Kobold DSS All Metal Flow Switches

Kobold DSS All Metal Flow Switches operate on the suspended float principle, however not with a tapering measuring tube, but with a cylindrical float and a slotted conical nozzle. This technology allows a very much more compact construction and offers considerable price advantages.

Kobold DSS All Metal Flow Switches Application in hazardous areas

Mechanics: The apparatus can be used as follows in explosive atmospheres in accordance with the applicable erection regulations on machines, devices, and plants, such as e.g. EN 1127-1, EN 60079-14 etc.:

  • In Zone 1 (gas hazard, category 2G) in the explosion groups IIA, IIB, and IIC
  • In Zone 2 (gas hazard, category 3G) in the explosion groups IIA, IIB, and IIC
  • In Zone 21 (dust hazard, category 2D) in the explosion groups IIIA and IIIB
  • In Zone 22 (dust hazard, category 3D) in the explosion groups IIIA and IIIB

Switching range: 0.05 – 1.0 … 10 – 110 l/min water
Connection: G ¼ … G 1¼, ¼ … 1¼” NPT  female thread
Material: brass, stainless steel
pmax: 250 bar (brass), 350 bar (stainless steel)
tmax: 100°C
Accuracy: ±5 % of full scale

Kobold DSS All Metal Flow Switches Technical Details

  • Housing:
    DSS-11…: brass, Ms 58
    DSS-12…: stainless steel, 1.4301
  • Connections:
    DSS-11…: brass, Ms 58
    DSS-12…: stainless steel, 1.4301
  • Float:
    DSS-11…: brass, Ms 58
    DSS-1101: PP
    DSS-12…: stainless steel, 1.4301
    DSS-1201: PVDF
  • Nozzle:
    DSS-11…: brass, Ms 58
    DSS-12…: stainless steel, 1.3955
  • Seals:
    DSS-11…: NBR
    DSS-12…: FPM
  • Max. temperature: 100°C
    DSS-1101… / DSS-1201..: 70°C
  • Max. pressure:
    DSS-1101… / DSS-1201..: 16 bar
    DSS-11…: 250 bar
    DSS-12…: 350 bar
  • Installation position: vertical, upward flow
  • Accuracy: ±5% of full scale
  • Repeatability: ≤1%
  • Contact: bistable reed contact
  • Electr. connection:
    2 m cable (DSS-…F0…)
    for all other models : connector DIN EN 175301-803
  • Electrical switching values:
    N/O contact
    max. 250VAC/DC /1.5A/100W/100VA
    changeover contact
    max. 250VAC/DC /1A/30W/60VA
    N/O contact and
    changeover contact (cCSAus)
    max. 230VDC /0.26A/60W,
    60VDC /1A/60W,
    max. 240VAC /0.42A/100W,
    100VAC /1A/100W
  • Protection: IP65

Electrical contacts

  • ATEX contact …F0:
    II 2 G Ex mb IIC T6 Gb
    II 2 D Ex mb IIC T80°C Db
    max. 250 VAC/1,5 A/100 VA
    IECEx BVS 07.0007X
  • ATEX N/O contact type 41R57 …G0 and GG:
    II 3 G Ex ic IIC T4 Gc
    II 3 D Ex ic IIIC T125°C Dc
    -20°C ≤Ta ≤80°C
    max. 250 VAC/DC/1,5 A/100 W/100 VA
  • ATEX changeover contact type 41R57U …H0 and HH:
    II 3 G Ex ic IIC T4 Gc
    II 3 D Ex ic IIIC T125°C Dc
    -20°C ≤Ta ≤80°C
    max. 250 VAC/DC/1 A/30 W/60 VA
    Hysteresis: approx. 3.5 mm float movement
    Protection: IP 65 electr. contacts

Download Datasheet: Kobold All Metal Flow Switches DSS

Reference : kobold.com

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