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NR Air Switch/General Sales


NR Air Switch/General Sales

  • Product Info
  • Literature


The IS2 and IS3 Series is an innovative low pressure sensing switch representing a cost effective alternative to popular models, and featuring the molded integration of various components, including the unique integrated Microswitch®


  • Low pressure sensitivity.
  • Setpoint range for IS2 of 0.10 in. wc (2.5 mm wc) to 5.0 in. wc (127 mm wc) Setpoint rangefor IS3 of 0.04 in. wc (1.0 mm wc) to 5.0 in. wc (127 mm wc)..
  • Integrated sampling line connectors for 1/4 in. inside diameter (ID) tubing.
  • Sample line connectors can be positioned at 15 degree increments.
  • Color-coded pressure ports.
  • Integrated screw bosses for mounting.
  • Integrated snap switches.
  • Integrated bleed holes.
  • Bar-coded labeling.
  • Optional Features
  • Integrated mounting tabs.
  • Data Matrix.
  • L-shaped or half-strap brackets.
  • 1/4 in. or 3/16 in. mixed or dedicated terminals.
  • Flow restricting orifices to dampen pressure surges.
  • Sample line connectors can be positioned on the flat surface or the standard perimeter locations.
  • 3/16 in. fitting (IS2 only).
  • Gold contacts for low electrical loads.
  • Custom brackets for single (IS) and dual (BA) switch models.

Product Specifications

Dimensions (in.)
2 17/32 in. Diameter
Dimensions (mm)
64 mm Diameter
Electrical Ratings
5A resistive @ 120 to 277 Vac; 28VA pilot duty @ 24Vac; 125 VA pilot duty @ 120Vac
Additional Features
Straight fittings; SPST NO contacts; Calibrated Setpoint
Electrical Connections
1/4 in. Quick-Connect
Ambient Temperature Range (C)
-40 C to +88 C
Ambient Temperature Range (F)
-40 F to +190 F
Connection Type
1/4 in. O.D. Straight
Switching Action
Contacts change position on Pressure Fall
1/10 HP @ 120 Vac to 277 Vac
Pilot Duty Ratings
28 Va @ 24 Vac; 125 Va @ 120 Vac
.10"±.05" wc PF
Overpressure Rating
14 in. w.c.
Electrical Switch
SPST N.O. 1/4 in.
Maximum Operating Pressure
3" wc