⁹ and 1000 mbar by combining two measurement principles from the PRG and CPG gauges. The PGC202 combines PRG gauges and IG40 BA or IG40 EX gauges for measurements of vacuum pressures in the range between 10⁻¹² and 1000 mbar. Both these controllers provide monitoring and control functions for the connected gauges.
Technical Data
Measurement range
Channel 1, 2 (PRG)
Channel 3
(CPG)
(IG40 BA)
(IG40 EX)
Measurement uncertainty
PRG
CPG
IG40 BA/EX
Adjustable switching thresholds
PRG
CPG
IG40 BA
IG40 EX
Power Consumption
mbar
mbar
mbar
mbar
mbar
mbar
mbar
mbar
W
Pirani/Penning Controller PGC201
5 x 10-4 to 1000
10-9 to 10-2
-
-
≤20% of the measured value in the range 10⁻³ to 10⁻² mbar (± 20%) in the range 10⁻² to 10² mbar (± 15%)
± 30% of the measured value in the range 10⁻⁸ to 10⁻⁴ mbar
5x10⁻³ to 500
1x10⁻⁸ to 9.9x10⁻³
<10
Pirani/Ion Controller PGC202
5 x 10-4 to 1000
-
2 x 10-11 to 10-2
2 x 10-12 to 10-4
≤20% of the measured value in the range 10⁻³ to 10⁻² mbar (± 20%) in the range 10⁻² to 10² mbar (± 15%)
+/- 2% of the measured value
5x10⁻³ to 500
1x10⁻⁸ to 5x10⁻³
1x10⁻¹¹ to x10⁻¹¹
<60
Penning cold cathode operation (PGC201)
UHV sensors either Bayard-Alpert measurement system IG40 BA or extractor measurement System IG40 EX (PGC202)
