{"product_id":"air-differential-pressure-switch-hvac-duct","title":"Air Differential Pressure Switch – Adjustable HVAC Duct Switch","description":"\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMultiple Adjustable Ranges from 20 Pa up to 5000 Pa\u003c\/li\u003e\n\u003cli\u003eScaled Dial Under Clear Cover for Quick Setting\u003c\/li\u003e\n\u003cli\u003eSenses Differential Air Pressure Across Two Ports\u003c\/li\u003e\n\u003cli\u003eSwitches an Output Contact When the Set Pressure Is Reached\u003c\/li\u003e\n\u003cli\u003eDuct Air-Pickup Probe and Sensing Tubes Included\u003c\/li\u003e\n\u003cli\u003eSurface \/ Wall Mountable Housing with Fixing Tabs\u003c\/li\u003e\n\u003cli\u003eCable Gland Wiring Entry\u003c\/li\u003e\n\u003cli\u003eDiaphragm-Type Mechanical Design\u003c\/li\u003e\n\u003cli\u003eIdeal for HVAC Ducts, AHUs, Fans and Filter Monitoring\u003c\/li\u003e\n\u003cli\u003eNo Separate Power Supply Needed to Operate the Contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAir Differential Pressure Switch\u003c\/strong\u003e is an adjustable pressure switch used to monitor the difference in air pressure between two points and switch an electrical contact when a set pressure is reached. Choose the range that suits your application — from 20 Pa up to 5000 Pa — and set the exact switching point using the scaled dial under the clear cover.\u003c\/p\u003e\n\u003cp\u003eIt is designed for HVAC and ventilation systems, where it is commonly used for airflow proving across fans, dirty-filter detection on air handling units, and monitoring duct or room pressure. The unit connects to the airflow through the included duct air-pickup probe and flexible sensing tubes, so it can be fitted to a duct or plenum during installation.\u003c\/p\u003e\n\u003cp\u003eThe switch uses a diaphragm-operated mechanism and a built-in changeover contact, so it does not need its own power supply to operate — it simply opens or closes your control or alarm circuit at the set pressure. The housing is surface mountable using its integral fixing tabs, with a cable gland for tidy wiring entry.\u003c\/p\u003e\n\u003cp\u003eSelect your required pressure range from the options above. Contact rating, ingress protection and exact dimensions are not marked on this unit; if your application needs specific electrical or IP figures, contact us before ordering and we will confirm suitability.\u003c\/p\u003e","brand":"ZZ Marts","offers":[{"title":"20–200 Pa","offer_id":52907586814264,"sku":"CMP-AIR-DPS-200","price":2400.0,"currency_code":"PKR","in_stock":true},{"title":"30–300 Pa","offer_id":52907586847032,"sku":"CMP-AIR-DPS-300","price":2500.0,"currency_code":"PKR","in_stock":true},{"title":"40–400 Pa","offer_id":52907586879800,"sku":"CMP-AIR-DPS-400","price":2550.0,"currency_code":"PKR","in_stock":true},{"title":"50–500 Pa","offer_id":52907586912568,"sku":"CMP-AIR-DPS-500","price":2600.0,"currency_code":"PKR","in_stock":true},{"title":"200–1000 Pa","offer_id":52907586945336,"sku":"CMP-AIR-DPS-1000","price":2800.0,"currency_code":"PKR","in_stock":true},{"title":"500–2500 Pa","offer_id":52907586978104,"sku":"CMP-AIR-DPS-2500","price":2950.0,"currency_code":"PKR","in_stock":true},{"title":"1000–4000 Pa","offer_id":52907587010872,"sku":"CMP-AIR-DPS-4000","price":3100.0,"currency_code":"PKR","in_stock":true},{"title":"1000–5000 Pa","offer_id":52907587043640,"sku":"CMP-AIR-DPS-5000","price":3500.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/3932\/4984\/files\/ChatGPTImageJul24_2026_04_49_03PM.png?v=1788527448","url":"https:\/\/zzmarts.com\/products\/air-differential-pressure-switch-hvac-duct","provider":"ZZ Marts | Zam Zam Traders","version":"1.0","type":"link"}