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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 we offer the snap action switch. Hermetically sealed mercury switch also available.
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The explosion proof pressure switches series PMS10.3 are particularly suitable to be installed on every chemical, petrochemical plants, onshore and offshore applications and machineries food and pharmaceutical industry or however where is mandatory the use of instruments certified for zone 0/1
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The explosion proof pressure switches series PMS10.4 are particularly suitable to be installed on every chemical, petrochemical plants, onshore and offshore applications and machinery, food and pharmaceutical industry or however where is mandatory the use of instruments certified for zone 0/1
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The Series AT-ADPS ATEX/IECEx Approved Differential Pressure Switch is designed for pressure, vacuum, and differential pressure applications in hazardous areas. The dual scaled adjustment knob in inches water column and Pascals allows changes to the switching pressure to be made without a pressure gage. The switch is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The silicone diaphragm makes this series ideal for use with air and other noncombustible gases. Flameproof enclosures are available in aluminum and can include a glass window for viewing set point status on the adjustment knob.
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Explosion-proof Series H3 Explosion-Proof Differential Pressure Switch, heavy duty, industrial unit has a unique new design which provides sensitivity to differential pressures as low as 10 inches of water (254 mm w.c.), yet handles total pressure of 1500 psi (103 bar). Unlike common differential pressure switches that use a piston-type motion transfer, the Series H3 utilizes a rotary motion transfer shaft that prevents a change in total pressure from causing a setpoint shift. Unit yields deadbands approximately 5% of range, with zero setpoint shift due to variation in working pressures. Friction is minimized and repeatability increased by allowing range spring to act directly on diaphragm plate. Rolling diaphragm design maintains constant effective area to further reduce friction. Diaphragm is allowed to “seat”, allowing application of full rated pressure, up to 1500 psi (103 bar), on either high or low pressure port, without damage. Special over-travel feature prevents overtightening of range adjust screw.
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Reliable and convenient, the Series AP Diaphragm Operated Pressure Switch is a compact switch for instrument air or other low pressure applications. Visible set point and external adjustment add convenience. Used on air, non-corrosive gas or liquid service compatible with wetted parts. Units are available in weather-proof and explosion-proof housing.
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Series 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 in Class I, Div 1, Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres (NEMA 7 & 9), Raintight NEMA 3 (IP54). Weatherproof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20 in w.c. (0.0075 to 5 kPa) and from .5 to 50 psi (0.035 to 3.5 bar). The unit is very light and compact — about half the weight and bulk of other explosion-proof or weather-proof switches with separate enclosures.
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The differential pressure switches series DPMS8 for low and high static pressure are particularly suitable to be installed on every chemical, petrochemical plants, onshore and offshore applications and machinery, food and pharmaceutical industry .
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The pressure switches series PBS8 are particularly suitable to be installed on every chemical, petrochemical plants, onshore and offshore applications and machinery, food and pharmaceutical industry or however where is mandatory the use of all Stainless Steel instruments in presence of medium ? high pressure
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The pressure switches series PMS8 have been engineered to be used in presence of very low pressures on every chemical, petrochemical plants, ventilation plant where is mandatory the use of all Stainless Steel instruments
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The pressure switches series PMS8.1 are particularly suitable to be installed on every chemical, petrochemical plants, onshore and offshore applications and machinery, food and pharmaceutical industry or however where is mandatory the use of all Stainless Steel instruments
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The pressure switches series PMS8.2 are particularly suitable to be installed in presence of low pressures on every chemical, petrochemical plants, onshore and offshore applications or however where is mandatory the use of all Stainless Steel instruments
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The explosion-proof differential pressure switches of the DPMS10.1 series are particularly suitable for installation in all chemical, petrochemical, onshore and offshore plants, as well as in machinery, food and pharmaceutical industries and other applications where the use of Zone 0/1 certified instruments is mandatory.
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