Kobold DSS All Metal Flow Switches

Wiratama Mitra Abadi 01 19.19 flow measurement,

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
p_max: 250 bar (brass), 350 bar (stainless steel)
t_max: 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