LS251D Portable Digital Leeb Hardness Tester with 360° Measurement



LS251D Leeb Hardness Tester is designed to measure the hardness of various metal materials with precision. It features a D-type impact device and advanced digital probe technology, ensuring high accuracy. The built-in orientation sensor allows for 360° measurements, making it versatile for different testing positions. The tester includes multiple hardness scales, easily convertible between HL, HV, HB, HS, HRA, HRB, HRC, and strength (σb), catering to a range of testing needs. With a measurement accuracy of ±6HL, the LS251D guarantees reliable results and meets the standards of national authoritative metrology institutes.


1. D-type impact device for measuring the hardness of a wide range of metal materials.

2. Adopt advanced digital probe technology to provide excellent accuracy.

3. It can measure at all angles up to 360°, due to the built-in orientation sensor in the probe.

4. Provide various hardness scales, which can switch between HL, HV, HB, HS, HRA, HRB, HRC and strength (σb).

5. Accuracy is up to ±6HL, which can ensure pass authoritative metrology institute testing.

6. With QC function, can set the upper and lower limits to judge whether the material is qualified.

7. It can automatically count the maximum, minimum, and average values of the last 9 measured values in statistics mode.

8. Users can calibrate the standard parts to eliminate the error.



1. Hardness Scales: HL, HV, HB, HS, HRA, HRB, HRC

2. Measurement Range: HLD(170-960)/HV(83-976)/HB(30-651)/HRC(17.6-68.5)/HS(26.4-99.5)/HRB(13.5-100)/HRA(60-85.8)

3. Resolution: 1HL

4. Accuracy: ±12 HL, ±6 HL typical

5. Repeatability: 6HL

6. Display: 240 * 16 dot matrix LCD

7. Power supply: 2 AA alkaline dry batteries

8. Host Size: 142*72*28 mm

9. Probe Size: 148*31*25 mm

10. Weight: 247g

11. Working Temperature Range: -10~50℃,0~85%RH(no condensation)

12. Storage Temperature Range: -10~60℃,0~85%RH(no condensation)


Packing List

1. Leeb Hardness Tester*1

2. Standard Leeb Hardness Block*1

3. Nylon Brush*1

4. Small Support Ring*1

5. User Manual*1

6. Certificate / Warranty card*1

Free Shipping

Under normal circumstances we offer free shipping on all orders, you will see the free shipping option in your cart at checkout. There is no choice of carrier for free shipping, but typically we will ship your order will likely ship using either USPS or FedEx. Full Shipping Policy

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). Full Returns Policy

When Will My Order Ship?

For Standard Shipping, we aim to pack and ship out your order within 3 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing.
We ship five days a week, Monday through Friday. Sometimes our mail pickup comes in early afternoon, so tracking for orders shipped later that day may not update until the following business day.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.

Can I Change The Shipping Address On My Order?

Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.
If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.

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LS251D Portable Digital Leeb Hardness Tester with 360° Measurement
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