The Balance Mechanical Ohaus Double Pan HJ2001-200 x 0.5G is likely a precision mechanical scale designed for accurate weighing in various applications. Here are some features commonly associated with this type of balance:

1. Capacity: The “200 x 0.5G” indicates the scale’s maximum capacity of 200 grams with a precision of 0.5 grams. This precision makes it suitable for applications where high accuracy is required.
2. Dual-Pan Design: The scale likely features two pans, one on each side of the balance beam, allowing for comparative weighing or double-checking measurements.
3. Durable Construction: Constructed from durable materials such as metal or robust plastic, ensuring longevity and reliability in various environments.
4. Easy-to-Read Dial: Instead of a digital display, this scale likely features a dial or pointer system for displaying weight measurements, providing clear and easy-to-read results.
5. Zero Adjustments: The scale may have a zero adjustment knob or screw, allowing you to calibrate it to ensure accurate measurements before each use.
6. Adjustable Feet: Some models come with adjustable feet to ensure stability on uneven surfaces, improving accuracy during weighing.
7. Magnetic Damping: Magnetic damping systems are common in precision mechanical balances. They dampen the oscillations of the balance beam, allowing for quicker stabilization and more accurate readings.
8. Portability: While not as compact as digital scales, mechanical balances like this one are often relatively portable, making them suitable for fieldwork or environments without access to power.
9. Versatility: These scales can be used for a wide range of applications, including laboratory work, educational purposes, and commercial settings.
10. Calibration Weights: Some models may come with calibration weights to ensure accurate measurements and allow for periodic recalibration.
11. Level Indicator: Some models may have a built-in level indicator to ensure the scale is placed on a flat surface, minimizing measurement errors.
12. Stainless Steel Pan: The pans where you place the items to be weighed are often made of stainless steel, which is easy to clean and resistant to corrosion.

Remember to follow any specific usage instructions provided by the manufacturer to ensure accurate and reliable results.