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INTRODUCTION: Series of AF930 Air Differential Pressure Switch can be used to sense (differential) pressure and flow of air in ducts and pipes. Typical applications include: l Filter obstructive alarm. l Maximum air flow controller for variable air volume systems. l Air proving in ventilation ducts. l Burner air control l Overheating protection for Electric Heater with blower Technical Specification: Type Adjust Range Return Difference Deviation [...]

1.High solar energy convert efficiency: over than 15% 2.Solar panel: polycrystalline silicon 3.Power: 2Watts 4.Output voltage: 5.5V 5.Output current: 360mA 6.Charging time: about 4 hours(the time is a little different for different mobilephone)" 7.open size: 260*123mm 8.fold size: 143*123*20 mm[...]

The Technologists from A.yite (America) Laboratory, have done much efforts to design portable ultrasonic flowmeter, we would like to supply suitable measurement for the travelling engineer. We design 2 type portable flowmeter for differential require, one is handhold ultrasonic flowmeter, the other is portable flowmeter. The Portable Flowmeter will be easy to move, suitable for a working team; the Handhold Flowmeter is easy pick up, suitable for single person. The ultrasonic flow meter works[...]

1. Features • High efficiency：15%~17% • Long life span. It is made of high quality solar silicon panel. • Easy to use. Put the solar panel in the sunlight directly and connect to the sock. The indicator light of laptop will be red when in use. • Convenience. It is foldable and portable. 2.Specification 　  open size: 480*460 mm  fold size: 220*150*25 mm  Power: 20W  Output：18V/1.2A  Solar panel: polycrystalline silicon  Charging time: about 3 to 4 hours[...]