Technical data Pressure connection External thread G 1/2 (pressure gauge connection) to DIN 16 288 and internal thread G 1/4 to ISO 228 Part 1 (for gas applications internal thread permissible only up to 4 bar). Switching device Rugged housing (200) made of seawater resistant die cast aluminium. Materials Pressure bellows: Material no. 1.4571 Sensor housing: Material no. 1.4104 Switch housing: GD AI Si 12 (DIN 1725) Mounting position Vertically upright and horizontal. Ambient temperature at switching device –25 to +70°C, Medium temperature –25 to +70°C. The maximum medium temperature at the pressure sensor must not exceed the permitted ambient temperature at the switching device. Temperatures may reach 85°C for short periods. 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. Calibration The DWR series is calibrated for rising pressure. This means that the adjustable switching pressure on the scale corresponds to the switching point at rising pressure. The reset point is lower by the amount of the switching differential. (See also page 23, 2. Calibration at upper switching point). In version ...-203 the switching differential is adjustable. The basic calibration is maintained. Bursting pressure For all types ≥ 100 bar, verified by TÜV test. Switching differential For values see Product Summary. Contact arrangement Single pole change over switch. Protection class IP 54 according to DIN 40 050 Switching 250 VAC 250 VDC 24 VDC capacity (ohm) (ind) (ohm) (ohm) Normal 8 A 5 A 0.3 A 8 A SIL 2 according IEC 61508-2 Type Setting range Switching differential (Tolerance) Maximum working pressure Dimensioned drawing Pressure monitors without differential adjustment p. 21 + 22 DWR06 0,1…0,6 bar 10 ... 50 mbar 6 bar 1 + 15 DWR1 0,2…1,6 bar 40 ... 100 mbar DWR3 0,2…2,5 bar 40 ... 160 mbar 16 bar 1 + 18 DWR6 0,5…6 bar 0,08 ... 0,3 bar DWR625 0,5…6 bar 0,08 ... 0,3 bar 25 bar 1 + 17 DWR16 3…16 bar 0,2 ... 0,6 bar DWR25 4…25 bar 0,3 ... 1,5 bar 63 bar 1 + 16 DWR40 8…40 bar 0,8 ... 1,6 bar Switching differential adjustable DWR06–203 0,1…0,6 bar 0,08 … 0,5 bar 6 bar 1 + 15 DWR1–203 0,2…1,6 bar 0,15 … 0,6 bar DWR3–203 0,2…2,5 bar 0,17 … 1,4 bar 16 bar 1 + 18 DWR6–203 0,5…6 bar 0,3 … 1,7 bar DWR625–203 0,5…6 bar 0,4 … 2,5 bar 25 bar 1 + 17 DWR16–203 3…16 bar 0,75 … 3,15 bar DWR25–203 4…25 bar 1,3 … 6,0 bar 63 bar 1 + 16 DWR40–203 |
