C640 Thickness Tester

C640 Thickness Tester is a high precision mechanical contact method thickness tester, which can be used for thickness measurement of films, sheeting, paper, corrugated paperboard, textiles, non-woven fabrics, and solid insulation materials, etc.

  • Films and Sheeting
    Thickness measurement of various plastic films, sheeting, and diaphragms, etc.
  • Paper
    Thickness measurement of various paper, paper board and composite paper board, etc.
  • Metal Pieces & Silicon Wafers
    Thickness measurement of silicon wafers, foils and various metal pieces, etc.
  • Corrugated Paperboard
    Thickness measurement of corrugated paperboard
  • Textiles
    Thickness measurement of textiles including woven fabrics, knitted fabrics, coated fabrics
  • Non-woven Fabrics
    Thickness measurement of non-woven fabrics e.g. baby diapers, sanitary napkins and medical masks, etc.
  • Other Materials
    Thickness measurement of solid insulation materials, adhesive tapes, earthwork synthetic materials and rubbers, etc.


With innovative research and development, Labthink C640 Thickness Tester uses high precision displacement sensor, supported by scientific structure and professional control technology, which makes C640 greatly improved in stability, repeatabilityNote1 and accuracy.

  • The instrument conforms to standards for mechanical contact method. The pressure foot can be lifted and lowered automatically, which can minimize the errors caused by human operation.
  • Contacting time and test speed can be set as required. Customization is available for multiple contact areas and pressures, which can meet the requirements for various test conditions.
  • Manual and automatic test modes can be selected by the users
  • Calibration of multiple points can improve the linearity of the whole test range, which ensures the accuracy of measured results.
  • Standard gauge block is available for fast calibration

High Efficiency

The instrument is featured with high efficiency and automatic design of structure, which minimize the human operation in measuring process. Intelligent controlling and data processing functions make it easy and reliable for test operation and data processing.

  • Parameter program function enables the user to save all test parameters in a file so that those parameters can be applied directly for the same tests next time, which can help the user save time and minimize the error when inputting parameters manually.
  • Test results include maximum value, minimum value, average value and standard variation, which can be displayed to the user directly.
  • Result comparison function can help the user in evaluation of results.
  • Auto sampling function (optional), feeding space, feeding speed, measure points can be set as required, which ensures the accuracy of multiple successive points measurement.


The instrument is embedded with Labthink’s latest operating software, which is featured with user-friendly interface, intelligent data processing, strict user management and secure data storage. It also supports Labthink exclusive DataShieldTM (Optional) which provides the users with safe and reliable management of test data and test reports.

  • Test data can be displayed in various forms including curves and data list
  • Test data will be saved and encrypted in a unique way so that all the test information will be saved securely and reliably and protected from being tampered
  • Various forms of test data can be searched, exported and printed out

ISO 4593, ISO 534, ASTM D6988, ASTM F2251, GB/T 6672, GB/T 451.3, TAPPI T411, BS 2782-6, DIN 53370, ISO 3034, ISO 9073-2, ISO 12625-3, ISO 5084, ASTM D374, ASTM D1777, ASTM D3652, GB/T 6547, GB/T 24218.2, FEFCO No 3, EN 1942, JIS K6250, JIS K6783, JIS Z1702

Test Parameters

Parameter Model C640M C640H
Test Range (Standard) mm 0 ∼ 2 0 ∼ 2
Resolution μm 0.1 0.1
RepeatabilityNote3 μm 0.8 0.4
Test Range (Optional 1) mm 0 ∼ 6 0 ∼ 6
Test Range (Optional 2) mm 0 ∼ 12 0 ∼ 12
Feeding Space mm 0 ∼ 1000 (Adjustable)
Feeding Speed mm/s 1.5 ∼ 80 (Adjustable)
Additional Functions Auto Sampler Optional Optional
DataShieldTM Note2
Optional Optional

Technical Specifications

Measuring Method Mechanical Contact Method
Test Pressure & Contact AreaNote3 Film: 17.5±1 KPa, 50 mm2
Paper: 100±1 KPa (Standard) / 50±1kPa (Optional), 200mm2
Instrument Dimension 370 mm (L) x 350 mm (W) x 410 mm (H)
Net Weight 26kg

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