If you’re working with high-temperature dental or lab furnaces, chances are you’ve encountered a Molybdenum Disilicide (MOSI-2) heating element, . These components are incredibly efficient but also highly fragile.

Handling them improperly can lead to cracks or breaks, resulting in unexpected costs and furnace downtime. That’s why knowing how to measure your MOSI-2 element correctly is essential for ordering the right replacement—and avoiding unnecessary accidents.

In this guide, we’ll walk you through the three key measurements you need to take to correctly measure your heating elements . Let’s get started.

⚠️ Handle With Care!

Before we begin, remember:
MOSI-2 elements are ceramic-based and extremely brittle. Avoid twisting, bending, or dropping them. Always handle as you would fine glassware.

we’ve engineered custom packaging for each type of MOSI-2 heating element to ensure maximum protection during shipping. You can rest assured that your element will arrive safely and securely—so you can focus on your work without worrying about transport damage.

📏 Tools You Will Need

• Digital Calipers – Highly recommended for precision

• Metric Tape Measure – Acceptable if calipers aren’t available

• Gloves – To avoid contamination and improve grip

💡 All measurements must be in millimeters.

📐 The 3 Key Measurements Needed

To use the online pricing calculator, you’ll need these three dimensions:

1. Le (Heated Zone Length)

2. Lu (Cold Terminal Length)

3. A (Center-to-Center Distance Between Terminals)

1. Measuring Le – Heated(hot) Zone Length

What it is:
The length of the active part of the element that generates heat.

How to measure:
Start from the outer base of the hairpin bend and follow the curve upward until you see the element narrow down and change color or texture. This transition point marks the end of the heated zone.

🎥 Visual tip: The heated zone often has a smoother, darker appearance compared to the colder, grayer terminal.

Example:
If you measure ~80.2 mm, then the 80mm is the length of the hot zone.

2. Measuring Lu – Terminal(cold zone) Length

What it is:
The unheated section of the element from the transition point to the tip of the terminal.

How to measure:
Place your tape measure or caliper at the same transition point where the heated zone ends. Measure straight up to the very end of the terminal.

Example:
A measurement of ~120 mm.

Note: The website may round values to standard sizes—so measure as accurately as possible.

3. Measuring A – Terminal Spacing

What it is:
The distance between the centers of the two terminal ends.

How to measure:
Use digital calipers for the most accurate result. Measure from the center of one terminal tip to the center of the other.

Example:
the calipers show 25 mm, which is the most common distance for heating elements used in dental furnaces.

📩 Need More Help?

If you’re unsure about your measurements or run into any issues, don’t hesitate to reach out! Our team at Walla BC is here to help.

Contact us:
✉️ info@wallabconline.com

More information please visit：

https://wallabconline.com/collections/mosi2-heating-elements