The DFP 402 and the DFP 406 are compact Dot Meters, battery operated, extremely easy to use and to understand. With high accuracy they measure the dot area of lithographic plates regardless of graining, contrast and colour because of their sophisticated multidirectional reading optical system, detector sensitivity and high resolution unique 10.000 divisions between the printing and the non-printing parts of the surface.

They provide both reflection and transmission (film) dot measurement, so they are not only the ideal calibration tool for any computer to plate system but also the perfect tool for prep room, plate room and pressroom to check if your plate is satisfactory and to pinpoint problems early on and eliminate them before going to press.

With the standard RS-232 interface you can link both the DFP 402 and DFP 406 to a computer for data collection and analysis or to a serial printer. The DFP 402 calculates the dot area using the Murray-Davies equation and is the least expensive dot meter on the market.

The DFP 406 calculates the dot area using the Yule-Nielsen equation to eliminate the effect of optical dot gain. With its specialised software it is very easy to enter the N correction factor for your plate. This can be either manual entry or automatic calculation of the N correction factor.

The DFP 406 is the best for polyester plates, for silver based plate emulsions and for difficult computer to plate materials.

Because of its density function the DFP 406 is recommended also when you have to check plate exposure and development measuring plate density.

DFP 402 Murray-Davies formula to calculate dot area
DFP 406 Yule-Nielsen formula with manual entry or
automatic calculation of N correction factor
Dot area Percent: 0.0 – 100.0% with a decimal place
Negative Percent: 100.0% - 0.0% with a decimal place
Accuracy: +/- 0.2%
Density: 0.000 – 2.300 D (DFP 406 only)
Aperture: 3,5 mm
Display: LCD : two lines of eight characters
Warm up time: none
Operating temperature range: 5°C – 40°C (41°F – 104°F)
Measurements per charge: 15.000
Power supply: Ni-Cd batteries
Weight: 360 gr.
Dimensions: 125 x 67 x 48 mm.

Operation manual
AC adapter-charger
Carrying case
Serial interface