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Pressure Switches

L-Series

This broad Ashcroft® switch series is easy to use and readily retrofits to virtually all process, industrial and OEM applications.

N-Series

• Ashcroft® K Series polysilicon thin film pressure sensor (transducer) for long, stable life (minimum 1 million cycles at rated load)
• Setpoint repeatability of 0.5% of range
• Watertight, NEMA 4X, IP66 enclosures
• Pressure setpoints to 20,000 psi
• Deadbands adjustable between 0.1% and 95% of nominal range
• Multi-turn potentiometers make setpoint and deadband adjustments easy
• Status lights indicate switch state
• Continuous power assures operation first time and every time even after years of inactivity
• Big, easy-to-read LED display shows process pressure, setpoint and reset point

N-Series

• Ashcroft® K Series polysilicon thin film pressure sensor (transducer) for long, stable life (minimum 1 million cycles at rated load)
• Setpoint repeatability of 0.5% of range
• Choice of watertight, NEMA 4 or explosion-proof NEMA 7/9, IP66 enclosures for safety and reliability
• Pressure setpoints to 20,000 psi
• Deadbands adjustable between 0.1% and 95% of nominal range
• Multi-turn potentiometers make setpoint and deadband adjustments easy
• Status lights indicate switch state
• Continuous power assures operation first time and every time even after years of inactivity

Ideal for pressure alarm, shutdown, control on:
• Machine tools
• Injection molding machines
• Presses
• Pumps
• Hydraulic systems
• Turbines and compressors
• Most process applications

P-Series

This top-of-the-line Ashcroft® process switch series includes many state-of-the-art features for safety and reliability in virtually all process applications.

Series 1620

Dwyer's old faithful switch design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single...

Series 1640

The unique electric switch design in the 1640 is another Dwyer Instruments, Inc. innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the Series 1630 switches described on the previous page. The Model 1640, however, is equipped with a single pole, double throw floating...

Series 1900

Dwyer's most popular series combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non...

Series 1950

Model 1950 Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1900 Pressure Switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed, FM approved for use...

Series 1950G

The Model 1950G Explosion-Proof Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, and are UL listed for use in Class Groups A, B, C, & D; Class II, Groups E, F,...

Series 96201, 96211, 96221

• Compact size
• Low & high pressures including vacuum
• Extremely versatile
• Optional DIN and conduit connectors
• NEMA 1 & 4; IP65
• Single pole double throw snap action switching
• Factory preset or field adjustable

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