Question 1

What is your minimum order quantity (MOQ)? Can I order samples?

Accepted Answer

There is no minimum order quantity for our standard products. You can order a single unit for evaluation or purchase in bulk.

Question 2

Are you a manufacturer or a trading company?

Accepted Answer

We are a manufacturer specializing in the research, development, and production of measuring instruments since 2008. We offer a wide range of instruments for industrial testing applications.

Question 3

How do you ensure product quality? Can you provide certificates?

Accepted Answer

Our instruments undergo quality inspections before shipment. Inspection reports and third-party calibration or testing certificates may be available upon request. Please contact us to confirm availability and any additional fees.

Question 4

What is your warranty and after-sales service policy?

Accepted Answer

Our instruments come with a 12-month warranty. We provide technical support and offer paid repair services after the warranty period.

Question 5

What are your payment methods, delivery terms, and lead times?

Accepted Answer

We accept payments in USD and CNY via T/T or Western Union. Our standard delivery terms include EXW and DAP. Lead times depend on product availability and order quantity. Please contact us for details.

Question 6

Do you offer OEM or customized products?

Accepted Answer

Yes, we offer OEM and customization services. Please contact us with your specific requirements to discuss available options.

Question 7

Are import duties and taxes included in the price?

Accepted Answer

Import duties and taxes depend on the destination country's regulations and are generally not included in the product price. We can provide the HS code for reference. Please consult your local customs authority for applicable charges.

Question 8

What is the difference between Leeb, Webster and ultrasonic contact impedance?

Accepted Answer

Leeb measures the rebound of an impact body and suits medium and large metal parts. Webster uses a spring loaded indenter and is popular for aluminium and copper profiles and extrusions. Ultrasonic contact impedance measures the frequency shift of a vibrating rod pressed on the surface, which gives a very small indent and works on thin parts.

Question 9

What is the LS252D Leeb hardness tester?

Accepted Answer

The LS252D is a compact integrated Leeb hardness tester with a D type impact device, measuring the hardness of common metal parts. It uses dual coil technology for repeatability, a direction sensor that compensates for the impact angle, and an OLED display in a body of only 68 g.

Question 10

Which impact device should I choose, D, DC, DL or C?

Accepted Answer

The D device is the universal choice for ordinary metal parts with sufficient mass and thickness. DC has a shorter tube and is used inside holes and cylinders. DL has a very slender tube for grooves, gear teeth and the bottom of bores. C uses lower impact energy for surface hardened layers, thin wall parts and small components that would be deformed by D.

Question 11

Where is the LS252D commonly used?

Accepted Answer

It is used for field inspection of shafts, flanges, brackets, weld areas and machined parts, where a portable instrument of pocket size is more practical than a bench hardness tester. It is the model most often carried in a maintenance tool bag.

Question 12

How do I verify the instrument is working correctly?

Accepted Answer

Impact the supplied standard hardness block five times and compare the average with the value engraved on the block. The reading should fall within the stated tolerance of about 12 HL, typically 6 HL. A consistent offset means the block or the probe has drifted; a scattered result usually means poor surface preparation or a loose coupling.

Question 13

How does the LS252D differ from the LS252DC?

Accepted Answer

Both are integrated D family instruments. The LS252D uses the standard D device with a 148 mm body, the LS252DC uses a shorter DC device of 88 mm for holes, cylinders and internal surfaces. The hardness scales and accuracy are the same.

Question 14

How do I measure a flange face with the LS252D?

Accepted Answer

Support the flange so that it cannot vibrate, place the probe perpendicular to the surface with the support ring flat, and trigger. Take several impacts around the circumference, because the hardness of a forged flange can vary between the rim and the bore.

Question 15

Why does my Leeb value differ from the laboratory Rockwell result?

Accepted Answer

The two methods measure different things. Leeb uses a small impact and reflects the hardness of a thin surface layer, while Rockwell uses a much larger load and reflects a deeper volume. Surface hardening, decarburization, residual stress and the conversion table all cause differences. Use Leeb for sorting and field inspection, and confirm critical parts with a laboratory method.

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