Product Overview

The KR‑407 contact‑type thickness measuring instrument is dedicated lab equipment for gauging the physical thickness of paper, paperboard and other flat sheet‑form materials. Following GB/T 451.3 test specification, it applies standard static contact pressure onto specimens and captures vertical distance between two parallel measuring planes as final thickness readings.

This benchtop mechanical‑digital hybrid tester delivers stable and repeatable thickness data, which is essential for evaluating raw‑material consistency, production‑batch uniformity and finished‑product quality. It is widely deployed within pulp‑paper mills, printing‑packaging factories, material‑R&D centres and accredited third‑party quality‑supervision laboratories for incoming‑material inspection and routine physical‑property QC.

Core Product Competitive Advantages

1. Standard‑Defined Contact Pressure & Contact‑Area Assembly Two sets of standard‑compliant pressure‑weight configurations are built‑in: 100 ± 10 kPa for ordinary paper and 20 ± 5 kPa for thick paperboard. Matched contact‑plane sizes (200 ± 5 mm² for paper, 1000 ± 5 mm² for board) strictly follow GB/T 451.3 requirements, eliminating deviation caused by non‑standard measuring force.
2. High‑Precision Digital Read‑Out Indicator High‑resolution digital dial gauge provides 0.01 mm minimal readout increment across full 0‑10 mm measuring stroke. Clear digital display avoids visual‑parallax errors common with analogue pointers, helping operators capture accurate thickness values rapidly during high‑volume batch‑testing.
3. Precision‑Machined Parallel Measuring Planes Upper and lower measuring platens are precision‑ground to maintain excellent parallelism. Heavy‑cast stable base absorbs minor desktop vibration, preventing rocking during specimen loading and ensuring consistent contact condition for every test cycle.
4. Ergonomic Manual‑Lever Operation Design Simple hand‑lever mechanism lifts upper measuring platen effortlessly. Operators place or replace specimens with one‑hand operation. No complex parameter configuration is needed; new lab staff can master the whole measuring workflow with minimal training.
5. Robust Long‑Service‑Life Mechanical Framework Solid cast‑iron main body and wear‑resistant metal measuring surfaces resist deformation under long‑term continuous‑use. Key moving components adopt anti‑wear treatment, lowering frequency of calibration and part‑replacement for daily laboratory workload.

Complete Technical Parameter Table

Compliance Standard: GB/T 451.3 (Determination of thickness of paper and paperboard)

Standard Complete Test Operating Workflow

1. Pre‑Test Preparation Place instrument on rigid, horizontal vibration‑free lab bench. Clean upper‑and‑lower measuring platens to remove paper dust and debris. Power‑on digital indicator and execute zero‑point calibration with platens in direct contact. Select suitable pressure weight and contact‑plane according to whether samples are ordinary paper or thick paperboard.
2. Specimen Placement Lay conditioned paper / paperboard specimen flat on the lower measuring platen. Position measuring point away from specimen edges as per standard requirements, ensure sample lies completely flat without creases, curls or wrinkles.
3. Perform Thickness Measurement Release hand‑lever slowly to lower upper measuring platen fully onto specimen surface. Wait for reading to stabilise, record thickness value shown on digital display.
4. Multi‑Point Batch Sampling Lift lever, shift specimen to new measuring position. Repeat measurement for multiple sampling points on same sheet. Calculate average thickness value for the specimen batch for quality‑evaluation purposes.
5. Post‑Test Tidying After completing all test groups, lift measuring platen, remove tested samples. Keep measuring platens clean. Shut‑down digital‑gauge power. Conduct periodic parallelism‑and‑zero‑point calibration to sustain measuring‑precision.

Wide Industrial Application Scenarios

Pulp‑Paper Manufacturing Plants

Thickness QC for cultural printing‑paper, packaging base‑paper and multi‑layer paperboard; monitor thickness uniformity across production batches.

Printing & Packaging Enterprises

Raw‑paper incoming‑batch inspection; analyse thickness fluctuation impact on printing, die‑cutting and folding processes.

Paper‑Material R&D Departments

Thickness‑comparison testing for new pulp‑formula and coating‑process paper‑board samples, supporting product‑optimisation work.

University Paper‑Science Laboratories

Basic teaching‑experiment hardware for paper‑packaging‑majors for physical‑property research of fibre‑based sheet‑materials.

Third‑Party Accredited‑Testing‑Organizations

Carry‑out GB/T 451.3‑compliant thickness‑determination and issue formal inspection‑documents for paper‑material certification‑audits.

Standard Factory‑Full‑Delivery Kit

1. KR‑407 paper‑paperboard thickness‑tester main‑unit (cast‑iron frame, hand‑lever lifting mechanism, digital dial indicator)
2. Standard pressure‑weight sets for paper & paperboard testing
3. Matching contact‑plane assemblies for paper and board
4. Multilingual printed‑operation‑manual complying with GB/T 451.3
5. Factory‑issued performance‑inspection‑certificate

Global Distributor & After‑Sales‑Support

We provide remote‑one‑on‑one operational guidance covering zero‑point calibration, pressure‑weight selection and platen‑cleaning routines. Spare‑parts stock includes digital‑indicator module and wearing mechanical components. Bulk‑order customers can request custom‑spec configuration. Regional‑exclusive‑agent privileges contain priority‑production‑scheduling, OEM private‑branding‑services and complete‑set high‑definition product‑marketing‑image‑resources.

Product‑Banner‑Marketing‑Slogan

KR‑407 Paper‑Paperboard Thickness Tester | GB/T451.3‑Compliant Contact‑Type Instrument For Sheet‑Material Thickness‑Determination

Core‑Feature‑Labels‑For‑Product‑Images

GB/T451.3‑Standard‑Compliant | Dual‑Mode Pressure‑Weight Setup | 0‑10mm Measuring‑Range 0.01mm Resolution | Precision‑Parallel Measuring‑Planes | Digital‑Read‑Out Dial‑Gauge | Hand‑Lever Simple‑Operation | Heavy‑Stable Cast‑Iron Base | Benchtop Compact‑Layout

Safety‑Operation‑Reminder

Avoid heavy impact against precision measuring platens. Keep platen surfaces free of grit and paper scraps. Do not apply extra manual force onto hand‑lever during measurement. Perform regular zero‑point and parallelism calibration.