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Dwyer DA/DS Pressure Switch

Dwyer DA/DS Pressure Switch

BOURDON TUBE PRESSURE SWITCHES Pressure Ranges to 8000 psi (551.6 bar)


Welcome to purchase discount source pressure switch from our company, which is one of the best China pressure switch manufacturers and suppliers.

Pressure Switch

Customers tell us that the Dwyer SERIES DA/DS are the best pressure switches made. The Mercoid D Series is one of the world’s broadest lines of pressure switches. The D Pressure Switches Series has extremely high sensitivity and great repeatability. The DA pressure switch 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 pressure switch 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.


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.


±1% of full operating range, ±1.5% on DS-7300 models.

Switch Type:

SPST mercury switch, SPDT mercury switch,  SPDT snap switch, or SPDT hermetically sealed snap switch. Other circuit   types available.

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:



Set Point Adjustment:



General purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7   kg). Explosion-proof: 8 lb (3.5 kg).


See Catalog page.

Agency Approvals

CE, CSA, FM, UL. (mercury switch units are not CE   approved). (Consult factory for FM approval models.)

•    Compressors
•    Mechanical HVAC or process equipment
•    Pump control

You may email to postmaster@wtindustrialeqpt.com for quotations or visit http://www.wtindustrialeqpt.com/level-measurement/ for more information.

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