Pressure sensors and switches for HVAC, ventilation and control systems. From ZZ Marts, Karachi and Lahore, with nationwide delivery.
Buying guide
Frequently asked questions
How much does an air pressure switch cost in Pakistan?
At ZZ Marts, the KFR-1 air pressure switch for gas water heaters and boilers costs Rs 950. The adjustable air differential pressure switch for HVAC ducts costs Rs 2,400 to Rs 3,500, depending on the pressure range you choose.
What does the air pressure switch in a gas water heater do?
It proves that the fan or flue draught is working before the heater ignites. The KFR-1 switches its changeover contact (NC / NO / C) at about 39/55 Pa (0.9 mbar), with a maximum of 10 mbar. Before ordering a replacement, check the pressure rating and port layout against your original switch.
What is an air differential pressure switch used for?
It measures the difference in air pressure between two points and switches a contact when the pressure you set on its dial is reached. It is used on HVAC ducts, air handling units, fans and filter monitoring, and needs no separate power supply to operate the contact.
Where can I buy pressure switches in Karachi and Lahore?
From ZZ Marts (Zam Zam Traders), with stores in Saddar, Karachi and Garhi Shahu, Lahore, and delivery across Pakistan. If you are matching a part, send a photo of the old switch on WhatsApp before ordering.