WIKA DA10 差壓開關 高靜壓保護10bar 低壓60mbar EEx-d防爆 IP65

Differential pressure switch
Ex protection Ex-d, IP 65, for low pressure ranges
Model DA10

Differential pressure switch model DA10

      Applications
       ■ Differential pressure monitoring and direct switching of electrical loads
       ■ For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive ambience
       ■ Process industry: Chemical/petrochemical, on- and offshore, technical gases, environmental technology,machine building and general plant construction, water treatment, pharmaceutical industry
       ■ Pump monitoring and control / filter monitoring, level measurement in closed tanks
       ■ Ignition protection type GAS Ex-d DUST Ex-tD Gr. II Cat. 1/2 GD

      Special features
       ■ Case flameproof enclosure
       ■ Ingress protection IP 65, NEMA 4
       ■ Ambient temperature -30 ... +85 °C
       ■ 1 or 2 independent switch points, high contact rating up to 15 A / AC 220 V
       ■ Differential pressure from 16 mbar, working pressure （static pressure） up to 10 bar
 
 
      Description
       These high-quality differential pressure switches have been developed especially for safety-critical applications. The high quality of the products ensures reliable monitoring of your plant. The manufacturer Cella is certified to ISO 9001.In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.
      All wetted parts materials are from stainless steel as standard. Each switch family is available in IP 65, Ex-ia or Ex-d versions.

      In order to ensure as flexible operation as possible, the pressure switches are equipped with micro switches, which make it possible to switch an electrical load of up to 15 A / AC 220 V directly. For smaller contact ratings, such as for PLC applications, Argon gas-filled micro switches with gold-plated contacts can be selected as an option.
      By using a diaphragm measuring cell with fulcrum lever transmission, the model DA10 pressure switch is extremely robust and guarantees optimal operating characteristics.

     Switch points
      The switch points can be set to your requirements, free-ofcharge.
      Please specify:

      Switch point, switching direction for each contact （e.g. switch point 1: 0.5 bar, falling, switch point 2: 3 bar, rising）
      With two micro switches, the switch points can be set independently of each other.

      After unscrewing the case cover, switch point adjustment can be made using the adjustment screw. The switch point is settable within the entire measuring range with the following
     general rule:
      ■ Define the value A = 2 x repeatability + switch hysteresis
      ■ If the pressure is rising, the switch point should be set between （min. + value A） up to max. of the setting range
      ■ If the pressure is falling, the switch point should be set between min. up to （max. - value A） of the setting range

     Example:
      Setting range: 0 ... 1 bar with one switch contact
      Repeatability: 1 % of 1 bar = 10 mbar
      Switch hysteresis = 15 mbar （see table setting ranges）
      Value A = 2 x 10 mbar + 15 mbar = 35 mbar
      If the pressure is rising, the switch point should be set between 35 mbar up to 1 bar.
      If the pressure is falling, the switch point should be set between 0 up to 965 mbar.
      For optimal performance we suggest the switch point lies between 25 % and 75 % of the setting range.

     Electrical connection
      ½ NPT female, cable connection using internal terminal block, protective conductor connection using internal and external screw, max. earth cable cross-section 4 mm2

     Pressure switch certified per:
      ■ Pressure equipment directive 97/23/EC （PED, annex 1, category IV, safety accessories, module B + D）
      ■ Low voltage directive 73/23 EEC and 93/68 EEC

     Dielectric strength
      Safety class I （EN 61298-2: 1997-06）

     Mounting
      Direct or wall mounting
      Preferred connection location of the process connection should be below.

     Weight
      approx. 10 kg

     Options
      ■ Other process connection, also with adapter
      ■ Sealings （model 910.17, see data sheet AC 09.08）
      ■ Electrical connection 3/4 NPT, G 1/2, G 3/4 or M20 x 1.5 （female）
      ■ Cable gland on request
      ■ 2" pipe-mounting kit （with clamping element）
      ■ Version for off-shore 3） or tropicalised application 3）
      ■ Accessories:
        Three-way or five-way valve

      3） Inert gas filled contacts required

     Approvals and certificates
      ■ GOST-R certificate
      ■ Test certificate *CA* （confirmation of the switching accuracy）
      ■ Test report *CP* （3-time listing of the switch point, requires switch point specification）
      ■ Material certificate 3.1 per EN 10204

     Ordering information
      Model / Switch contacts with version / Setting range / 2 x Process connection / Electrical connection / Switch point（s） / Switching direction（s） / Options
    

      Example: DA10 - U1 - 0/16 mbar - 2 x 1/4" NPT-F - 1/2" NPT-F