EXTEK MODEL 4004 Digital Densitometer

An automatically controlled Digital Densitomater with electronic memory for absolute and difference measuring of silver microfilm densities

Description

Versatile and Simple To Use

The Extek 4004 Densitometer is a 3rd generation instrument with completely automatic controls, including electronic memory for automatic nulling and density comparison measurements. These features enable you to make accurate and repeatable measurements from density - to 5.11. Readings are made simply by pressing a button on the densitometer arm. When the button is released, a digital readout automatically holds the displayed value.

Unique Features

The Model 4004 has push-button zeroing. This feature allows you to compute density by comparisons against a standard, from point-to=point on the same film, or from point-to=point on different films. An illuminated inspection table is incorporated to allow visual examination of areas of interest.

General Features

• Null (Zero) - Remains stable with line variations from 100 to 130 VAC.
• Scale Factor - Factory calibrated to National Bureau of Standards step wedge. Scale factor stability of +/- 1.0%.
• Lighted Table - For ease in finding areas of interest to measure, or visual inspection of film.
• Rugged - Designed to remain aligned, even if picked up by the reading arm.
• Service- Modular construction allows rapid replacement of electronics and lamps.
• Displays - Large, half-inch L.E.D. numeric display for ease of reading
• Warm Up - instantaneous.
• Electronics - Voltage and temperature compensated: includes factory burn in.
• Density Comparison - Null on reference standard and compare density readings.
• Density Subtraction - Excellent features for processor control, subtract high-low readings with the push of the button to give range.

Included as standard items are a spare lamp, 5-step calibration tablet, and operating manual. Service is available from your local Dealer/ Representative, or direct from our factory.

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