PSW-681-Series

OEM Mechanical Pressure Switch for Low Pressure and Vacuum

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Models In Stock

Compound Range Covers Vacuum and Pressure in One Unit
Low Inch of Water Ranges
Silver Switch Contacts Rated for 5 Amps @ 250 Vac
1 Amp, Gold-Plated Contacts for TTL or Dry Contacts

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PSW-681-Series

From ^$ 231.73

Models In Stock

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2 Variations available

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Product Overview

Control Output SPST Relay
Cycling < 20 cycles/min
Deadband Type Fixed
Decreasing Pressure, Max -6.8 inHg
Decreasing Pressure, Min -100 inHg
Electrical Connection Pigtail Leads
Height 2.25 in
Increasing Pressure, Max -5.4 inHg
Increasing Pressure, Min -100 inHg
Insulation PVC
Length 2.3 in
Materials, Wetted 316 Stainless Steel, Aluminum, Buna-N (NBR), Methacrylate Ester
Measurement Pressure, Max 200 inH₂O
Measurement Pressure, Min 2.75 inH₂O
Measurement Pressure Type Compound Gauge
Process Connection Size 1/8 in
Process Connection Type NPT Male
Process Temperature, Max 90 °C
Process Temperature, Min -55 °C
Process Temperature Note -55 to 90°C (-67 to 194°F); a setpoint change of up to 2% of sensor capacity can be anticipated when switch is used either below -25°C (-13°F) or above 50°C (122°F)
Proof Pressure Up to 20 psi
Setpoint Repeatability ± 0.8 inH20
Switch Single
Switch Type SPST
System Pressure, Max 20 psi
Weight 7.8 oz
Wire Gauge 20 AWG
Wiring/Connector Table Red = N/C, White = N/O, Black = Common

The PSW-681 series is a compact, economical mechanical pressure switch designed for extremely low pressure and vacuum applications. Featuring a fixed deadband and SPST relay output, it offers reliable control in OEM systems requiring precise pressure monitoring. Its robust design ensures consistent performance in demanding environments.

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