351C Handheld Labodorf Transmission Densitometer Japan Origin Easy Operation Film Density Testing Device 0-6.5D ISO/ANSI-Labcan Scientific

Product Description

Labodorf 351C Transmission Densitometer is a high-precision transmission optical density testing instrument. Based on OD formula OD=lg(Incident Light/Transmitted Light), it accurately characterizes light transmittance and shading performance of all opaque materials. Equipped with long-life 5000K LED light source and high-sensitivity photodiode detector, it reaches a maximum OD measuring range of 6.5D, covering full inspection demands of film, photoresist and optical film industries.

Compact and lightweight (only 1kg), it supports 4 interchangeable measuring apertures: 0.5/1/2/3mm, and can test central area of A4-sized samples up to 260mm width. Built-in USB port works with optional DensPC software for data export, PC storage and batch analysis. Excellent repeatability, accuracy and zero drift ≤0.01D, data compatible with most mainstream densitometers. It complies with ISO 5/2, ANSI PH2.19 and national standards GB/T 11500, GB/T 11501 for photographic density measurement.

It serves as standard QC equipment for LCD black matrix & bezel shading test, PCB silver halide film, screen printing ink, coated aluminum plastic packaging film, PV directional reflective film, widely adopted by optical labs, printing factories and display electronics manufacturers.

English Features
Ultra-wide measuring range, maximum OD up to 6.5D
Long-life 5000K constant temperature LED light source
Measurement data fully compatible with all mainstream densitometer brands
Wide sample compatibility, supports central area test of A4-size specimens
USB communication port, export & save test data on PC via DensPC software
4 switchable measuring apertures: 0.5/1/2/3mm
High precision & low drift, zero adjustment stability ≤0.01D
Compliant with ISO, ANSI and Chinese national density test standards
Lightweight all-in-one design, net weight only 1kg, desktop & portable use

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Product Parameters

Item	Specs
Model	Model 351C Labodorf
Measured Parameter	Optical Density (OD)
Measuring Range	0–6.5 Optical Density
Repeatability (3mm aperture)	≤0.01D within 0–4.0D (3mm aperture)
Accuracy (3mm aperture)	≤0.02D within 0–4.0D (3mm aperture)
Zero Stability	≤0.01D
Measuring Aperture	0.5mm / 1mm / 2mm / 3mm
Max Sample Size	260mm × 2mm
Light Source	LED, color temperature 5000K
Detector	Photodiode
Standards	ISO 5/2, ANSI PH2.19, GB/T 11500, GB/T 11501
Interface	USB, optional DensPC analysis software
Power Supply	DC 12V
Power	3VA
Dimension	200(L)×100(W)×100(H) mm
Net Weight	Approx. 1kg
Operating Condition	Temp:17℃–27℃, Humidity:0–60%RH

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Product Feature

Equipped with an ultra-wide measurement range, the maximum measurable optical density reaches 6.5D, covering testing requirements for high-shading materials in multiple industries.
Adopts a long-life LED light source with a constant color temperature of 5000K, delivering stable light output to guarantee consistent and repeatable test results for long-term continuous measurement.
Features excellent data compatibility, and the test values can match data output from most mainstream transmission densitometer brands on the market for convenient cross-equipment data comparison.
Supports large-size specimen testing, capable of measuring the central area of A4-sized samples to adapt to large-format substrates, films and sheet materials.
Built with a standard USB communication interface; paired with optional DensPC supporting software, it enables one-click data export, PC-side data storage and batch data analysis.
Provides four interchangeable measuring apertures including 0.5mm, 1mm, 2mm and 3mm, allowing users to switch calibers flexibly according to the test area of tiny patterns, narrow frames and large uniform coating layers.
Delivers high measurement precision and low zero drift performance, with zero adjustment stability controlled within 0.01D, effectively avoiding data deviation caused by long-time operation.
Fully complies with international standards ISO 5/2, ANSI PH2.19 and Chinese national standards GB/T 11500, GB/T 11501, meeting formal laboratory and factory quality inspection certification requirements.
Compact and lightweight integrated structure with a net weight of only 1kg, supporting both desktop fixed installation and portable mobile testing on production lines.

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Labodorf 351C Transmission Densitometer, 0-6.5D OD range for LCD black matrix, PCB film, printing ink & PV film. Multi measuring apertures, USB data export, compliant with ISO & GB density standards, sample testing available.