Pressure monitor (Ex-d) for hot water, steam, gas, fuel (Ex-DWR)

exdwr6ge51colres.jpg

exdwr6ge51bwhres.tif

FEMA negative pressure switches detect the pressure difference relative to atmospheric pressure. All data relating to the switching pressure ranges and thus also the scale divisions on the switching devices are to be understood as the difference in pressure between the releant atmospheric pressure and the set switching pressure. The "zero" reference point on the scale of the unit corresponds to the relevant atmospheric pressure. Degree of Ex-protection: Ex II 2G Ex d e IIC T6 Gb, Ex II 1/2D Ex ta/tb IIIC T80 ^oC Da/Db

Flame proof enclosure Switch components and other electrical functional units capable of igniting explosive gas mixtures are encapsulated in a housing which will survive the explosive pressure of an internal explosion and the special design of which prevents the transference of this explosion to the ambient atmosphere.

Kind of pressure

overpressure, relative

Pressure connection

internal thread G1/4, external thread G1/2

Electrical connection

terminal connection M16x1,5

Protection class

IP65

Housing material

rugged housing of seawater resistant aluminium die casting GD Al Si 12

Sensing element material

1.4104 + 1.4571

Media temp.

-25 ... 60 ^oC

Media temp. limit

60^oC. Higher temperatures are possible, provided that the limit is safeguarded by suitable measures (e.g. water tube trap, see Accessories for Pressure Switches / Transmitters)

Ambient temperature

-20 ... 60 ^oC

Ambient temp. limit

at temperatures below 0 ^oC, ensure that no water condensation can arise in the sensor and in the switching device

Switch function/capacity

SPDT Microswitch 250 Vac; capacity 2 A inductive, 3 A resistive

Certificates

•	TV.DWFS (SDBFS).17-281 according VdTUEV Memorandum Pressure 100, Issue 03.2017 and DIN EN 12952-11 and DIN EN 12953-9:2007
•	ID 0000035004 according DIN EN 764-7:2002 and DIN EN 13611:2008
•	CE-0085CL0343 according to DIN EN 1854, Issue 07.2006
•	01 202 931-B-11-0003 according Directive 97/23 EC
•	IBExU12ATEX1040 according ATEX 2014/34/EU
•	IECEx IBE 14.0077
•	SIL2 according IEC 61508-02