Series SA1100 Diaphragm Operated Pressure Switch

Visible Setpoint, Adjustable Deadband, Hermetically Sealed Snap Switch, Weatherproof and Explosion-proof

Weatherproof and Explosion-Proof in One Economical Enclosure
Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both setpoint and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16" open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54.

Product Applications

  • Chemical, petroleum, food and drug processing industries. Used indoor, outdoor or in explosion-proof area.

Models & Ordering

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Model Number Description Usually Ships Price Order
SA1111E-A4-K1 Diaphragm operated pressure switch, 1/4" NPT(F) Process Connection, Buna-N Diaphragm and O-ring. Same Day $298.00 Order

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Specifications

Wetted Materials:
See Catalog page.
Temperature Limits:
-30 to 180°F (-35 to 82°C) standard. ATEX compliant at Ambient Temperature -4 to 167°F (-20 to 75°C); Process Temperature -4 to 167°F (-20 to 75°C).
Pressure Limit:
1200 psig (82.6 bar).
Enclosure Rating:
Weatherproof and Explosion-proof. Listed with UL and CSA for Class I, Gorups B, C and D; Class II Groups E, F and G. ATEX Compliant CE 0344 Ex II 2 G EEx d IIC T6 Process Temperature ?75°C. Weatherproof UL Rated Type 4. Meets NEMA 4X.
Switch Type:
SPDT or DPDT snap switch.
Electrical Rating:
See Catalog page.
Electrical Connections:
Screw terminal.
Conduit Connection:
3/4" female NPT.
Process Connection:
1/4" or 1/2" female NPT.
Mounting Orientation:
Within 20° of vertical.
Set Point Adjustment:
Internal 7/16" hex nuts.
Weight:
3.5 lb (1.6 kg).
Deadband:
See Catalog page.
Agency Approvals:
ATEX, CE, CSA, IECEx, UL.

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Model Chart

 
EXAMPLE SA11 11 E A 4 K 1 AT Series SA1111E-A4-K1-AT Diaphragm Operated Pressure Switch, adjustable range 10-150 psig, SPDT snap switch, aluminum pressure chamber, Buna-n diaphragm and o-ring, 1/4" female NPT, with ATEX certified construction.
SERIES SA11               Diaphragm Operated Pressure Switch
ADJUSTABLE
RANGE
  11
12
13
            10-150 psig (0.7-10 bar)
20-250 psig (1.4-17.2 bar)
30-500 psig (2.0-34.0 bar)
CIRCUIT (SWITCH)
OPTIONS
    E
HS
HG
          Snap Action Switch, Rated 15A @ 125/250/480 VAC
Hermetically Sealed Snap Switch, Rated 5A @ 125/250 VAC
Hermetically Sealed Snap Switch with Gold Contacts, Rated 1A @ 125 VAC
PRESSURE CHAMBER
MATERIAL (WETTED)
      A
B
S
        Aluminum
Brass
316SS
DIAPHRAGM
MATERIAL (WETTED)
        4
5
      Buna-N Diaphragm and O-ring
Fluorocarbon Diaphragm and O-ring
CIRCUIT (SWITCH)
TYPE
          K
L
    SPDT
DPDT (not available with HS or HG switch options)
PROCESS
CONNECTION
            1
2
  1/4" Female NPT
1/2" Female NPT
OPTIONS               AT
DRAIN
IEC
ST
PRESET
ATEX Approved
Housing with Drain (allows condensate to be drained)
IECEx Approval
Stainless Steel Tag
Preset

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