BASIC DESCRIPTION
20
&
25
SERIES
PRESSURE/VACUUM
SWICHGAGEÒ.
20 Series (2-1/16", 52mm mounting hole) and 25 series
(2-11/16" 68mm mounting hole) have steel cases and
are diaphragm actuated. The pointer/contact grounds
through the case to complete the switch circuit. The limit
contact(s) is wired to power, through a Murphy Magnetic
Switch. See diagrams for SWICHGAGEâ wire color
code. Contacts are rated 2A @ 30V resistive(pilot duty);
gauge connection is 1/8-27 NPT. See installation and
typical wiring diagrams for wire up of SWICHGAGEâ
and Murphy magnetic switch.
A20
&
A25
SERIES
PRESSURE/VACUUM
SWICHGAGE.
A20 series 12-1/16", 52mm mounting hole) and A25
series
(2-11/16
68mm
mounting
hole)
have
polycarbonate cases and are diaphragm actuated.
These cases have molded, isolated terminals for switch
contact: the pointer-contact is wired to common or
ground: the limit contact(s) is wired to power, through a
Murphy magnetic switch. See SWICHGAGEÒ diagrams
for terminal codes. Contacts 2A @ 30V resistive (pilot
duty); gauge connection 1/8-27 NPT. See installation
and typical wiring diagrams on this sheet, for wire up of
SWICHGAGE and Murphy magnetic switch.
STANDARD ELECTRICAL DIAGRAMS: 20 & 25 - PRESSURE/VACUUM SERIES
THESE DIAGRAMS ARE SHOWN WITH POINTER IN THE NORMAL OPERATING RANGE.
Std. Switch Rating:
Pilot Duty 2A @
Micro-Switch Rating: 3A @ 30 VDC inductive
30 VAC/DC resistive
4A @ 125 VAC inductive
STANDARD ELECTRICAL DIAGRAMS: A20 - PRESSURE/VACUUM SERIES
THESE DIAGRAMS ARE SHOWN WITH THE GAUGE POINTER IN THE NORMAL OPERATING RANGE.
Std. Switch Rating:
Pilot Duty 2A @
Micro-Switch Rating: 3A @ 30 VDC inductive
30 VAC/DC resistive
4A @ 125 VAC inductive
STANDARD ELECTRICAL DIAGRAMS: A-25 - PRESSURE/VACUUM SERIES
THESE DIAGRAMS ARE SHOWN WITH TEMPERATURE POINTER IN NORMAL OPERATING RANGE
Std. Switch Rating:
Pilot Duty 2A @
Micro-Switch Rating: 3A @ 30 VDC inductive
30 VAC/DC resistive
4A @ 125 VAC inductive
