SKU: 50910940447

GOYOJO GSR720 Surface Roughness Tester - 0.001μm

$296.55 $329.50
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Ships within 48 hours · Estimated delivery Aug 2 - Aug 7

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Description

GOYOJO GSR720 Surface Roughness Tester - 0.001μmHow It Works: When measuring surface roughness, the GOYOJO Surface Roughness Tester places the sensor on the surface and then uniformly slides it along the surface using the internal mechanism. The sensor captures surface roughness with its sharp built in probe. This roughness causes displacement in the probe, leading to a change in the induction quantity of the induction coil, thereby generating an analog signal proportional to the surface roughness

How It Works:

When measuring surface roughness, the GOYOJO Surface Roughness Tester places the sensor on the surface and then uniformly slides it along the surface using the internal mechanism. The sensor captures surface roughness with its sharp built-in probe. This roughness causes displacement in the probe, leading to a change in the induction quantity of the induction coil, thereby generating an analog signal proportional to the surface roughness at the output of the phase-sensitive rectifier.

Specifications:

Display Resolution 0.001μm
Measurement Range: Ra 0.025-12.5μm
Ra, Rq 0.005-16μm
Rz, Ry, Rt, Rp, Rv, Rmax, R3z 0.02-160μm
RS, RSm 1mm
Rr 0-100% (9%Rt)
Rsk 0-100%
Range Options ±20μm, ±40μm, ±80μm
Filters RC, PC-RC, GAUSS, D-P
Sampling Lengths 0.25mm, 0.8mm, 2.5mm
Maximum Drive Travel 17.5mm (0.7 inches)
Minimum Drive Travel 1.3mm (0.052 inches)
Indication Error ≤10%
Variability in Indication ≤6%

Specifications:

Display 128X640 LED Dot Matrix (Self-illuminating)
External Interface USB
Power Source Built-in rechargeable lithium-ion battery or external power adapter
Dimensions 140 x 52 x 48(5.51 x 2.05 x 1.89 inches)
Weight 440g(0.97 pounds)

Sensor Performance Specifications:

Detection Principle Inductive
Probe Contact Force 4mN (0.4gf)
Probe Angle 90°
Probe Tip Radius 5μm
Guide Longitudinal Radius 45mm
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50910940447

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Kathleen
Phoenix, US
★★★★★ 5
Excellent gift for your man.
Color: Leather Logo - Brown
Love this leather yet slim wallet for my husband…no more bulging pockets.
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Reviewed in the United States on January 19, 2026
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Pat in Olathe, KS
Boise, US
★★★★★ 5
So reasonably priced
Color: Rugged Leather - Black
Great feeling leather. There's a section for everything. Bonus is, it includes protection from thieves trying to access credit card info.
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Reviewed in the United States on December 26, 2025
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Amazon Customer
Phoenix, US
★★★★★ 4
Quality
Color: Leather Logo - Brown
Great wallet
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Reviewed in the United States on February 28, 2026
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Verified Purchase
Deb S.
Port Orchard, US
★★★★★ 5
Wallet
Color: Embossed Leather - Tan
Nice size. My husband likes the trifold wallets so this was a nice option for him. The wallet is soft and looks really nice. Just enough slots for cards. Very durable and had a great price also.
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Reviewed in the United States on December 26, 2025
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Abigail Menard
New York, US
★★★★★ 5
Great product!
Color: Embossed Leather - Tan
My husband loves his new wallet! Great quality leather! Plenty of little pockets!
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Reviewed in the United States on November 5, 2025

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