Foshan Weller Moisture Proof Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of indicating silica gel in China. If you're going to wholesale high quality indicating silica gel, welcome to get free sample and discount information from our factory. We also accept customized orders.

China Indicating Silica Gel manufacturers and suppliers since 2009, with our own factory. Accept wholesale, OEM, ODM orders. Provide custom solutions.

Indicating Silica Gel Manufacturers

This indicating silica gel shows a more convenient function. You can visually check the moisture absorption status through color changes. It prompts users to replace or regenerate. This desiccant has the advantages of high moisture absorption, high safety, environmental protection, and reusability. Therefore, it is widely used in medicine, food, electronics, precision instruments and other fields.

Noted: We can custom silica gel desiccant for specific application.

Parameter	Blue Indicating Silica Gel	Orange Indicating Gel
Particle Size	2-5 mm (standard)	1-3 mm (standard)
Bulk Density	720-750 kg/m³	680-710 kg/m³
Moisture Adsorption	30-32% @25°C, RH90%	28-30% @25°C, RH90%
Color Change Point	RH ≥40%	RH ≥20-30%
Working Temperature	-40°C to +150°C	-40°C to +150°C
Regeneration	120-150°C (2-3 hrs)	120-150°C (2-3 hrs)
pH Value	4-6 (weakly acidic)	4-6 (weakly acidic)
Indicator Content	0.5-1.0% CoCl₂	0.3-0.8% organic indicator
Toxicology	Contains cobalt (handle with care)	Cobalt-free options available

Moisture Absorption Comparison

Parameter	Blue Indicating Silica Gel	Orange Indicating Gel
Absorption Capacity	30-32% @25°C, RH90%	28-30% @25°C, RH90%
Color Change Threshold	RH≥40% (Blue→Pink)	RH≥20-30% (Orange→Green)
Optimal Humidity Range	Standard humidity (RH≥40%)	Low humidity environments (RH≥20-30%)
Absorption Rate	Slower (steady absorption)	Faster (more sensitive to low humidity)

Notes：

Blue gel has slightly higher total capacity, while orange gel responds faster to low humidity
Actual performance depends on temperature, sealing conditions, and initial humidity.

Applications

Application Scenario	Blue Indicating Silica Gel	Orange Indicating Gel
General Industrial Moisture Control	✅ Ideal • Machinery parts anti-rust • Large equipment packaging • Shipping containers (1-2kg/20ft)	❌ Not recommended (Over-specification)
Electronics Component Protection	❌ Unsuitable (Insufficient sensitivity)	✅ Optimal Choice • Semiconductor packaging • PCB storage • Optical lens protection
Food/Pharmaceutical Packaging	❌ Prohibited (Contains cobalt chloride)	✅ Must Use Cobalt-Free Version • Medicine bottles • Food preservation (FDA compliant)
Precision Instrument Protection	❌ Inadequate	✅ Essential • Medical equipment • Laboratory instruments • Military devices
Lithium Battery Production/Storage	❌ Strictly Prohibited (Cobalt contamination risk)	✅ Industry Standard • Battery dry rooms • Battery pack encapsulation
Consumer Goods Moisture Protection	✅ Cost-Effective • Apparel/footwear • Leather products • Household items	❌ Not Cost-Efficient
Aerospace Applications	❌ Non-Compliant	✅ Critical Applications • Avionics moisture control • Satellite components
General Laboratory Drying	✅ Basic Use • Chemical reagent bottles • Common lab equipment	✅ Premium Option • Precision analyzers • Humidity-sensitive experiments
Construction (Short-term Drying)	✅ Economical • New building dehumidification • Pipe condensation prevention	❌ Not Economical

Critical Notes

Blue gel's cobalt may contaminate batteries, food, and pharmaceuticals.
In clean rooms (Class 1000+) , it requires orange gel exclusively.

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About Us

Foshan Weller Moisture-Proof Technology Co., Ltd. was established in 2009. We are a professional manufacturer and supplier in China, with an factory of over 8,000 square meters.

Product Range	moisture-proof, mildew-proof, odor-proof and rust-proof products.
Applications	designed for residential, commercial and industrial use. used for product packaging, transportation, and warehousing in different industries.
Service	Accept wholesale, OEM, ODM orders; Provide custom solutions.
Certifications	SGS, RoHS, REACH, FDA, DMF; SIMT,MIL-D-3464E, DIN55473, ISO9001, ISO14001, BSCI.

Product Details and Summary

Product Type	silica gel desiccant (moisture absorbing material)
Classification	1. non-indicating silica gel 2. indicating silica gel (1) blue indicating silica gel (blue to pink; containing cobalt chloride) (2) orange indicating silica gel (orange to green; cobalt free and environmentally friendly)
Indicator Function	You can choose silica gel with color indication function, to achieve a more convenient reminder function.
Main Components	silicon dioxide (SiO₂); Content ≥ 98%
Appearance	granular, spherical, powdered, beads crystals, sand, etc.
Colors	transparent, translucent, white, blue, or orange
Particle Size	1-3mm, 2-4mm, 3-5mm; or custom sizes
Bulk Density	approximately 700-800 kg/m³
Surface Area	700-800 m²/g
Pore Volume	0.4-0.8 cm³/g
Applicable Humidity Level	20%-90% RH
Operating Temperature Range	-40 ℃ to 200 ℃ (long-term stability)
Maximum Moisture Absorption Rate	30%-40% of its own weight
Physical Properties	stable internal structure. no expansion or liquefaction. not easily crushed. dust-free.
pH	4-8
Chemical Properties	chemically inert; It will not chemically react with the inside products.
Human-Friendly Feature	odorless and non-toxic. It meets food grade standards.
Environmentally Friendly Feature	using packaging paper and materials that are biodegradable within two years. It can be discarded for use as fertilizer.
Regeneration Temperature	80℃-150 ℃ ( It can be reused after heating for 2-4 hours.)
Packaging Material	breathable material with strong sealing properties. You can customize packaging materials according to your needs.
Printing	You can custom printed text, pictures, logo for better brand images.
Packaging Capacity	1g, 2g, 5g, 10g, 50g, 100g, 500g, 1000g; or custom capacity
Storage	It should be tightly sealed and stored in a cool, dry place; away from direct sunlight and chemical pollution.
Certifications	SGS, RoHS, REACH, FDA, DMF; SIMT,MIL-D-3464E, DIN55473, ISO9001, ISO14001, BSCI.