Nanjing Wotian Technology Co., Ltd.

Pressure sensor manufacturing for 15 years.

Keywords: Nanjing WotianPressure Sensor FactoryMonocrystalline Silicon Differential Pressure SensorLevel TransmitterPressure TransmitterPressure Sensor

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  • Bellows
  • Bellows
  • Bellows



■ Lightweight

■ Seamless

■ Leak tight

■ Flexible


■ Hermetic seal

■ Volume compensation

■ Temperature sensors

■ Pressure sensors and pressure switches

■ Precision instruments

■ Connectors

electroformed electrodeposited metal bellows for pressure sensors pressure switches, China leak tight bellows

Electroformed electrodeposited metal bellows have features of lightweight, seamless, leak tight, flexible, applicable to hermetic seal application, pressure sensors, pressure switches, temperature sensors, connectors and precision instruments. 

Product Parameters

There are 5 kinds of metal bellows: rolled, hydroformed, welded, chemically deposited, electroformed. We electroplate metal onto a mandrel with aluminum material. The mandrel will be dissolved after electroforming. We have completed testing equipment like helium mass spectrometer.


In the process of plating, the mandrel acts as cathode, the electroformed material is anode. Controlling time, current, and current density can decide the electroform thickness.

Our bellows can be designed for compression stroke up to 50% of the free length. It is seamless, so no dust, dirt or moisture can get in.

Company advantage

Mass production

We have one production center in Nanjing and one production center in Anshan with 20,000㎡plant and 170 units of production equipments. The main annual capacity of sensors is about 2,000,000 pieces.

Imported equipments

We imported 20 sets of pressure controller and 150 units of testing ovens to our production line.

Informatization management

We have the information management system of CRM, PLM, ERP, MES and DINGDING etc.

Comprehensive testing

We have our own lab and testing equipment such as lightning stroke, surging, static electricity, vibration, high-low temperature impact test and helium mass-spectrum leak detection.