1.Visual colorimetric or titration method ,fast and simple,without professional equipment and technical personnel.
2.The principle of detection base on the national standard method,the results are consistent with international standard.
3.Small size,light weight,suitble for field investigation.
4.Both seawater and fresh water can be detected,it has a wide range of applications.
Sulfur dioxide test paper
Test paper colorimetry
1.How about the shipping?
1) For sample order,it would sent by express company like UPS,Fedex,TNT etc.We have strong cooperation with them and if you have express collected account, you will no need pay us.
2) For bulk order,it would sent by sea.We have our cooperation forwarder and you also can use your OWN forwarder.
2.How can I get a sample ? What’s the sample fee? Is it refundable ?
Please confirm with us the model you’ll purchase, and you prepaid the sample fee , after sample tested and qualified, we will refund this sample fee when you place the bulk order. We can send out the sample within 2 working days after receiving payment.
3.What is your terms of payment ?
Payment 100% T/T, Western Union, L/C, Credit Card ect. in advance ,before shippment.
4.Can you send me some samples for review?
Yes, we can offer the samples,but shall have to charge the sample cost as well as the freight cost.The sample cost can be refunded after you place the orders.