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Pressure Sensor

NASON LOW PRESSURE SWITCH S M

Description

The tamper-resistant SM Low Pressure Switch is factory-set and capable of withstanding a maximum operating pressure of up to 250 PSI. The SM features set points from 2-120 PSI and is available in a variety of base material options, including brass, aluminum, nickel-plated, steel, 303 SS and 316 SS.

Snap-Action Switches

Nason uses only the highest quality snap-action electrical switches which insures a positive,
instantaneous electrical contact under all operating conditions. Nason electrical switches are UL, CSA, CE, and military listed. Ask about

Diaphragms

Nason pressure switches incorporate elastomer diaphragms to provide a positive media seal. Nitrile is the material of choice for most applications. Ethylene propylene, fluorocarbon, fluorosilicon, and neoprene are readily available for specific applications.

Differential

A distinct change in pressure (or temperature for temperature switches) is necessary to reset a Nason
snap-action switch to its original electrical state. This feature prevents “searching” and maximizes switch and system life. Catalog ranges are typical mid-range and can be varied with special construction.

Electrical and Media Connections

A wide variety of electrical connectors are readily available for most applications. Screw terminals, wire leads, blades, studs, conduit, automotive DIN and military connectors are stock items.

Nason’s offering of media connections is unmatched in the industry. NPT, BSP, SAE, JIS, DIN, MS and many others are readily available.

Electrical

A unique variety of electrical contact arrangements allows the system designer to achieve complex logic at minimal cost. Contact arrangements up to form ZZ and isolated dual set points are available.

Most Nason switches are available in a nominal 5 or 10 AMP rating. Gold plated contacts for low current and 25 AMP ratings are also available.

ELECTRICAL CONNECTION OPTIONS

Nason knows that your designs are used in all types of applications imaginable, so we want to make sure you have a choice of how you configure electrical connections. We offer you a wide and growing selection of connections, and if you want something else, just ask our design engineers for it.

Application

Nason switches are used successfully in a great variety of pneumatic and hydraulic applications. Military vehicles and equipment, aviation, marine, machine tools, farm and construction equipment, process equipment, medical equipment, and industrial machinery are typical applications.

Features

  • Low to high pressure switch models with 2 psi to 7500 psi set points
  •  High-quality snap-action design
  • Long-life elastomer diaphragms
  • Proven sealed piston sensor on high-pressure models
  • Over one million operating cycles
  • 100% tested for accuracy
  • Models for both pneumatic and hydraulic applications
  • Adjustable and factory preset models
  • Customizable
  • NEMA 4 and 13 available

Operating Specifications Low Pressure Switch SQ

  • Set Point Range 2 — 120 PSI (.14 — 8.3 Bar)
  • Set Point Tolerance ±1 PSI or 5% (.07 Bar)
  • Maximum Operating Pressure 250 PSI (17 Bar)
  • Proof Pressure 750 PSI (51 Bar)
  • Differential 8 — 16%
  • Current Rating 5 A @ 250 VAC 5 A @ 30 VDC (Resistive)
  • Media Connection Standard: Brass (Optional: Aluminum, Nickel Plating, Delrin, Zinc Plated Steel, 303 SS, 316 SS)
  • Circuit Form SPST-NO, SPST-NC or SPDT
  • Electrical Connection See Order Chart Below for Options
  • Diaphragm Material Buna N
  • Cycle Life 1 Million
  • Operating Temperature -20°F – +220°F
  • Unit Weight .13 lbs

Catalog low pressure switch 

How to Order

Example: Part Number: SM – 2A – 95R /

/ *

See pages 15 – 17 for additional options available on this model. For custom designs and technical assistance call 800.229.4955 or visit us at www.nasonptc.com
* Defaults to Screw Terminals

Operating Specifications Low Pressure Switch SM

  • Set Point Range 2 – 120 PSI (.14 – 8.3 Bar)
  • Set Point Tolerance ±1 PSI or 5% (.07 Bar)
  • Maximum Operating Pressure 250 PSI (17 Bar)
  • Proof Pressure 750 PSI (51 Bar)
  • Differential 8 – 16%
  • Current Rating 5 A @ 250 VAC
  • 5 A @ 30 VDC (Resistive)
  • Media Connection See Order Chart Below for Options
  • Circuit Form SPST-NO or SPST-NC
  • Electrical Connection See Order Chart Below for Options
  • Diaphragm Material Buna N
  • Cycle Life 1 Million

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