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A401 Air Pressure Sensing Switch Differential Negative 20 ~ 150Pa
The A401 is an SPST NO air pressure sensing switch that can be used in the wall-hanging boiler furnace, gas water heater, HVAC system product, VAC system product, and so on.
A401 Air Pressure Switch
Air Pressure Sensing Switch Description
The A401 air pressure sensing switch is a single pole single throw normally open type switch with 2 forward terminals, which have 187#(4.8*0.5mm) and 250#(6.3*0.8mm) for your options. Kindly remind that the size of the terminals and direction is for the application to connect easily, if you have another requirement please feel free to contact us or visit our air pressure switch page to check.
Because of the patented design of the A4 series, we can control the pressure switch in a very small differential force, which is 10Pa which is smaller than most of the pressure switches on the market.
This air pressure sensing switch is the negative type whose working pressure range is from 20pa to 150pa and its set ON and set OFF pressure is available for customization. Meanwhile, the positive pressure type is also available. Besides, it also has a wide working temperature range(-40 to 110 ℃) so that it can reduce the effect of weather.
Generally, the A401 air pressure sensing switch can be used in the wall-hanging boiler furnace, gas water heater, HVAC system product, VAC system product, and so on. What’s more, if you need the electrical type air pressure sensors, please visit our product page.
A4 Air Pressure Switch Size

A401 Air Pressure Sensing Switch Specification
| 모델 번호 | A401 Air Pressure Sensing Switch |
| 작업 매체 | 공기 또는 배기가스 |
| 터미널 종류 | 표준 187 퀵 커넥트(4.8*0.5mm) |
| 튜브 인터페이스 | 외경 6.3mm로 내경 5mm 튜브에 적합합니다. |
| 회로 | SPST 번호 |
| 평가 | 1A 24VDC 및 0.5A 125/250VAC |
| 내전압 | 3000Pa(0.5Psi) |
| 전기 수명 | 25000000 사이클 |
| 가스 회수 배출구 | 부정적인 |
| 작동 온도 | -40℃ ~ +110℃ |











