== 专业销售_FEMA压力开关_压力变送器_费玛压力开关_费玛压力变送器_菲玛压力开关_菲玛压力变送器

Technical data Pressure connection External thread G 1/2 (pressure gauge connection) according to DIN 16 288 and internal thread G 1/4 according to ISO 228 Part 1.Switching device Robust housing (700) made of seawater resistant die cast aluminium GD Al Si 12.Protection class IP 65, in vertical position.Pressure sensor materials Ex-DNM Metal bellows: 1.4571 Sensor housing: 1.4104 Ex-DCM4016/ Diaphragm: Perbunan Ex-DCM4025 Sensor
housing: 1.4301 Mounting position Vertically upright.Ambient temp. at switching device –20…+60 °C Max. medium temperature The maximum medium temperature at the pressure sensor must not exceed the permitted ambient temperature at the switching device. Higher medium temperatures are possible provided the above limit values for the switching device are ensured by suitable measures (e.g. siphon).Mounting Directly on the pressure line (pressure gauge connection) or on a flat surface with two 4 mm Ø screws.Switching pressure Adjustable from outside with screw driver.Contact arrangement Single pole change over switch.

The most important types of ignition protection for FEMA products are as follows:"Ex-d" pressure proof encapsulation EN 60079-1"Ex-e" enhanced safety EN 60079-7"Ex-t" protection via housing EN 60079-31 "Ex-i" intrinsically safety EN 60079-11 Pressure switches Specially designed FEMA Ex-protected pressure switches are available for use in ex-protection areas. They conform to these standards and are type-tested (Ex-d, Ex-e, Ex-t) and / or have been technically prepared for these areas (Ex-i)."Ex-d" Pressure-Proof Encapsulation 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.
"Ex-e" Enhanced Safety This type of ignition protection pertains to the special design of the terminal connection housing. The connection area is grouted and thus specially separated from the microswitch. A type tested terminal block, a type tested cable gland, and the IP65 protection degree all ensure an enhanced safety of "Ex-e" in the connection housing."Ex-t" Protection via Housing This type of ignition protection pertains to dust explosion protection and is based upon the reliable protection of ignition sources against atmospheric dust. For FEMA pressure switches and thermostats for use in dust explosion protected areas, a protection degree of IP65 is required. Together with devices according to "Ex-d" and "Ex-e," devices with "Ex-t" protection are approved for use in gaseous and dust laden atmospheres."Ex-i" Intrinsically Safety The equipment employed in explosion relevant areas are components of inherently safe electrical circuits. An electrical circuit is inherently safe if the amount of energy it contains is so small that no spark or other thermal effect can arise. This reliably prevents the ignition of explosive gas mixtures in the proximity of this equipment. In the context of this directive, pressure switches and thermostats containing no switching components with energy storage effects are referred to as "simple electrical equipment."

Ex-DCM4016 1…16 mbar 0,2 ... 2 mbar 1 bar Perbunan 4 + 11
Ex-DCM4025 4…25 mbar 0,2 ... 4 mbar 1 bar + 1.4301 4 + 11

Ex-DNM10 1…10 bar 0,05 ... 0,3 bar 25 bar 4 + 17
Ex-DNM63 16…63 bar 0,2 ... 2,0 bar 130 bar 4 + 16

DPS200 20...200 (Pa) 10 (Pa) ±5% (min. 5 Pa)
DPS400 40...400 (Pa) 20 (Pa) ±5% (min. 5 Pa)
DPS500 50...500 (Pa) 20 (Pa) ±2.5% (min. 5 Pa)
DPS1000 200...1000 (Pa) 100 (Pa) ±1%
DPS2500 500...2500 (Pa) 150 (Pa) ±1%