“ In 2020 we bought Ozone sensor ZE14-O3 for our vehicle air quality product. After two years use and storage,we retested the sensor, great surprise it’s still working well, tolerance even under ±10%. We evaluate its life could be 3 to 5 years although the manual gives 2 years in the air. Winsen is a reliable partner with high standard on quality. Our company has decided to use their sensors on more products. ”

“ These 10000pcs of CO2 sensors have been delivered with their cable harness in two weeks to America,well packaged and protected in anti static bag and foam in carton boxes. Thank you Winsen! ”

“ Excellent support! Fast delivery came with calibration check report. Accurate sensors and very responsive supplier. This is Winsen official, very recommendable. ”