Loss of Vacuum and High Vacuum switches, for use with Chlorine gas under vacuum. For monitoring of the systems vacuum condition.

Loss of Vacuum Switch

Loss of Vacuum: switch is designed to provide one normally open and one Normally closed alarm contact in the presence of a loss of vacuum. It should be mounted Vertically as close to the Ejector as practical and -after the gas rate valve. The alarm point is adjustable between 28 and 29 Inches of Mercury to allow the switch to actuate at the Required vacuum.


Contacts rated at 5 A @ 250 Vac or 28 Vdc maximum, (Resistive Load),
Enclosure NEMA 4X.
Dimensions 102 mm W x 94 mm D x 145 mm H.
Weight 2 kg.

High Vacuum Switch

BM5987, High Vacuum switch is designed to provide one normally open and one normally closed alarm contact in the presence of a high vacuum level. It should be mounted Vertically as close to the Vacuum Regulator as practical and before the gas rate valve. The alarm point is adjustable between 2 and s: Inches of Mercury to allow the switch to actuate at the required vacuum.

Contacts rated at 5 A @ 250 Vac or 28 Vdc maximum, (Resistive Load)
Enclosure NEMA 4X.
Dimensions 102 mm W x 94 mm D x 145 mm H.
Weight 2 kg.

ITEM QTY Description
1 1 ADJUSTMENT PLUG
2 1 O-RING
3 1 HOUSING BCDY
4 1 SPRING
5 2 SCREW, 6-32 X 3/8 LG BD HD
6 1 SPRING ADAPTOR
7 1 LOWER DIAPHRAGM PIN
8 2 DIAPHRAGM
9 1 DIAPHRAGM SPACER
10 1 UPPER DIAPHRAGM PIN
11 1 DIAPHRAGM SEAL
12 1 ENCLOSURE
13 2 SCREW, 10-24 X 3/8 LG RD HD
14 2 SCREW, 2 -56 X 1/2 LG RD HD
15 1 MICROSWITCH
16 1 LEVER ASSEMBLY
17 2 NUT, 10-24
18 2 SCREW, 10- 24 X 1/2 LG RD HD
19 1 MOUNTING BRACKET
20 1 TUBING CONNECTOR, 1/4 X 3/8 X 90'
21 1 SCREW, 2-56 X 3/16 LG RD HD

Item Part Number
Low Vacuum High Vacuum
4 R-5589 R-5588