PSW-180 INDUSTRIAL DIFFERENTIAL PRESSURE SWITCH or ALARM
The PSW-180 is a compact, industrial differential pressure switch or alarm designed for precise monitoring in harsh environments, featuring a durable NEMA-4X (IP65) enclosure and a 5A SPDT relay output. It offers reliable performance with ±1% repeatability and can be configured with either electrical switch contacts or a loud, battery-powered audible alarm. The unit can be specified with different materials, pressure ports, and measurement ranges, and its set point is adjustable externally.
Key features
Function: Measures the pressure difference between two points and can trigger either an electrical switch or an audible alarm.
Output: 5 A SPDT (Single-Pole Double-Throw) relay output or an internal 85 dB audible alarm powered by a 9V battery.
Durability: Housed in a weather-resistant NEMA-4X enclosure, suitable for industrial applications.
Performance: Offers ±1% repeatability and is rated for working pressures up to 150 psid.
Adjustability: Features an externally accessible, multi-turn screw for easy set point adjustment.
Pressure ports: Available with 1/4 NPTF brass or 1/4 NPSF polysulfone pressure ports.
Operating conditions: The switch is rated for operating temperatures between 0°C and 70°C (32°F to 158°F), with a maximum media temperature of 95°C (203°F) at 100 psi.
Applications
- Monitoring pressure drop across filters and strainers
- Controlling fan speeds or VAV systems
- General pressure monitoring in industrial processes
Specifications
PSW-180 INDUSTRIAL DIFFERENTIAL PRESSURE SWITCH or ALARM
Switch: SPDT rated at 5 amp at 250/125 Vac, 5 amps at 30 Vdc, gold-clad contacts
Audible Alarm: Internal 9 Vdc battery powered, continuous tone 85 dB (battery included)
Repeatability: 1% of span
Ambient Temperature:
- Storage: -30 to 80°C (-22 to 176°F)
- Operating: 0 to 70°C (32 to 158°F)
Max Media Temp: 95°C (203°F) @ 100 psi
Vibration: MIL STD 810C, 2.5 g’s 5-500 cps
Shock: 15 g’s, 10 msec duration.
Working Pressure: 0-150 psid at up to 70°C (158°F) air temperature
Differential Proof Pres: 150 psid at up to 70°C (158°F) air temperature
Enclosure: NEMA-4, reinforced polyester body, zinc-plated steel cover with neoprene gasket, terminal block wiring
Adjustment: multi-turn screw, accessible from outside enclosure
Pressure Port: 1/4 NPTF brass or 1/4 NPSF polysulfone
Dimensions:
- Polysulfone: 70 W x 60 D x 89 H mm (2.75 x 2.38 x 3.5″)
- Brass: 80 W x 60 D x 89 H mm (3.13 x 2.38 x 3.5″)
- Weight: 165 g (5.8 oz) (approximate)
PSW-180 INDUSTRIAL DIFFERENTIAL PRESSURE SWITCH or ALARM
Control Output
SPDT Relay |
Enclosure Ratings
IP65, NEMA Type 4 |
Length
2.38 in |
Operating Temperature, Max
70 °C |
Operating Temperature, Min
0 °C |
Output Note
15 A: 125/250/480 Vac, 0.5 A: 125 Vdc, 0.25 A: 250 Vdc |
Process Connection Size
1/4 in |
Process Connection Type
NPT Female |
Process Temperature, Min
0 °C |
Proof Pressure Note
150 psid at up to 70°C (158°F) air temperature |
Repeatability
± 1% |
Repeatability Note
1% of span |
Shock
Setpoint repeats after 15 g, 10 ms duration |
Storage Temperature, Max
80 °C |
Storage Temperature, Min
-30 °C |
Switch Note
SPDT rated at 5 A at 250/125 Vac, 5 A at 30 Vdc, gold-clad contacts |
Switch Type
SPDT NO/NC, Selectable |
Vibration
MIL STD 810C, 2.5 g, 5 to 500 cps |
Weight
5.8 oz |
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