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 ^$ 236.46

Models In Stock

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2 Variations available

See all series options below

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
Series ID PSW-681-Series
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

Supported Applications

The Omega PSW-681-Series consists of OEM mechanical pressure switches designed for low-pressure and vacuum applications. These devices serve as discrete control elements in systems requiring monitoring or actuation based on specific pressure thresholds within the low-range envelope.

Operating Conditions & Performance

The series is engineered to operate under conditions involving low positive pressures and vacuum levels. Specific performance parameters, including setpoint ranges, hysteresis values, ambient temperature limits, and response times for individual models are not detailed in the current documentation bundle.

Available Models

PSW-681: A configured variant within the low-pressure/vacuum switch family.
PSW-685: An alternative configuration offered in the same series envelope.

Configuration Options

The PSW-681-Series is available as an OEM component, indicating suitability for integration into larger assemblies or custom equipment. The documented variants include distinct part numbers (PSW-681 and PSW-685), suggesting differences in setpoint calibration, connection types, or electrical ratings that are not explicitly enumerated in the provided source data.

Key Product Differences

The series distinguishes between two primary model identifiers: PSW-681 and PSW-685. While both fall under the mechanical pressure switch category for low-pressure and vacuum service, specific technical differentiators such as electrical contact ratings, process connection dimensions, or housing materials are not specified in the available attributes.

Compliance