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DA-21-153-8S | Pressure switch | 403SS Bourdon tube | range 10-200 psig | 8 psig min. deadband. | Dwyer Instruments

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Dwyer Instruments DA-21-153-8S Documents

DA/DS with Mercury Switch DA/DS with Snap Switch Series DA/DS Catalog Page Mercury Switch More Info

Overview

Details for DA-21-153-8S

The Dwyer Instruments DA-21-153-8S is a pressure switch designed for applications such as pump control, pressure monitoring, and alarm systems. With its SPDT (Single Pole Double Throw) switch configuration and a pressure range of 10-200 psi, this switch provides versatile control over a wide range of applications. Constructed from durable stainless steel, the DA-21-153-8S ensures longevity and reliability in harsh industrial environments. Its compact design allows for easy installation, while the electrical connections are clearly marked for quick and efficient wiring. The switch features an adjustable set point and deadband, enabling customization to specific application requirements. The set point determines the pressure at which the switch activates or deactivates, and the deadband prevents rapid cycling around the set point. The Dwyer Instruments DA-21-153-8S is an ideal solution for demanding industrial applications where precision pressure control and monitoring are critical. Its rugged construction, adjustable settings, and versatile SPDT configuration make it a reliable and flexible choice for engineers and maintenance professionals. Discover the best prices and fast shipping at our HVAC supply store for your industrial automation needs. Choose the DA-21-153-8S for dependable pressure control and monitoring in your operations.

SERIES DA/DS BOURDON TUBE PRESSURE SWITCHES

Pressure Ranges to 8000 psi (551.6 bar)

Customers tell us that the Series DA/DS Bourdon Tube Pressure Switches are the best pressure switches made. The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA/DS Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The DS Models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available.

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Product Applications

Compressors
Mechanical HVAC or process equipment
Pump control

Visible calibrated dial provides an easy and fast check without having to open devicecausing dangerous conditions to operators
On/off indication (except hermetically sealed snap switch models) gives operatorclear indication of state of switched equipment that could be located in anotherlocation
Adjustable or fixed deadband supports control applications by reducing equipmentwear-out by unnecessary recycling
External switch setpoint adjustments reduces set-up time
Pressure ranges of full vacuum to 8000 psig gives application designers the ability tospecify standard equipment, simplifying install and training, and reducing servicingcosts
UL listed, CSA approved many models FM approved to support rigorous processapplications and regulations
General purpose, weatherproof or explosion-proof enclosures for a variety of indooror outdoor environments meeting the needs of multiple applications and uses

Specifications

Series: DA/DS BOURDON TUBE PRESSURE SWITCHES
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Category/Type: Pressure
Type: Single Pressure
Series: DA/DS BOURDON TUBE PRESSURE SWITCHES
Wetted Materials: Brass; 403 SS; or 316 SS.
Temperature Limit: 180°F (82°C).
Pressure Limit: Maximum pressure of the operating range.
Enclosure Rating: General purpose; weatherproof or explosion-proof.
Repeatability: ±1% of full operating range; ±1.5% on DS-7300 models.
Switch Type: SPST mercury switch; SPDT mercury switch; SPDT snap switch.
Electrical Rating: See Catalog page.
Electrical Connections: Screw terminal.
Conduit Connection: General purpose: 1/2" hole for conduit hub. Weatherproof: 1/2" conduit hub. Explosion-proof: 3/4" female NPT.
Process Connection: General purpose and weatherproof: 1/4" male NPT; 1/2" male NPT on range 15S and 16S. Explosion-proof: 1/2" male NPT and 1/4" female NPT.
Mounting Orientation: Vertical.
Set Point Adjustment: Thumbscrew.
Weight: General purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7 kg). Explosion-proof: 8 lb (3.5 kg).
Deadband: See Catalog page.
Agency Approvals: CSA; FM; UL. (Consult factory for FM approval models.)