Model 1950 Explosion-proof Differential PressureSwitch combines the best features of the popular Dwyer® Series 1900Pressure Switch with an integral explosion-proof and weatherproof housing,making it an exceptional value for either application. It is CE, UL and CSAlisted, FM approved for use in Class I, Div 1, Groups C and D, Class II GroupsE, F, and G and Class III hazardous atmospheres NEMA 7 & 9. Raintight NEMA 3(IP54). Weatherproof features include a drain plug and O-ring seal in cover.Electrical connections are easily made by removing front cover. For conveniencethe set point adjustment screw is located on the outside of the housing. Twelvemodels offer set points from .03 to 20" w.c. (7.5 to 5 kPa) and from .5 to60 psi (0.035 to 3.5 bar). The unit is very light and compact – about half theweight and bulk of other explosion-proof or weatherproof switches with separateenclosures.
CAUTION: For use only with air orcompatible gases. Applications with hazardous atmospheres and a single positivepressure may require special venting.
EXAMPLE | 1950 | 02 | 2 | S | AT | Series 1950-02-2S-AT Explosion-proof Differential Pressure Switch, range 0.03-0.10" w.c., mica silver contact micro switch, silicone diaphragm, with aluminum tag. |
SERIES | 1950 1950P | Explosion-proof Differential Pressure Switch (for Inches w.c. Ranges) Explosion-proof Differential Pressure Switch (for psid Ranges) | ||||
RANGE | 02 00 0 1 5 10 20 2 8 15 25 50 | 0.03-0.10" w.c. 0.07-0.15" w.c. 0.15-0.5" w.c. 0.4-1.6" w.c. 1.5-5.5" w.c. 3.0-11.0" w.c. 4.0-20.0" w.c. 0.5-2.0 psid 1.5-8.0 psid 3.0-15.0 psid 4.0-25.0 psid 15.0-50.0 psid | ||||
MICRO SWITCH TYPE | 2 6 M | 10G Mica Silver Contact 10G Phenolic Gold Contact 10G Phenolic Silver Contact | ||||
DIAPHRGM MATERIAL | B F N S V | Buna-N Fluorosilicone Neoprene Silicone Fluoroelastomer | ||||
OPTIONS | AT PRESET ST | Aluminum Tag Preset Stainless Steel Tag |
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