Mahr Pocket Surf IV Roughness Gage

Fits shop-floor and lab roughness checks where you need a pocket-sized Mahr skidded stylus gage for Ra, Ry, Rmax, or Rz with MarConnect data output.

Key advantages

Parameters — Selectable Ra, Rmax/Ry, Rz; read all parameters after the traverse
Traverse / cutoff — Measuring length 1×, 3×, or 5× the 0.8 mm / 0.030 in cutoff (ISO/JIS sampling length selection 1–5)
Probe positions — Four locking positions: axial or 90°, 180°, 270°; use horizontal, vertical, or upside down
Stylus / force — Art. 2191800: 10 µm / 0.0004 in stylus; measuring force 15 mN; piezoelectric skidded probe
Data / power — MarConnect RS-232C and USB; LCD in µm or µin; replaceable 9 V battery

Incoming and machine-side Ra/Rz checks on production parts.
Shop-floor or lab roughness where a compact skidded probe reaches ID/OD surfaces.
Simple data logging via MarConnect USB or RS-232 cable.

Art. / stylus tip — 2191800 = 10 µm tip with PMD-90101 specimen; flyer also lists 2191802 = 5 µm tip — state which tip you need
Parameters — Ra, Ry, Rmax, Rz only (not a 31-parameter PS 10 class instrument)
Cutoff — Fixed λc 0.8 mm / 0.030 in; choose 1, 3, or 5 sampling lengths
Cables — Optional MarConnect cables: RS-232C 4346020, USB 4346023

Ordering when you need Rpk/Rk/Rvk or PDF storage — Pocket Surf IV is Ra/Ry/Rmax/Rz class; see MarSurf PS 10 for broader parameter sets
Assuming a skidless probe — this is a tactile skidded piezoelectric probe
Leaving tip radius blank — 10 µm (2191800) vs 5 µm (2191802) changes the tip callout

Request a Quote · Get selection help

Spec	Value
SKU	103706
Brand	Mahr
Model	Pocket Surf IV Mobile Roughness Tester
Product type	Surface roughness tester
Art. no. (primary)	2191800 (EGH-1019 probe, 90°, 10 µm radius, PMD-90101 specimen)
Alt. art. (flyer)	2191802 (EGH-1026 probe, 90°, 5 µm radius, PMD-90101 specimen)
Measuring principle	Tactile stylus method; tactile skidded probe
Probe	Piezoelectric skid probe
Stylus	10 µm / 0.0004 in (art. 2191800)
Measuring force	15 mN
Parameters	Ra, Ry, Rmax, Rz
Measuring range	Ra to 6.35 µm / 250 µin; Ry, Rmax, Rz to 25.3 µm / 999 µin
Profile resolution	0.01 µm / 1 µin
Cutoff / sampling	λc 0.8 mm / 0.030 in; n = 1–5 sampling lengths (ISO/JIS)
Positioning speed	Up to 1 mm/s (X)
Data interface	RS-232C, USB (MarConnect)
Unit	Metric / inch
Power	9 V battery
Dimensions	140 × 76 × 6.35 mm
Housing	Cast aluminum

Q: Which parameters does Pocket Surf IV measure? A: Ra, Ry, Rmax, and Rz per Mahr OEM data for art. 2191800.

Q: 10 µm or 5 µm tip? A: Art. 2191800 ships with a 10 µm tip; the flyer also lists art. 2191802 with a 5 µm tip. State the tip on the RFQ.

Q: What should I send for a quote? A: Art. no./tip, cable need (USB/RS-232), quantity, ship-to.