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Kobold DSS All Metal Flow Switches

Kobold DSS All Metal Flow Switches Application in hazardous areas

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.

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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