If you have questions about our products you own, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. High-Precision and Anti-Vibration Quartz Accelerometer For Aerospace ER-QA-02A: ◆Bias repeatability: 60ug; ◆Factor scale repeatability: 60ppm; ◆Class II non-linearity repeatability: 50μg/g2.