Precision Sensors
  Altitude Pressure Switches
Altitude Pressure Switch

Altitude Pressure Switch A45C Series

The A45C is our most sensitive skeletal (no pressure fitting) altitude switch for use with air or inert gas. This unit features a Ni-Span-C capsule for superior setpoint stability over a wide range of temperatures. Three standard mounting options are available: diamond bracket (shown), side bracket and integral tapped holes. Typical applications include aircraft cabin pressure systems, nitrogen radar cooling alarms and atmospheric research balloons.



Altitude Pressure Switch A45C Series

Media Air or Inert Gas
Type Factory Set
Sensor Type Capsule
Available Settings 0.2 to 20 PSIA
Deadband 0.15 to 0.8 PSIA
Repeatability ± 0.1 PSIA + 0.5% of Setting
Proof Pressure 20 PSIA
Operating Temp. Range -65° F to 160° F
Pressure Interface None (Ambient Sensor)
Typical Weight 0.08 lb
Electrical Rating Up to 7Amps @ 28 VDC
Electrical Connections Solder Terminals or
Free Leads
Qualification Consult Factory
Warranty 18 Months
Options 30 PSIA Proof
  • Ni-Span-C capsule reduces setpoint shifts caused by temperature changes
  • Easy to install - no plumbing to hook up 
  • Light Weight - < 1.5 oz (29 grams)
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  340 Woodmont Road
Milford, CT 06460
Tel: (203) 877-2795
Fax: (203) 877-8752