Suzhou Yosemite Technologies Ltd.  

Product Name: Oxygen Membrane Cap Model NO.: Y9005 Type: Accessories Certification: ISO9001 Portable: Non Portable Appliance: Water Analysis Display: Digital Trademark: Yosemitech Transport Package: Box Origin: China Product Description Oxygen membrane capWhen blue light excites sensor film, the sensing film emits red light.The phase difference between the blue excitation and returned red emission is measured, and the result is used to calculate DO concentration.