Dwyer Instruments SERIES P4 Catalog Page
Series
1
[25.40]
9/16-18 UNF-28
TYP 2 PLACES
3-41/64
[92.47]
1-17/64
[32.15]
19/32
[15.03]
59/64
[23.42]
P4
PPS Piston Flow Switch
Fixed Set Points from 0.1 to 1.5 GPM, SPST and SPDT Switching, Optional Adapters
FLOW
The Series P4 PPS Flow Switch features a molded plastic construction for enhanced
performance. Monitor liquids with fixed set points from 0.1 to 1.5 GPM. Choose normally
open or normally closed SPST or SPDT hermetically sealed reed switch technology. The
industrial switch features PPS R4 housing and piston, 316SS spring, Fluoroelastomer Oring and Epoxy. The inlet and outlet ports are 9/16˝-18 UNF-28 thread with optional 1/8˝
and 1/4˝ NPT or 1/2˝ barbed adapters.
Actuation Set Point
Model
GPM (LPM)
P4-11
.1 (.38)
P4-12
.25 (.95)
P4-13
.5 (1.89)
P4-14
.75 (2.84)
P4-15
1 (3.7)
P4-16
1.5 (5.68)
P4-31
.1 (.38)
P4-32
0.25 (.95)
P4-33
0.5 (1.89)
P4-34
0.75 (2.84)
P4-35
1.0 (3.79)
P4-36
1.5 (5.68)
Switch Type
SPST, NO
SPST, NO
SPST, NO
SPST, NO
SPST, NO
SPST, NO
SPDT
SPDT
SPDT
SPDT
SPDT
SPDT
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: Housing and piston:
Polyphenylene sulfide (PPS) R4;
Spring: 316 SS; O-ring:
Fluoroelastomer; Other: Epoxy.
Temperature Limits: 0 to 225°F (17 to
107°C).
Pressure Limits: 250 psig (17 bar) @
54°F (12°C).
Accuracy: ±15% of set point.
Repeatability: ±1%.
Switch Type: SPST or SPDT.
Optional Adapters
Model
P4-98
P4-94
P4-92
Description
1/8˝ NPT female
1/4˝ NPT female
1/2˝ barb female
Electrical Rating:
.08A @ 240 VAC, .13A @ 120 VDC, .06A
@ 240 VDC.
Electrical Connection: 18 AWG, 24˝
(60.96 cm), PVC lead wires.
Process Connection: 9/16-18 UNF-28
or choice of connection adapters (sold
separately).
Mounting Orientation: Any position.
Set points shown are based on vertical,
inlet down position.
Required Filtration: 50 microns or
better.
Weight: 4 oz (0.11 kg).
Agency Approvals: CE.
.17A @ 120 VAC,
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