Insize

The Insize collection is the most comprehensive single-brand lineup on the site, spanning virtually every category of dimensional metrology and material testing. Product families include outside micrometer sets, high-precision non-rotating spindle micrometers, wide-range three-point internal micrometers, tubular inside micrometers, laser scan micrometers, bore gauges (standard, internal groove, and rotary), digital height gauges, depth gauges, digital snap gauges, caliper and height gauge checkers, ultrasonic thickness gauges, CNC vision measuring systems, hardness testers (Rockwell, Brinell, Vickers, Leeb/portable), and Vickers hardness measuring systems. Founded in 1995, Insize designs every product to meet strict international standards and serves machine shops, quality control labs, inspection rooms, and precision manufacturing environments worldwide.

Insize offers a broad micrometer family covering outside, inside, three-point internal, tubular inside, and laser scan models. The 3203-1212A Outside Micrometer Set covers the full 0–12" range with 0.0001" graduation, carbide measuring faces, ratchet stop, and setting standards making it a complete bench reference solution in one case. The 3661 Series High Precision Non-Rotating Spindle Electronic Micrometers are the high-performance standouts: the non-rotating spindle design prevents contact point torque from distorting the measurement on cylindrical or delicate parts, which is the primary source of repeatability error in conventional spindle micrometers. Resolution is selectable between 0.0005mm, 0.00005", and 0.00002" (0.5µm), repeatability is 0.5µm, and measuring face flatness and parallelism are held to 0.3µm and 0.5µm respectively, specifications that place these instruments firmly in the precision lab and high-accuracy production inspection category.

The Insize bore gauge lineup is one of the most extensive in the collection, spanning standard two-point bore gauges (2435 Series) covering diameters from 0.18" up to 20.1" with measuring depths from 10" to 120", plus three specialty variants for challenging geometries. The 2433 Series Internal Groove Bore Gauge measures the diameter of internal grooves where a standard gauge cannot reach (groove width greater than 3mm, anvil required). The 2921 Rotary Bore Gauge uses a rotary anvil to measure bores with small or restricted openings that prevent conventional gauge entry. All bore gauges in the 2435 Series accept 0.001", 0.0001", or 0.00005" graduation dial indicators and feature carbide contact points and anvils for maximum wear life and accuracy.

The Insize 1158-100 is a 0–4" large range digital height gauge built for demanding metrology applications. Its defining specification is a primary resolution of 0.000005" (0.1µm) switchable to 0.00005" (1µm) combined with an accuracy of 118µin and a high-speed response of 200"/s. The granite base provides a stable, flat reference surface with 118µin flatness. The high-brightness LED display ensures clear readout in any lighting condition. This level of resolution places the 1158-100 in the same performance tier as laboratory height gauges used for calibration, surface plate metrology, and verification of precision ground or lapped components where standard 0.0005" resolution instruments are not sufficient.

The Insize 3350-25 is a high-precision digital snap gauge covering 0–1" (0–25mm) with three selectable resolutions: 0.00001" (0.0002mm), 0.00005" (0.001mm), and 0.0005" (0.01mm). Unlike a mechanical snap gauge that simply passes or rejects a part against preset anvil limits, the 3350-25 provides a live digital reading of the measured diameter making it equally useful for variable data collection and SPC as it is for go/no-go inspection. The absolute encoder retains measurement data after power-off, one turn of the sleeve produces 0.2" of spindle feed for fast part engagement, and the rechargeable battery supports 24 hours of continuous use. Buttons support data output, tolerance settings, data preset, max/min/TIR tracking, and inch/metric conversion which are all the functions needed for structured production inspection documentation.

The Insize ISU-300D is a through-coating ultrasonic thickness gauge that measures material thickness without requiring access to both sides of the part and only one surface contact is needed. It operates in two modes: Echo-Echo (E-E) mode, which measures coating thickness (0–0.04") and substrate thickness (0.16–0.98") simultaneously, allowing thickness measurement without removing the coating; and Transmission-Echo (T-E) mode, which measures substrate thickness from 0.06" to 7.87" directly. Resolution is 0.001" for ranges under 10" and 0.01" beyond. This instrument is essential for inspecting pipe walls, pressure vessels, ship hulls, tanks, and any structure where destructive testing or two-sided access is impractical and for quality inspection of coated parts where the substrate dimension must be verified with the coating intact.

The Insize 6884-E40 is a precision reference standard specifically designed to verify the accuracy of calipers and height gauges at multiple points across their range, covering 0–40" with ±300µin accuracy. It is constructed from steel gauge blocks aligned on a rigid frame, providing a series of known reference steps against which the instrument under test is compared. In quality management systems operating under ISO 9001, IATF 16949, or AS9100, all measuring instruments used in production must be periodically verified against a traceable reference standard, the 6884-E40 provides that reference directly on the shop floor without sending each caliper or height gauge to an outside calibration lab for every periodic check. It is the practical tool that closes the calibration loop between formal laboratory re-certification events.

Insize CNC vision measuring systems, specfiically the ISD-V Series (220, 270, 370) with ZA, ZHN, HN, and CNCA stage and optics configurations are fully automated non-contact measuring machines that combine motorized X/Y/Z stages, motorized or manual zoom optics, and measurement software to inspect part geometry, GD&T features, and 2D profiles with X/Y/Z axis resolution down to 0.00002". These systems represent the high-complexity end of the Insize lineup and integrate directly with Insize's software ecosystem for CNC automated measurement routines, statistical reporting, and dimensional reporting. On-machine probe transmission models (the 9407 Series) extend measurement reach to features that vision optics cannot access. Together with the hand tool lineup, they allow a quality department to standardize on Insize instruments from bench gauges through fully automated optical inspection.

Insize hardness testers cover Rockwell (manual and automatic, including ISH-R150, ISH-RD200, ISH-MR150-U, ISH-MRD200-U, ISH-RSR700-U, ISHR-T100-U dolphin-nose model), combined Brinell/Rockwell/Vickers (ISH-BRV-U, HDT-BRV130-U), magnetic Rockwell and Brinell for large parts (ISHR-M111, ISHR-B141, ISHR-D121), portable Leeb testers (ISH-PHB, ISH-PHB-B, ISH-PHA, HDT-LP200B with Bluetooth printer), Barcol (ISHB-B300), and hydraulic Brinell including a chain-type model for cylinders and tubes (ISHB-H131, ISHB-C161). The Insize 9631-130 Vickers Hardness Measuring System adds USB-connected automated indentation measurement via CMOS camera, enabling labs to upgrade existing Vickers testers with digital image analysis. Where Phase2+ focuses heavily on benchtop Rockwell/Superficial Rockwell and UCI ultrasonic testing, Insize fills out the portable, magnetic, Barcol, and combination BRV categories, giving buyers a single source for virtually any hardness testing requirement.

All Insize orders ship free to the continental USA, backed by a best-price guarantee. A 30-day return policy and Affirm financing at checkout are available across the full Insize lineup. Government agencies, defense contractors, and institutional buyers can submit an RFQ through the dedicated Government RFQ page (DUNS: 13-715-2209, CAGE: 15F67). The Insize collection spans a wide range of instrument types and complexity levels from a 0–12" micrometer set to a fully automated CNC vision measuring system and selecting the right model, range, and configuration for a specific application is not always straightforward. Gustavo personally reviews every order and encourages buyers to call or text 617-398-7852 before purchasing, Monday through Friday, 8am–5pm EST, to ensure the right instrument for the job.