Oriental Instruments & Dongyi Technology

Targeting global production of helium leak detection equipment; independently developed quality flow meter filling machines, with customers spread across various domestic refrigeration enterprises, enjoying high recognition in the industry.

Honorary Qualifications


A MOS switch isolation circuit for over-temperature protection of an electromagnetic valve

A MOS switch isolation circuit for over-temperature protection of an electromagnetic valve

A uniform temperature vacuum heating box

A uniform temperature vacuum heating box

A type of container leak detection device

A type of container leak detection device

A vacuum drying and degreasing device

A vacuum drying and degreasing device

A micro-pressure differential leak detection device

A micro-pressure differential leak detection device

General Leak Detection Device

General Leak Detection Device

A three-hole connector that prevents vacuum glow discharge

A three-hole connector that prevents vacuum glow discharge

A high-precision leak detection device

A high-precision leak detection device

A long-distance refrigerant delivery pressure stabilizing device

A long-distance refrigerant delivery pressure stabilizing device

A vacuum tube de-icing and dehumidifying device

A vacuum tube de-icing and dehumidifying device

An AC voltage signal sampling circuit for vapor deposition power supply

An AC voltage signal sampling circuit for vapor deposition power supply

A pneumatic integrated valve for helium recovery pipelines

A pneumatic integrated valve for helium recovery pipelines

Online message

The main products of our company now include refrigerant filling machine, explosion-proof filling machine, vacuum purification filling machine, special power supply, helium inspection equipment, etc.

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