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Mercoid div. of Dwyer Instruments

DA/DS/DR Series Pressure Switches

Mercoid DA Series Pressure Switch
  • Pressure, Vacuum and Compound Ranges available up to 8000 PSIG
  • Minimum deadband is obtainable at any point in the range
  • UL and CSA listed - many models are FM listed
  • Available housings include Weather Proof and Explosion Proof

  • Customers tell us that this is the best pressure switch made. Our most popular, Model DA combines extremely high sensitivity and repeatability with easily adjustable set and reset points through non-interactive external adjustments. Visible calibrated dial for set points and on/off indicator to indicate switch actuation are included. Choose either high current snap switch or hermetically sealed contact mercury switch for lifetime reliability. The DS series features a low fixed deadband. The model DR features a manual reset, which can be active on rise or fall.


    Specifications

    Maximum Temperature 180°F. For higher temperature media applications, a remote connection or syphon should be used.
    Pressure Connection 1/4" MNPT (1/2" MNPT on 15S range)
    Housing Pressure Steel with transparent cover (standard DA/DS/DR)
    Wiring Connections 3 screw type
    Maximum Pressure Maximum adjustment range
    Electrical
    Mercury Switches
    Code
    Circuit Suffix
    AC Capacity
    DC Resistive
    Horsepower
     




    I (See note 2)
     
    -2, -3 
    -153, -804 
    -2, -3 
    -2, -3 
    -2, -3
    120V
    240V
    440V
    10A 
    4A 
    See note 6 
    5A 
    0.3A
    5A 
    2A 
    See note 6 
    2A 
    0.15A
    3A 
    See note1 
    See note 6 
    NA 
    NA
    120V
    240V
    10A 
    4A 
    10A 
    2.5A 
    0.15A
    5A 
    2A 
    5A 
    1A 
    0.07A
    AC
    DC
    3/4 
    1/8 
    3/4 
    1/8 
    NA
    1/3 
    NA 
    1/3 
    1/10 
    NA
    Snap Action Switches
    Code
    Circuit Suffix
    AC Capacity
    DC Resistive
    Horsepower
     



    G
     
    -153 
    -153 
    -804 
    -804
    120V
    240V
    440V
    15A 
    15A 
    12A 
    5A
    15A 
    15A 
    10A 
    5A
    15A@480V 
    NA 
    5A 
    NA
    120V
    240V
    1/2A 
    See note 4 
    1/2A 
    See note 5
    1/4A 
    See note 4 
    1/4A 
    See note 5
    AC
    DC
    1/8 
     

    NA

    NA 
    NA 
    NA 
    NA
    Notes: 
    1: -153 circuit available 1A 440VAC on special order 
    2: Also rated 0.9 Amps at 24 VAC 
    3: 1/4 HP @ 120 VAC; 1/2 HP @ 240 VAC 
    4: DC Rated Controls (up to 10 Amps) available on special order 
    5: 5A, 30 VDC resistive 
    6: 17A non-inductive at 120/240/440 VAC
    DA/DS/DR Series Housings
    DA- NEMA1 Housing
    Case Dimensions
    General Purpose NEMA 1 Enclosure
    For infoor use and other general purpose applications under normal atmospheric conditions. Providess protection against dust and light splashing. Heavy gauge plain steel case. Flanged ase available. Transparent cover for visible on-off operation. Locking device prevents tampering. Bottom or back pressure connection, 1/4" NPT (1/2" NPT on 15S range). Electrical connection back of case for 1/2" conduit or BX. Shipping weight 4 lbs (2 kg.). Furnished as standard, unless otherwise specified. This enclosure is also suitable for Class I, Division 2 applications with the addition of a conduit hub (mercury switch models only).
    DAW - NEMA4 Weatherproof Housing
    Case Dimensions
    Water Tight, Dust Tight - NEMA 3S, 4, & 4X Enclosure
    For outdoor or indoor applications. Complies with hose test and requirements for water tight, dust tight, drip tight weatherproof, weather resistant, splash proof, sleet proof and moisture resistant. Flanged, heavy gauge steel case with transparent cover for visible on-off operation. External adjustments protected by cover. Bottom pressure connection only. Electrical connection back of case for 1/2" conduit, removable 1/2" hub. Shipping weight 6 lbs (3 kg.).
    DAH Explosion Proof Housing
    Case Dimensions
    Explosion Proof - NEMA 7 and 9 Enclosure
    Hazardous area enclosure suitable for Class I, Groups C & D, Class II, Groups E, F & G; NEMA 7 and 9 applications. Control mechanism is an integral part of the enclosure and cannot be replaced in the field. For surface, panel or pipe mounting. Aluminum case with glass window in cover for visible on-off operation. Bottom pressure connection. External adjustments. Available with breather and drain. Shipping weight 8 lbx (3.6 kg.). Not available on D80 series.

    Part Numbers

    Example   DA     70  153    DA-7021-153-7
    Reset Options   DA
    DR
    DR
    DS (note 3)
    DL (notes 1,3)
               
    U
    L
      Automatic Reset, Adjustable Deadband
    Manual Reset, Fixed Deadband, Operates on decrease automatically
    Manual Reset, Fixed Deadband, Operatures on increase automatically
    Automatic Reset, Fixed deadband
    Manual lock reset, fixed deadband, available on special order only
    Housing & 
    Approval Options

    N3





    See Note 7

    W
    W
    H
    E




    F

                Weather proof enclosure, Nema 3S, 4 and 4X. Flanged back standard
    Weather resistant, includes drain. Flanged back standard. Available as special order only.
    Explosion proof enclosure - control integral. Available only on DA, DR, DS
    Explosion proof enclosure - control removeable. Availe only on DA, DR, DS
    Factory Mutual Approval. DAW is FM approved as standard.
    Circuit 
    Switching 
    Options
     
     
     
     
     
     

    See notes 2 & 8 
    See notes 2 & 8 
    See notes 2 & 8 
    See notes 2 & 8 
     
     

    See note 12 
     

       
     
     
     









    70 
    70 
    72 
    72

       

    153 
    156 
    804 


    4122 
    4129 
    4132 
    4123 


    153 
    804 
    153 
    804
    B

      SPST opens on pressure increase. Elect. Code A, Mercury Switch
    SPST closes on pressure increase. Elect. Code A, Mercury Switch
    SPDT, Electrical Code B, Mercury Switch
    2 each SPST, one opens as the other closes. Elect. Code A, Mercury Switch
    2 each SPDT, Elect. Code B, Mercury Switch; Elect. Code G, Snap Switch
    SPST, opens on increase, Elect. Code I, DS only, Mercury Switch
    SPST, closes on increase, Elect. Code I, DS only Mercury Switch
    Two Stage Control, includes 2 each SPST Mercury Switch
    Two Stage Control, includes 2 each SPST Mercury Switch
    Two Stage Control, includes 2 each SPST Mercury Switch
    Two Stage Control, includes 2 each SPST Mercury Switch
    SPST, opens on increase, Elect. Code H, Mercury Switch
    SPST, closes on increase, Elect. Code H, Mercury Switch
    SPDT, Elect. Code D, Snap Switch
    2 each SPDT, Elect Code F, for ranges above 35 PSI only, 702x, 703x, 704x only
    DS only SPDT Snap Switch, Elect code E
    2 each SPDT snap switches, Elect code G, DS only
    Delrin Bushed Movement. For all controls
    Ranges 
    and 
    Bourdon Tube 
    Materials





































    See Note 6
    See Note 6
    See Note 6
          2
    2
    2
    2
    2
    2
    2
    2
    2
    2
    2
    2
    2

    3
    3
    3
    3
    3
    3
    3
    3
    3
    3
    3

    4
    4
    4
    4
    4
    4
    4
    4
    4

    8
    8
    8
          25S
    26S
    5S
    6S
    8S
    9S
    9AS
    10S
    11S
    12S
    13S
    15S
    16S

    2
    3
    1
    3A
    4
    27
    5
    6
    7
    8
    9

    26E
    23E
    6E
    24E
    9E
    21E
    22E
    11E
    13E

    23K
    24K
    9K
    30"Hg Vacuum - 60 PSIG, Type 403SS Bourdon Tube 
    30"Hg Vacuum - 75 PSIG, Type 403SS Bourdon Tube 
    2-60 PSIG, Type 403SS Bourdon Tube 
    5-100 PSIG, Type 403SS Bourdon Tube 
    10-200 PSIG, Type 403SS Bourdon Tube 
    10-300 PSIG, Type 403SS Bourdon Tube 
    40-350 PSIG, Type 403SS Bourdon Tube 
    25-600 PSIG, Type 403SS Bourdon Tube 
    50-1000 PSIG, Type 403SS Bourdon Tube 
    100-1500 PSIG, Type 403SS Bourdon Tube 
    300-2500 PSIG, Type 403SS Bourdon Tube 
    500-5000 PSIG, Type 403SS Bourdon Tube 
    800-8000 PSIG, Type 403SS Bourdon Tube

    0-30"Hg Vacuum, Brass Bourdon Tube
    10"Hg - 2 PSIG, Brass Bourdon Tube
    1/8-15 PSIG, Brass Bourdon Tube
    1/8-20 PSIG, Brass Bourdon Tube
    1-35 PSIG, Brass Bourdon Tube
    25"Hg - 50 PSIG, Brass Bourdon Tube
    2-60 PSIG, Brass Bourdon Tube
    5-100 PSIG, Brass Bourdon Tube
    5-150 PSIG, Brass Bourdon Tube
    10-200 PSIG, Brass Bourdon Tube
    10-300 PSIG, Brass Bourdon Tube

    30"Hg - 75 PSI, 316SS Bourdon Tube
    5-75 PSIG, 316SS Bourdon Tube
    10-100 PSIG, 316SS Bourdon Tube
    10-150 PSIG, 316SS Bourdon Tube
    10-300 PSIG, 316SS Bourdon Tube
    30-400 PSIG, 316SS Bourdon Tube
    75-800 PSIG, 316SS Bourdon Tube
    100-1000 PSIG, 316SS Bourdon Tube
    200-2500 PSIG, 316SS Bourdon Tube

    5-75 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard
    10-150 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard
    10-300 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard
    Connection 
    and 
    Mounting Options
                1
    2
    3
    4
          Standard Housing
    Back Connection. Not available for ranges 15S & 16S
    Flanged Back (Standard on W models)
    Back Connection and Flanged Back. Not Available for ranges 15S & 16S

    Notes for above table:

    Note 1: Not available on D_ _ - _5, 74 or 95
    Note 2: Available on DA only
    Note 3: Not available on D_ _ _ - 70_ _
    Note 6: Available also as _ _28, 58, 708 and 728. Not available with E or H housing or 70-804 circuit.
    Note 7: F available only as DAF, DSF, DRF, DAHF, DRHF, DSHF; not all ranges or circuits.
    Note 8: Switch rating for D-400:
    AC, 120V @ 0.3A; 240V @ 0.15A; 24V @ 0.8A
    DC, 120V @ 0.15A; 240V @ 0.07A
    Not available for 440V Service
    Note 12: Available only on 702, 703 and 704

    Approximate Minimum Deadbands

    Single Stage Controls - Deadbands apply to -2, -3 and -153 circuits only
    Deadbands may increase for other circuits or multiple circuits.
    Deadband Chart

    Contact Us!

    Sherman Instruments
    John Sherman Agencies Ltd.
    1641 Venables Street
    Vancouver, British Columbia, Canada
    V5L 2H1

    Phone: 604-254-9622
    Fax: 604-254-3123

    e-mail: info@johnsherman.com
    www.johnsherman.com
     
     

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