937B Controller Instruction Manual
pg. 11
Convectron
304 stainless steel, borosilicate glass, Kovar®, Alumina,
NiFe alloy, polyimide
CM
Inconel
®
Internal volume
8
CC
Series 431 and 422 - 1.8 in
3
(30 cm
3
)
Series 423 - 0.9 in
3
(15 cm
3
)
HC
Low power nude tube
– zero
Mini BA - 1.4 in
3
(23 cm
3
)
Pirani
0.5 in
3
(8 cm
3
)
CP
2.0 in
3
(33 cm
3
)
Convectron
2.2 in
3
(35 cm
3
)
CM
Approximately - 0.38 in.
3
(6.3 cm
3
). Exact volume depends on the
Series of CM in use.
Operating temperature range
CC
Series 431 - 0° to 70°C (32° to 158°F)
Series 422--Versions available that operate up to 250°C
Series 423 - 0° to 70°C (32° to 158°F)
HC & Pirani
0° to 50°C (32° to 122°F)
CP
10° to 50°C (50° to 122°F)
CM
0° to 50°C (32° to 122°F)
Maximum sensor bakeout temperature (without cables)
CC
Series 431
– 250°C (482°F) when backshell subassembly
removed, otherwise 125°C (257°F)
Series 423
– 400°C (752°F) CF flange version only with magnet
removed.
Series 422 versions bakeable and operable to 250°C are
available.
HC
60
o
C (104°F) with cable attached
300
o
C (572°F) max with CF and cable removed
150
o
C (302°F) with KF and Viton
®
seal and cable removed
Pirani
50°C (122°F)
CP
100°C (212°F) plastic shell internally coated for RF shielding
250°C (482°F) on aluminum housing for RF shielding version.
Convectron
150°C (302°F)
CM
N/A
Hot cathode sensitivity
LPN
9 Torr
-1
(
20%)
Mini BA
12 Torr
-1
(
20%)
8
Volume will vary with the type of vacuum connection selected