Page 1
PRESSURE, VACUUM, AND
DIFFERENTIAL SWITCHES
PRINTED CIRCUIT BOARD MOUNTABLE
PSW23 Series
PSW24 Series
PSW25 Series
All Models
All products
shown larger
than actual size.
PSW23-(*)
$
22
⻬ UL Recognized,
CSA Certified
⻬ Printed Circuit
Board Mountable
⻬ Leads Available
as an Option
⻬ Several Fitting Styles
Available
⻬ Pressure, Vacuum,
and Differential
Models Available
⻬ Fixed Setpoint
These miniature single-pole
switches are used in pressure and
vacuum applications in which
moderate accuracy is sufficient.
The fixed setpoint is factory set.
SPECIFICATIONS
Temperature Range:
-10 to 75°C (14 to 167°F)
Setpoint Accuracy:
±10% of setting at 21°C (70°F)
Note: Pressure settings may change
over the temperature range.
Materials of Construction
Lower Body: Rynite plastic (with pin
terminals molded in)
Upper Body: Acetal plastic
Diaphragm: EPDM (ethylene-propylene
diene monomer)
Internal Parts: Acetal plastic
Screws: Stainless steel or zinc-plated
steel, flash
Contacts: SPST (normally open); gold flash
over silver-plated copper alloy
Pins: Gold flash over silver-plated
copper alloy
Leads [Optional (-L)]: 8", 20 AWG
stranded PVC-insulated wire fastened to
the switch terminals
PSW25-(*)
PSW24-(*)
Electrical: SPST (NO), 1 A resistive
250 Vac; ratings are dependent on
actuation pressure and must be derated
at lower pressures (under 1 psi).
Pressure Connection
PSW23: 1⁄8 MNPT
PSW24: Center spout for 1⁄8 ID tubing;
provided with 9⁄16-18 mounting nut.
PSW25: Radial spout for
Proof Pressure: See table
Hysteresis (Deadband): Negligible
Media Compatibility: Air, water and
many other fluids and gases that are
compatible with EPDM acetal plastic
1
⁄8 ID tubing
Note: Mineral oil and similar fluids are
not compatible with EPDM. Request
nitrile diaphragms (see “Custom
Switches” on next page). Contacts are
exposed to media on base spout.
Overall Dimensions:
38 x 25 mm (1.5 x 1")
Pin Spacing: 12.7 mm (0.5") centers
Weight: 6 g (0.2 oz)
Approvals: UL-recognized,
CSA-certified switches
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
PRESSURE MODELS PSW23
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW23-10W $22 10 inH2O 250 inH2O
PSW23-20W 22 20 inH2O 250 inH2O
PSW23-1P 22 1 psig 40 psig
PSW23-2P 22 2 psig 40 psig
PSW23-10P 22 10 psig 40 psig
PSW23-20P 22 20 psig 40 psig
PSW23-30P 22 30 psig 60 psig
Ordering Example: PSW23-10P, fixed setpoint of 10 psig, $22.
H-9
1
MNPT with
⁄
8
9
Threaded Mounting Nut Included
⁄
16
Page 2
PRESSURE, VACUUM, AND DIFFERENTIAL SWITCHES
MOST POPULAR MODELS HIGHLIGHTED!
PSW23-(*)-L
Note:
On vacuum
models,
black side
spout is the
vacuum port
VACUUM MODELS PSW23V
1
MNPT with
⁄
8
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW23V-10W $22 10 inWC Vac 300 inWC Vac
PSW23V-20W 22 20 inWC Vac 300 inWC Vac
PSW23V-50W 22 50 inWC Vac 300 inWC Vac
PSW23V-100W 22 100 inWC Vac 300 inWC Vac
PSW23V-200W 22 200 inWC Vac 400 inWC Vac
PRESSURE MODELS PSW24 Center Spout for
with 9⁄16 Threaded Mounting Nut and Tube Lock Nut Included
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW24-10W $22 10 inH2O 250 inH2O
PSW24-20W 22 20 inH2O 250 inH2O
PSW24-1P 22 1 psig 40 psig
PSW24-2P 22 2 psig 40 psig
PSW24-10P 22 10 psig 40 psig
PSW24-20P 22 20 psig 40 psig
9
Threaded Mounting Nut Included
⁄
16
1
ID Tubing,
⁄
8
PRESSURE SWITCHES
H
PSW24-(*)-L
All products shown
smaller than actual size.
PSW23-(*)-L
PSW25-(*)-L
VACUUM MODELS PSW24V Center Spout for
Mounting Nut and Tube Lock Nut Included
1
ID Tubing, with
⁄
8
9
Threaded
⁄
16
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW24V-10W $22 10 inWC Vac 300 inWC Vac
PSW24V-20W 22 20 inWC Vac 300 inWC Vac
PSW24V-50W 22 50 inWC Vac 300 inWC Vac
PSW24V-100W 22 100 inWC Vac 300 inWC Vac
PSW24V-200W 22 200 inWC Vac 400 inWC Vac
PRESSURE MODELS PSW25 Radial Spout for
1
ID Tubing
⁄
8
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW25-10W $22 10 inH2O 250 inH2O
PSW25-20W 22 20 inH2O 250 inH2O
PSW25-1P 22 1 psig 40 psig
PSW25-2P 22 2 psig 40 psig
PSW25-10P 22 10 psig 40 psig
PSW25-20P 22 20 psig 40 psig
VACUUM MODELS PSW25V Radial Spout for
1
ID Tubing
⁄
8
MODEL NO. PRICE FIXED SETPOINT PROOF PRESSURE
PSW25V-10W $22 10 inWC Vac 300 inH2O
PSW25V-20W 22 20 inWC Vac 300 inH2O
PSW25V-50W 22 50 inWC Vac 300 inH2O
PSW25V-100W 22 100 inWC Vac 300 inH2O
PSW25V-200W 22 200 inWC Vac 400 inH2O
To order with 8" 20 AWG leads; add suffix “-L” to model number and $5 to price.
Ordering Example: PSW23V-10W-L, vacuum switch with a fixed setpoint of 10 inH2O
vacuum,
CUSTOM SWITCHES
Custom pressure switches are available–
50 piece minimum order; consult Pressure
Engineering for price and delivery
Custom Options: Pre-fixed setpoints
1
NPT pressure port, 8" 20 AWG leads, $22 + 5 = $27.
⁄
8
Diaphragm: Nitrile
Leads: Custom length
Electrical: SPST, normally closed
Vacuum Switches: Vacuum port at top
instead of black side spout (NC only)
other than those in the tables
H-10
Page 3
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