Bourdon Tube Pressure Switch Series DA/DS

Customers tell us that this is the best pressure switch made. The Mercoid D Series is one of the world's broadest lines of pressure switches. Whatever your application might be, it is most probable it can be fully satisfied with a D Series pressure switch.

The D 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 set points, is adjustable over the full scale. The DS Models are equipped with a single external adjustment for setting operating point only. The deadband is fixed at a factory setting and cannot be altered in the field. For switches choose between the snap action switch, hermetically sealed snap action switch and hermetically sealed mercury switch.

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, 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:

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:

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