Dwyer Sales Department: 1-201-419-6111 ext. 26 for Sales Group  |  dwyer@nciweb.com


 

Dwyer Series A1 Low Cost OEM Pressure Switch

316 SS Diaphragm. Optional Weatherproof Enclosure. Ranges from 3-20 to 50-500 psig
Low Cost and Precision Made, The A1 Pressure Switch is ideal for panel mounting wherever a high quality, economical open case control is required. Perfect for a wide range of applications in industrial service, the compact Series A1 control is available with field adjustable operating ranges from as low as 2-20 psig up to 50-500 psig (14-140 kPa to 345-3450 kPa). A convenient indicating scale is included, allowing quick and easy field adjustment of the actuation point. The rugged A1 construction incorporates the feature most often requested by customers; a 316 stainless steel diaphragm pressure element for exceptional compatibility and long service life. Standard pressure chamber is aluminum with a Teflon® impregnated hard coating, perfect for oil based hydraulic fluids and non-corrosive air and gases. Choose optional brass chamber for water and water-based fluids or 316 stainless steel for harsher applications. Optional weatherproof housing meets NEMA 4X standards.
 
click image to enlarge
 
-- APPLICATIONS
 
Chemical petroleum, food and drug processing industries. Used indoor, outdoor or in explosion-proof area.
 
-- PHYSICAL DATA
 
  • Maximum Pressure: 750 psig (5171 kPa)
  • Temperature Limits: -40 to 180°F (-40 to 82°C)
  • Mounting and Process
  • Connections: 1/8" NPTF x 1/2" NPTM
  • Switch Type: SPDT snap action
  • Electrical Connections: 3 screw terminals
  • Electrical Ratings: 15 A @ 120/240/480 VAC,
  • 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC
  • Setpoint Adjustment: Knurled screw cap (Deadband is fixed)
  • Chamber Material: Anodized aluminum std.
  • Optional; brass or 316SS
  • O-ring Material: Viton
  • Diaphragm: 316 stainless steel
  • Installation: Within 20° of vertical
  • Weight: 9 ounces (.25 kg)
  • Approvals: Recognized component under UL 508
 
-- MODELS NUMBERS (stock shown in bold)
 
Model
Number
Range, PSIG Range, kPa Deadband in psig (kPa) at min./max.
 A1S-O-AL-1-1  3-20  14-140  1/3 (7/21)
 A1S-O-AL-1-2  15-150  103-1030  5/15 (34/103)
 A1S-O-AL-1-3  25-250  172-1720  8/25 (55/172)
 A1S-O-AL-1-4  50-500  345-3450  15/50 (103/345)