An essential tool for serious photography, a densitometer enables you to establish your personal film speed and correct development time to ensure the resulting negatives record as much detail as possible, and are easy to print. In addition you can fully characterise your films and papers to gain a complete understanding of the process and a concomitant improvement in the quality of the final print. For basic everyday film speed and development calibration, the densitometer function built into RH Designs exposure meters is perfectly adequate, however the serious worker will want to progress to the higher standards offered by a purpose built densitometer, and the Heiland range provides such standards at a very reasonable cost. Heiland densitometers are designed and produced by Heiland Electronic GmbH in Wetzlar, Germany, to laboratory standards and are rugged and reliable.Densitometer

Wide area of application

Dual modes (transmission and reflection) allow density measurements of black & white film, RC and FB paper, ink-jet paper as well as X-ray films, graphics and pre-press applications. Measurement results are continuously displayed in units of logarithmic density (log.D), or in dot percentage (TRD-4) or Zones (TRD-Z). Typical applications include:

  • RIP and printer calibration
  • Calibration of multigrade papers and enlargers
  • Calibration of films and developers
  • Determination of true film speed
  • Determination of contrast and range.

Instrument Description

Heiland densitometers are built in a rugged metal enclosure and powered by mains voltage (90 - 250v AC, 50-60Hz). The densitometer comprises the base unit and a hinged measurement arm which houses the sensor, connected by a precision bearing. The transmission measurement light is emitted through an opal diffuser; for reflective measurements the light is emitted at 45 deg. to the paper. The top of the base unit serves as a platform where the film or paper rests during measurement.

The illumination and display are activated automatically when the measurement arm is lowered. The 3-digit LED display allows a precise reading, and can be reset to “0.00” at any time to act as a zero datum.

The TRD series includes the TRD-2, a general purpose unit reading in log.D only, the TRD-4 which is designed for pre-press and press applications, and the TRD-Z, a specialist unit designed specifically for Zone System usage.

Other models are available for different applications such as microfilm and X-ray measurements - please contact us for details.

Model descriptions and prices on this page

Options are available.

Technical Specifications

Dimensions (LWH)

200 x 130 x 135mm


1 Kg

Power requirements

90 - 250v AC, 50-60Hz, 6VA


315mA time lag

Aperture Diameter - (select one, or select Option.02)

0.5, 1.0, 2.0, 3.0 mm

Light source


2700K, diffused


2700K, directed

Max. subject size (width x thickness: length infinite)

260mm x 2mm

Maximum measureable density: transmission

aperture 3.0mm

4.0 log.D

aperture 2.0mm

3.5 log.D

aperture 1.0mm

3.0 log.D

aperture 0.5mm

2.0 log.D

Maximum measureable density: reflection

aperture 3.0mm

2.5 log.D

Reading variation

+/- (1% +0.02 log.D)

Repeat accuracy

+/- 0.01 log.D

Temperature range

17-27C, 62-81F

Relative humidity

0 - 70%

Accessories supplied

2 calibration strips

Factory Calibrated - a Stable Tool

The instrument is calibrated at the factory. A certification document and two calibration check strips are shipped with the instrument with documented density values. Normally the densitometer does not need recalibrating for several years.


The instrument carries a full two year parts and labour guarantee. Damage caused by improper handling or misuse is excluded.

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