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厚度测试仪
THT · Tablet Testing Equipment · 5 models
By Lab Manufacturers China Technical TeamLast reviewed Standards: USP <1217>, Ph. Eur. 2.9.8, ISO 13385-1
Tablet thickness testers measure the thickness and often the diameter of tablets and other solid dosage forms using a contact gauge or optical sensor. Pharmaceutical QC laboratories and production teams use them to monitor compression consistency and to check tablets against dimensional specifications.
5 models of Thickness Testers
The 5 models below are current configurations; specifications are confirmed on quotation.
数字式片剂厚度规
A digital tablet thickness gauge is a handheld or benchtop contact instrument with a digital readout. It is the economical option for production floors and small laboratories that measure thickness manually with 0.01 mm resolution.
电动片剂厚度测试仪
A motorized tablet thickness tester lowers the measuring probe by motor at a controlled force and speed, removing operator influence. It suits laboratories that need repeatable thickness data supported by automatic statistical reports.
非接触式激光片剂厚度测试仪
A non-contact laser tablet thickness tester measures thickness and diameter by laser or light-curtain sensing without touching the tablet. It is used for soft, coated, sticky or fragile dosage forms that contact gauges would deform.
片剂厚度、直径及重量多参数测试仪
A multi-parameter tablet tester measures thickness, diameter and weight of each tablet in one cycle, with an integrated balance. It is used where dimensional data must be collected alongside weight for statistical batch control.
带振动进料器的自动片剂厚度测试仪
An automatic tablet thickness tester with vibratory feeder presents tablets one at a time to a measuring station and records thickness of a whole sample without manual handling. It is used where large sample sizes are measured every batch.
| Model | Measuring range | Resolution | Accuracy | Measuring force | Repeatability |
|---|---|---|---|---|---|
| Digital Tablet Thickness GaugeTHT-0001 | 0–25 mm | 0.01 mm | ± 0.02 mm | approx. 1 N | ≤ 0.01 mm |
| Motorized Tablet Thickness TesterTHT-0002 | 0–25 mm | 0.001–0.01 mm | ± 0.01 mm | 1–20 N adjustable | ≤ 0.005 mm |
| Non-Contact Laser Tablet Thickness TesterTHT-0003 | — | 0.001 mm | ± 0.005 mm | — | — |
| Multi-Parameter Tablet Tester for Thickness, Diameter and WeightTHT-0004 | — | — | — | — | — |
| Automatic Tablet Thickness Tester with Vibratory FeederTHT-0005 | — | 0.001 mm | ± 0.01 mm | — | — |
Indicative values for this product class. Final specifications are confirmed on the quotation and in the calibration documents supplied with the instrument.
Thickness is measured either by contact or without contact. A contact tester places the tablet between a fixed anvil and a spring-loaded or motor-driven measuring probe, and a digital encoder or linear scale converts probe displacement into a thickness value, typically with 0.01 mm resolution. Non-contact testers use a laser or light-curtain sensor that measures the shadow or reflected light of the tablet, so soft or fragile units are not deformed. Diameter can be measured by a second probe or sensor placed perpendicular to the first. Key components are the measuring head, a controlled measuring force, the anvil, a display or software, and often an automatic feeding or alignment system. Results are logged as individual values with mean and standard deviation for batch statistics and trend charts.
Start from the required measuring range and resolution, typically 0.01 mm for tablets. Choose contact measurement for robust tablets with a simple, low-cost workflow, and non-contact measurement for soft, sticky or coated units where probe force could deform the sample. Decide whether diameter or length is needed, since multi-parameter units add sensors. For high sample counts, automatic feeding reduces operator time. Confirm that the instrument handles odd shapes such as oblong or capsule-shaped tablets, because alignment matters. Check measuring force adjustment, because excessive force compresses soft tablets. For regulated labs, look for data export, statistical reports and traceable calibration with gauge blocks. A combined tester with hardness and weight measurement may save space when multiple properties are tested routinely.
Thickness Testers are specified in tablet compression monitoring, dimensional QC of finished tablets, formulation and tooling development, capsule and softgel dimension checks and nutraceutical tablet manufacturing.
Work with Thickness Testers is commonly governed by USP <1217>, Ph. Eur. 2.9.8, ISO 13385-1 and IEC 61010-1. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
Place the tester on a stable bench away from drafts and vibration, and allow it to equilibrate to room temperature. Verify the zero and span with certified gauge blocks at installation and at defined intervals, and check measuring force with a force gauge where applicable. Keep the anvil and probe clean, since tablet dust and coating residue cause drift. Record the measurement force and orientation of tablets, because different orientations produce different readings for non-round tablets. For optical sensors, keep lenses free of dust and check alignment. Under GMP, qualify the instrument, control software access and keep calibration records traceable to national standards.
A tablet thickness tester measures the thickness of tablets, and often their diameter, with a contact probe or optical sensor. It supports compression control and dimensional checks, because thickness varies with fill weight, compression force and tooling condition.
Thickness affects hardness, disintegration, weight uniformity and packaging fit. A drift in thickness often signals a change in fill weight or compression force, so it is a simple early-warning parameter in production.
Contact gauges are simple and accurate for robust tablets, while non-contact optical methods avoid deformation of soft or coated units. The better choice depends on tablet hardness, shape and throughput needs.
A resolution of 0.01 mm is typical for tablets, with accuracy around ±0.02 mm. Finer resolution is rarely useful, because tablet surface roughness and dust introduce comparable variation.
