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Wholesale Humidity Indicator Card in Industrial

 The humidity indicator spots will change from blue (dry condition) to pink (humid condition) as the relative humidity changes in the volume of air surrounding the indicator. Humidity indicator cards can be returned to a blue color by placing indicators in a sealed container with 33 grams (1 unit) of desiccant for four hours.

Humidity indicator card performance

1. Invertibility of discoloration: according to the availability of oxygen in the container, the color of oxygen indicator can be changed reversibly from blue to red, from red to blue for many times.

2. Reaction time of discoloration: when the oxygen indicator is used together with the deoxidizer, the oxygen indicator turns red within 4 hours from the oxygen concentration dropping to 0.1%;When oxygen enters from the outside, the oxygen indicator turns blue within 30 minutes.(at 25℃)

3. Indicating oxygen concentration range: when the oxygen concentration in the sealed container is less than 0.1%, the oxygen indicator is red;The oxygen indicator is blue when the oxygen concentration in the sealed container is above 0.5%

About the advantages of choosing our company.

1.We have our own factory as well as a professional team of workers, service and inspection.

2.We can send samples free of charge, but the freight will be paid by the customer.A sample fee is charged for 

custom goods, but refunds are available when the order reaches a certain amount.

3.All our products can be made and packaged according to your requirements.

4.Usually you should pay 30% deposit before production, the balance paid before shipping. For rhe small order, you 

need to pay the whole payment before production.

5.Any problems,we will try our best to find the best solution and give you a satisfying feedback.

6.We will produce after we confirm the payment.