Page 1
PRESSURE
#8-32 SCREW
ø1-1/2 [ø38.1]
SERIES A6
DURABLE PRESSURE SWITCHES
Designed for Extended Duty, Simple and Reliable
A-439 A-439A-440 A-440
Series A6 Durable Pressure Switches have been specically designed to stand up
to extended duty applications. These switches are constructed with a polyimide lm
diaphragm and are compatible with a variety of uids. For ease of installation, the
switches come with a 1/4˝ male NPT process connection and can be mounted in any
orientation. The Series A6 pressure switches are compact and have great set point
integrity, and feature simple, easy set point eld adjustment.
BENEFITS/FEATURES
• High switch cycle means long life for extended duty applications
• Mounting in any position and feature simple makes a reliable switching for equipment
and OEM applications
APPLICATIONS
• OEM
MODEL CHART
Model
A6-153221
A6-253221
A6-353221
A6-453221
A6-553221
A6-653221
A6-753221
A6-853221
Set Point Range psi (bar)
NC NO
0.5 to 1 (0.03 to 0.07)
1.1 to 3 (0.08 to 0.21)
3.1 to 7 (0.21 to 0.48)
8 to 13 (0.55 to 0.90)
14 to 24 (0.97 to 1.66)
25 to 50 (1.73 to 3.45)
51 to 90 (3.52 to 6.21)
91 to 150 (6.28 to 10.35)
• Process equipment
• Process applications
1.1 to 3.1 (0.08 to 0.21)
2.27 to 6.05 (0.16 to 0.42)
4.22 to 10.75 (0.29 to 0.74)
12.3 to 17.5 (0.85 to 1.21)
18.6 to 31.8 (1.28 to 2.19)
33.1 to 61 (2.28 to 4.21)
65.6 to 112.3 (4.53 to 7.75)
114.7 to 198.3 (7.94 to 13.68)
1/4˝ NPT
TERMINALS
Ø1-1/2
2-7/16
[62]
SPECIFICATIONS
Service: Air, motor oils, transmission
oils, jet fuels, and similar hydrocarbon
media. (Not for water use)
Wetted Materials: Base: 304 SS;
Diaphragm: Polyamide lm.
Temperature Limits: -40 to 248°F (-40
to 120°C).
Pressure Limits: Operating pressure:
150 psi (10.3 bar) for 0.5-24 psi set point
ranges, 250 psi (17.2 bar) for 25 to150
psi set point ranges; Proof pressure: 500
psi (34.5 bar); Burst pressure: 750 psi
(51.7 bar) for 0.5-24 psi set point ranges,
1250 psi (86.2 bar) for 25-150 psi set
point ranges.
Enclosure Rating: General purpose or
with cover: IP65 - weatherproof.
ACCESSORIES
Model Description
A-439
Weatherproof IP65 cover
A-440
Weatherproof IP65 with y-wire holes
USA: California Proposition 65
WARNING: This product can expose you to chemicals including Lead, which is known to the State
of California to cause cancer and birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov.
Ø1.500
[Ø38.1]
Repeatability: ±10% of set point.
Set Point Tolerance: ±15% of range.
Switch Type: 1 SPST NO, 1 SPST NC.
NO and NC switch independent from
each other.
Electrical Ratings: Resistive: 15 A @ 6
VDC, 8 A @ 12 VDC, 4 A @ 24 VDC;
Inductive: 1 A @ 120 VAC, 0.5 A @ 240
VAC.
Electrical Connections: #8-32 screw
terminals.
Process Connection: 1/4˝ NPT male.
Mounting Orientation: Switch can be
installed in any position.
Set point Adjustment: Screw.
Weight: 0.13 lb (0.06 kg).
[Ø38.1]
2
[50.8]
2-5/16
[58.74]
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