- TOKYO, Japan, May 26, 2025 -

Seiko Epson Corporation (TSE: 6724, "Epson") has expanded its lineup of inertial measurement units¹ (IMU) equipped with high-performance, six degrees of freedom sensors. The new M-G355QDG0("M-G355" below) is a functional safety compliant IMU with the international standard IEC 61508 SIL1 that is now in volume production and began shipping in May 2025.

First launched in 2011, Epson's IMUs have been used in an array of customer applications, from precision agriculture (GNSS²), low earth orbit small satellites using consumer or industrial components, and EO/IR camera gimbals³ to antenna platform vibration control and stabilization, earning an excellent reputation for outstanding performance and quality. Recently, in addition to their basic characteristics, the demand for products that perform safety functions is increasing. Along with that, the demand for IMUs to be designed and produced in compliance with international standards is increasing.

The new product M-G355 is based on the conventional 1-inch product M-G366PDG0 ("M-G366" below) and is the first of our IMU products to comply with IEC61508 SIL1 standards. Compliance with this standard allows for application in various industrial fields that require high stability and high reliability.

By expanding and enhancing its lineup of one-inch platform products, Epson is giving customers more options, allowing them to choose a product that has the best functions and performance for their particular needs and applications.

Given the social and technological changes that are underway, Epson believes that the need for precision sensors will only expand going forward. We will continue to leverage our philosophy of efficient, compact, and precise innovation to provide small, lightweight, low-power sensing systems that offer outstanding precision, high stability, and low noise to significantly contribute to our customers' products and services.

• Compliance with IEC61508 SIL1 standards
• One-inch platform (24 x 24 x 10 mm³)
• Maintaining compatibility with conventional products (M-G366), it significantly reduces customer development costs and evaluation periods.

• Navigation systems (GNSS, INS⁴, high-precision locators), etc.
• Unmanned vehicles (industrial drones, terrestrial vehicles, sea probes, etc.)
• Industrial equipment(measurement of vibration, angle, and trajectory)

Please see the link below for further product details.

https://global.epson.com/products_and_drivers/sensing_system/

Note: The specified values are typical values unless stated otherwise.

• ¹ Inertial measurement unit (IMU)
  An IMU is a device that is used for sensing inertial motion. It is comprised of triaxial angular rate sensors and triaxial accelerometers.
• ² A global navigation satellite system (GNSS)
  A satellite system that is used to pinpoint a geographic location anywhere in the world
• ³ EO/IR camera gimbal
  An electro-optical, infrared camera system
• ⁴ INS(Inertial Navigation System)
  Inertial navigation system
• ⁵ Gyroscopic sensor (angular rate sensor)
  Measures the rotation angle (angular rate) of an object versus a reference axis per unit of time
• ⁶ Bias instability
  The part of the Allan variance* that represents the horizontal (zero power) characteristic is called bias instability. It correlates with 1/f noise and is one of the important indicators of sensor potential.
• ⁷ Angle random walk
  The part of the Allan variance with a slope of -1/2 is called the angle random walk. Since there is a correlation with white noise, increasing the average time decreases the value at -1/2 of the average time.
• * Allan variance
  An indicator of sensor performance, the Allan variance indicates the stability of the static output. The horizontal axis shows the averaging time of data, and the vertical axis shows the distribution of the average value when separated by the average time.
  It is known that the slopes of the characteristics appearing in the Allan variance are -1, -1/2, 0, 1/2, and 1st power slopes, the Allan variance correlates with the noise density, and the noise density is the frequency. Allan variance is an indicator expressed in time. The smaller the value, the higher the stability and the better the performance.

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