Mahr MarSurf Pocket Surf IV Roughness Tester

Pocket-format tactile roughness instrument (art. 2191800) with cast-aluminum housing, 10 µm skidded piezo probe, and selectable Ra, Ry, Rmax, and Rz — usable horizontal, vertical, or upside down.

Key advantages

Four parameters — Ra, Ry, Rmax, Rz read after each traverse; µm or µinch.
Shop-ready — rugged cast-aluminum body; four locking probe positions (axial / 90° / 180° / 270°).
Adjustable traverse — 1× / 3× / 5× the 0.8 mm (0.030") cutoff wavelength.
MarConnect data — RS-232C and USB cables for data recording systems; 9 V battery.

Typical applications

Portable roughness checks on the shop floor, in production, or in the lab.
ID/OD and hard-to-reach surfaces via rotatable probe positions.
Incoming inspection and process monitoring where a full roughness station is overkill.

Selection guide

Art. no. — 2191800 MarSurf Pocket Surf IV.
Measuring range — Ra to 6.35 µm / 250 µin; Ry/Rmax/Rz to 25.3 µm / 999 µin.
Probe — Piezoelectric skid probe; stylus 10 µm / 0.0004"; force 15 mN.
Resolution — Profile 0.01 µm / 1 µin.
Size — 140 × 76 × 6.35 mm class; positioning speed to 1 mm/s.
Accessories — RS-232 cable 4346020; USB cable 4346023.

Common mistakes

Expecting full ISO parameter sets beyond Ra/Ry/Rmax/Rz without a larger MarSurf station.
Ignoring probe orientation for ID/OD — use the locking angle positions.
Skipping data cables when SPC logging is required.
Test & measurement

When to RFQ / what to tell us

Confirm Pocket Surf IV (2191800) vs other MarSurf mobiles.
USB vs RS-232 cable needs; quantity.
Ship-to; any calibration certificate preference.

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Specs

Spec	Value
SKU	36036
Brand	Mahr
Model	MarSurf Pocket Surf IV (art. 2191800)
Product type	mobile roughness measuring instrument
Measuring range	Ra: 6.35 µm / 250 µin; Ry/Rmax/Rz: 25.3 µm / 999 µin
Parameters	Ra, Ry, Rmax, Rz
Stylus	10 µm / 0.0004"; 15 mN
Supply voltage	9 V battery
Notes	Specs from Mahr MarSurf Pocket Surf IV product page (art. 2191800).

Documents

Mahr MarSurf Pocket Surf IV product page

FAQ

Q: Can it measure upside down? A: Yes — Mahr states horizontal, vertical, and upside-down use with four locking probe positions.

Q: What should I send for a quote? A: Quantity, cable needs, ship-to. Compatible with systems using Mahr Pocket Surf IV if you need a drop-in check — we do not claim authorized-dealer status.