Airswitch Product, Style E121, Adjustable Range .05" ± .02" wc to 12.0" wc PR. Yellow Label (Honeyw
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Airflow Differential Pressure Switches are used to sense positive, negative, or differential air pressure in HVAC systems. They provide high or low limit with alarm or high limit shutdown with manual reset.
• Models available with compression or barb fittings.
• SPDT contacts on automatic reset models SPST n.c. contacts on manual reset models.
• Electrical switch enclosed in metal box with cover.
• Reliable pneumatic operation. UL and CSA Listed, FM approved.
• Adjustable setpoint.
Description Airswitch Product, Style E121, Adjustable Range .05"±.02" wc to 12.0" wc PR. Yellow Label
Connection Type 1/4 in. Barbed
Setpoint .05"±.02" wc to 12.0" wc PR
Electrical Ratings 15 Amps resistive to 277 Vac
Electrical Ratings 10 Milliamps @ 5 Vdc
Electrical Ratings Gold Flash Contacts
Electrical Connections #6-32 Screw terminal with cup washers
Electrical Switch SPDT
Maximum Operating Pressure 1/2 psi
Additional Features Switching Differential: .02"±.01" wc @ minimum set point to approximately .80" wc @ maximum set point
Dimensions (in.) 5.0 in. Diameter
Dimensions (mm) 127 mm Diameter
Temperature Range, Ambient (F) -40 F to +190 F
Temperature Range, Ambient (C) -40 C to +88 C
Pilot Duty Ratings 278 Va @ 24 Vac
Pilot Duty Ratings 300 Va @ 120 to 277 Vac
Approvals, Underwriters Laboratories Inc Listed: MP2168
Approvals, Canadian Standards Association CSA file No. LR45785
Replaces Part Numbers:
AASAP520830 AP5028-30 AP502830