Cheap And Discounts Digital Differential Pressure Transmitter 4-20mA 0-10V 0-5V RS485 Wind Air Pressure Sensor 0-50pa 0-100pa 0-200pa 0-2Kpa Wholesale. Buy Directly From Merchant Shop1104482659 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.