This sensor is coated with a luminescent material. Green light from an LED is transmitted to the sensor surface. The green light excites the luminescent material. As the material relaxes it emits red light. The time it takes for the red light to be emitted is measured. Between the flashes of blue light, a red LED is flashed on the sensor and used as an internal reference. Increased oxygen in the sample decreases the time it takes for the red light to be emitted. The time measurements correlate to the oxygen concentration.
Parameter Measuring range Accuracy Resolution Temp. compensation Working temp. Digital interface 0-20.00mg/L 0 to 200 % air saturation ±1% F.S 0.01mg/L DS18B20 digital temp sensor 0-40℃ MODBUS/RS485
0-20.00mg/L 0 to 200 % air saturation
DS18B20 digital temp sensor
The sensor is used for testing the dissolved oxygen in water, which can monitoring in many fileds like sewage treatment plant,aquaculture,food/chemical industry/power plant water treatment, the water environmental of river/lake/sea and so on.
Founded in 2008, Hangzhou Lohand Biological Technology Co., Ltd. Is a company that designs, develops, produces and sells water quality rapid test strips, reagents and precision testing instruments. It is located in Jianggan Science and Technology Park and relies on Zhejiang University Food Science and Technology Park and the West lake Science and Technology Park, focusing on technological innovation, has obtained a number of patents and produces provide customers with professional, fast, affordable and simple testing products and services to create a new history of water quality monitoring.
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
To complete your return, we require a receipt or proof of purchase.
There are certain situations where only partial refunds are granted (if applicable)
- The goods has been used.
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned more than 30 days after delivery
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at firstname.lastname@example.org and send your item to:Building 7, NO.63,JIUHUAN ROAD,JIUBAO STREET,HANGZHOU CITY Hangzhou, 310019 Zhejiang province,China.
To return your product, you should mail your product to: Buliding 7,NO.63,JIUHUAN ROAD,JIUBAO STREET,HANGZHOU CITY Hangzhou, 310019 Zhejiang province,China
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.