OPTOSIGMA GOH-25A40 Goniometer 25MM

( Brand: Optosigma ), ( Manufacturer Part Number: GOH-25A40 ), ( Type: Linear Positioner/stage ), ( Unit Type: Unit ), ( Country Of Origin: Japan )

Review OPTOSIGMA 25mm Goniometer Stage Excellent Condition Pcs

The **Optosigma GOH-25A40 25mm Goniometer** is a precision-engineered medical instrument designed to provide accurate and reliable measurements for assessing joint range of motion, particularly in clinical settings such as physical therapy, orthopedics, and rehabilitation. This high-quality goniometer is crafted with a durable, lightweight aluminum frame, ensuring both stability and ease of handling during assessments. The 25mm scale, clearly marked with precise gradations, allows clinicians to measure angles with exceptional precision, typically within a range of 0 to 180 , making it ideal for evaluating a wide variety of joints, including the knee, elbow, shoulder, and hip. The goniometer features a robust, non-slipfulcrum that minimizes movement during measurement, while its dual-axis design ensures accurate alignment with the body s anatomical planes. The sturdy, adjustable arms one fixed and one movable are designed to conform comfortably to the patient s anatomy, reducing the risk of measurement errors caused by improper positioning. Additionally, the GOH-25A40 is equipped with a clear, easy-to-read scale that enhances visibility, even in low-light conditions, while its compact and ergonomic design allows for effortless storage and portability. Whether used in a clinical practice, research setting, or home rehabilitation program, this goniometer delivers consistent and dependable results, making it an indispensable tool for professionals dedicated to assessing and improving joint function. Its durability and precision ensure long-term reliability, while its user-friendly features streamline the measurement process, ultimately contributing to more effective patient care and treatment planning.

The OptoSigma GOH-25A40 25mm goniometer is a precision instrument used primarily for measuring angles in mechanical, industrial, and quality control applications. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the OptoSigma GOH-25A40 25mm Goniometer**

1. **High Precision and Accuracy**

The GOH-25A40 is designed for high-precision angle measurement, typically offering accuracy within 0.1 or better, depending on calibration. This makes it suitable for applications requiring strict tolerances, such as machining, robotics, or metrology.

2. **Compact and Portable Design**

With a 25mm diameter, it is relatively small and lightweight compared to larger goniometers. This portability allows for easy integration into various setups or on-site measurements without requiring significant workspace adjustments.

3. **Digital Readout (Optional)**

Many models in the GOH series come with digital displays, which provide real-time angle readings in degrees or other units. This eliminates the need for manual interpretation of analog scales, reducing human error and improving efficiency.

4. **Durability and Build Quality**

OptoSigma is known for producing robust industrial instruments. The GOH-25A40 is likely built to withstand frequent use in harsh environments, including exposure to dust, vibrations, or temperature fluctuations, depending on the model variant.

5. **Versatility in Applications**

- Measuring angles in mechanical assemblies.

- Calibrating robotic arms or CNC machines.

- Inspecting parts for angular deviations in quality control.

- Assisting in alignment tasks (e.g., laser alignment, optical systems).

6. **Compatibility with Accessories**

The goniometer can often be paired with adapters, mounts, or software for extended functionality. For example, some models integrate with data logging systems or CAD/CAM software for automated workflows.

7. **Long-Term Reliability**

Given its industrial-grade construction, the GOH-25A40 is likely to have a long operational lifespan with minimal maintenance, provided it is used and stored correctly.

8. **User-Friendly Interface**

The design is straightforward, with clear markings and intuitive controls. Even for operators with limited experience, it can be used effectively with minimal training.

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### **Cons of the OptoSigma GOH-25A40 25mm Goniometer**

1. **Limited Measurement Range**

The 25mm diameter restricts the maximum angle it can measure accurately. While it may suffice for small-scale applications, larger angles or measurements on bigger components might require a larger goniometer (e.g., 50mm or 100mm models).

2. **Potential for Wear Over Time**

Like all mechanical instruments, repeated use can lead to wear on the pivot or scale. While OptoSigma instruments are durable, periodic recalibration or replacement of parts may be necessary to maintain accuracy.

3. **Cost Relative to Simpler Alternatives**

Compared to basic analog goniometers or protractors, the GOH-25A40 is more expensive. For applications where high precision is not critical, a cheaper alternative might suffice, potentially saving costs without sacrificing functionality.

4. **Calibration Requirements**

To ensure accuracy, the goniometer may need periodic calibration, especially in environments with significant temperature changes or mechanical stress. This adds to the maintenance burden and potential downtime.

5. **Learning Curve for Advanced Features**

While the basic usage is simple, mastering advanced features (e.g., data export, integration with software) may require training or familiarity with the accompanying documentation.

6. **Limited Customization**

The GOH-25A40 is a standard model, and customization options (e.g., specific mounting points, specialized scales) are limited. Users with unique requirements may need to invest in additional adapters or accessories.

7. **Potential for Misalignment During Use**

If not securely mounted or if the measurement surface is uneven, the goniometer may produce inaccurate readings due to wobble or misalignment. Proper setup is essential to avoid this issue.

8. **Dependence on External Power (for Digital Models)**

Some digital versions of the GOH series may require batteries or an external power source. This adds a layer of complexity, as users must manage power supply and potential battery life limitations.

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### **Conclusion**

The OptoSigma GOH-25A40 25mm goniometer is a high-quality, precision instrument well-suited for applications demanding accurate angle measurements in controlled or industrial environments. Its compact size, durability, and digital capabilities make it a strong choice for quality control, machining, and alignment tasks. However, its limitations such as the restricted measurement range, potential wear over time, and higher cost may not justify its purchase for applications requiring only basic or large-scale angle measurements.

For users prioritizing precision, portability, and reliability in a small form factor, the GOH-25A40 is an excellent investment. Conversely, those working with larger components or needing cost-effective solutions might consider alternative models or simpler tools.

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### **Recommendation**

- You require high-precision angle measurements for small to medium components.

- Your workflow involves quality control, calibration, or alignment tasks where accuracy is critical.

- You value durability and a compact, portable design.

- You are willing to invest in a reliable, long-term instrument despite the higher upfront cost.

- Your measurements involve very large angles or components that exceed the 25mm scale s practical range.

- Budget constraints make the goniometer prohibitively expensive, and simpler tools (e.g., digital protractors or larger goniometers) could meet your needs.

- Your environment is highly dynamic (e.g., extreme temperatures or vibrations), which may affect accuracy without proper calibration.

- You lack the resources or expertise to maintain and calibrate the instrument regularly.

For most professional or industrial users who need precision in a compact package, the GOH-25A40 is a worthwhile purchase. Always pair it with proper training and maintenance protocols to ensure optimal performance.

Details:

Optosigma part number: GOH-25A40. Guide method: Dovetail slide. Vernier scale for reading angular position. Excellent condition.

Goniometer with dovetail slide and worm gear construction for angular adjustment of heavy loads. Stage size: 25 MM. Finish: Super black chrome. Locking mechanism clamps dovetail to minimize movement.

Optosigma GOH-25A40, 25x25mm Goniometer, Brass Dovetail,1-Axis. Primary material: brass. This listings for 2 pieces.

part #: goh25a40 prices

• $225.00-$259.90

specifications linactuat:

• brand: Optosigma
• mpn: Goh-25a40
• type: Linear Positioner/stage
• unit type: Unit
• country of origin: Japan

offer linactuat:

• availability: In Stock
• sold: 0
• started: March 18, 2026
• options: Ship-to-home
• quantity: 1

general linactuat:

• Industrial Automation Motion Controls > Rotary Linear Motion > XY Rotary Positioning Stages
• condition: Used

returns linactuat:

• policy: No Returns

shipping linactuat:

• type: Fixed
• transit: 5-12 Days
• cost: $15.00
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard

payments linactuat:

• other
• credit card: Visa
• wallet: Apple-pay

seller linactuat:

• # reviews: 82
• rating: 100.0%
• city: Sunnyvale, California

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