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 Luminous Transmittance Meter

product model TLV-304-LC
TLV-304-LC brochure
Image TLV-304-LC PDF

Movie clips

TLV-304 Movie 1
figure TLV-304-LC Explanation

The TLV-304-LC is a compact transmittance meter with a correction filter
which approximates to the luminosity curve. This unit quickly
measures the transmittance with a value close to sensitivity of human
eyes and allows easy measurement by placing a sample after one-touch
calibration. It is suitable for a quick inspection process to conduct large
volume of measurements.

figure TLV-304-LC Optical Configuration
figure Temporal Luminosity Characteristics
Photo Sensitivity
  • Transparent conductive film glass
  • Film
  • Glass blank
  • Resin material
  • Filter glass
  • Eyeglass lens



Photo sensitivity

Approximation of photopic spectral luminous efficiency

Light source

White LED


4 digit digital display (xxx.x) Unit: %

Measurement reproducibility

Within ± 0.5%

Measurement time


Distance between detector and light source

Approximately 50mm

Beam diameter

6mm dia.

Sample size

Min. 15mm dia.

Criteria for judgement function

Green indicator (ON, OFF or Blink)

Input voltage

AC100 - 240V 50/60Hz (Input range: AC85 - 264V)

Apparent power

Less than 7VA (AC100V/50Hz)

Remote control

RS485 *The cable is optional.

Recommended environment

Temperature 10 - 35 deg C


Humidity less than 70% *Avoid condensation


150(W) x 204(D) x 213(H)mm