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                AIR SENSING SWITCHES
2374 SERIES ADJUSTABLE AIR
 Both models are provided with an SPDT switch that can be actuated by positive or negative pressure, or by pressure differential. They are U.L. and C.S.A. approved. Provided with mounting hardware and an adjustment tool for easy installation and calibration.
  Electrical rating: SPECIFICATIONS • 5 amp noninductive 120-277 VAC,
 5 amp noninductive 28 VDC, 1 amp pilot duty 120 VA SENSING SWITCHES • Maximum pressure .5 PSI
• Ambient temperature -40°F to 190°F (-40° to 88°C) • Operating (mounting position) diaphragm vertical
• Switch SPDT • Electrical connections 1/4" spade
• Air sample line connectors 1/8", 1/4" or 3/8" tubing
 Part No.
Set Point Range
                  2374-495 2374-498 1003687 1149483
.25 TO 1.0" W.C.
1.0 TO 4.0" W.C.
1/8 ID 24” Red Pressure Hose 1/4 ID Pressure Hose
            PS221 PS415
770-1               PS400
              PS000
Part No. Description Range
  PS000 PS221
Field Adj. 0.10” to 10.0” wc. Fixed Set Pt. On Press. Rise
Temp. Range
Rating
PS606
1/4hp@125VAC 1/2hp@250VAC
Part numbers and illustrations are for identification only © 1971 - 2018 w.d. armstrong corp.
-40F to 190F -40F to 180F
1/10hp@120-277VAC
PS460
       770-1 PS400 PS415 PS460
PS606
258
At 0.05±0.02"w.c. Field Adj. 0.05"wc To 12.0"wc.
-40F to 180F -40F to 180F -40F to 180F --------
15 Amps noninductive 277VAC 300VA Pilot Duty 115-277VAC 60Hz
 Field Adj. 0.15"wc To 5.0"wc. Field Adj.   0.15"wc To 5.0"wc. Field Adj.     0.40"wc To 12.0"wc.
                  Manual Reset
Universal Air Flow Sample Probe & Tubing Kit
   





























































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