For Optical Density of Films, Foils, Paper etc.

TRANS-4 : Black & White Transmission Densitometer (with built-in light source)

· Built-in light source (Trans-4)
· Press-button operation
· Portable, battery operated
· Auto ZERO
· Excellent repeatability

     TRANS-4 is a battery operated hand-held black and white Transmission Densitometer with built-in light source. It has achieved the accuracy and stability not so far offered in portable / field instruments. Its size and shape makes it an ideal portable instrument for use in the plant or in the field as well as in the laboratory.

      The TRANS-4 has its own light source and TRANS-4E has an external sensor with 1meter cable. It is used with an external light source, like a film  viewer. Key pad controls for POWER, LAMP, ZERO and READ operations make these instruments very easy to use. Just press READ & ZERO to set zero. Insert film and press READ to get optical density D.
     Advanced low power circuitry allows a long charge life for the rechargeable batteries without sacrificing performance.

These easy to use compact instruments measure optical density of films mostly used for X-Ray films and 
printing/photography films. These Densitometers have a range of 0 to 4 D with an accuracy of ± 0.01D. 
They are quite rugged and designed for industrial use.




Colour Response

Black & White only

Light source

Built-in Sensor & Lamp

External Sensor (1 M cable) & Light Source e.g. viewer

Measuring Range
Measuring Area (aperture)
Measuring Length (throat depth)
Measuring Accuracy

0.00D to 4.00D
2.0 mm dia
 ± 0.02D


 ± 0.02D

Stability ---  Zero
                ---  Slope

± 0.02D per 8 hrs max
± 1% per 6 months max

Temperature --- Operating
                       --- Storage

10° C to 50° C
-30° C to 50° C


3 ½ digit LCD (10 mm)

Key pad controls


Battery Charge Life

 Approximately 1000 readings.

Battery Check

LOW BAT legend in display


L190 x W78 x H50 mm

Weight with batteries

700 Grams

Reliable Measuring Instruments Since 1979 from       

  Marketed By

Pvt. Ltd.

Hardness Tester, Tachometers, Humidity Meter, UV- Meter,
LUX Meter,  Moving Massage,  pH, Temperature Meters.
Portable Viewers

110, Nirmal Industrial Estate, Near Sion Fort, Sion (East), Bombay-400 022 (INDIA)
Phone : 407 1055, 409 2087, 
Fax : 91-22-407 4244
email :  Website :

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