CN — TechNode

China’s Magnetic-Sensor Champion Bets on Robot Joints

RoboticsOctober 20, 20262 min read

Sinomags, a Chinese maker of magnetic sensors, is preparing for a Hong Kong stock market listing (IPO). It wants to use the money to grow its sensors for robots and upgrade its German factory.

What happened

Sinomags is getting ready to sell shares to the public in Hong Kong. A draft listing document was published in September, after the company's listing hearing. The company says it is first among Chinese magnetic sensor makers and tenth in the world, with a 0.6% market share. The company plans to use the money to expand precision sensors for robots and to upgrade its factory in Germany.

Key numbers

Market rank: 1st among Chinese magnetic sensor companies, 10th globally, with a 0.6% market share (2025 revenue, based on Frost & Sullivan data).
Current sensors made up 82.6% of Sinomags' revenue in 2025.
Sinomags ranked 2nd globally in TMR sensors, with a 4.7% share.
Sinomags ranked 4th globally in current sensors, with a 3.3% share.
The company acquired Germany's Sensitec in 2021.

What magnetic sensors do

Magnetic sensors help machines sense things they cannot see. They measure electric current, find position and track movement. A current sensor in a solar inverter watches the electricity flowing through it. A magnetic encoder in a robot joint tells the machine where the joint is and how it moves. Sinomags started in Ningbo in 2013, using research in magnetic materials and electronics. Solar power and electric cars were its first big markets.

Why it matters

Robots need small, reliable parts that measure position well every time. If Sinomags grows in robot sensors, it could move beyond its current energy and car markets. Owning more of its production, from chip design to wafer making to final modules, also gives it more control over quality. The listing will show whether its technology can turn into a bigger and more profitable business.

What to watch

Whether the Hong Kong IPO goes ahead and how much money it raises.
How fast sales of precision sensors for robots grow.
Whether the upgrade of the German Sensitec factory goes as planned.
Whether Sinomags becomes more profitable as it grows.

Glossary

IPO: Initial public offering: when a company first sells shares to the public on a stock market.
Sinomags: A Chinese maker of magnetic sensors that measure current, position and movement.
Sensitec: A German sensor company, founded in 1999, that Sinomags bought in 2021.
TMR: Tunnelling magnetoresistance: a sensor type that detects magnetic fields by changes in electrical resistance.

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