Close distance surface color analysis with 4...20 mA output series A321-X


A321-1 : from 400 to 470 nm

A321-2 : from 470 to 540 nm

A321-3 : from 540 to 660 nm

For technical help or advice on this product, please submit your e-mail address and question here:

Support:  1-800-295-5693
HS Tariff:  9027.30.40.40
ISO-9000 Registered




Series 321 sensor: A surface can be analyzed for color.  The sensor measures color from the surface optically.  4 lights are used: red, green, blue, and yellow.  The results of these measurements and the calculations for color are transferred to an analog output 4 ... 20 mA.


Technical Data:
Power: 24 Volts and 50 mA consumption
Materials: Housing = ABS natural   Seal = Sealon PTFE   Screws = stainless steel 301
Color formula: see color patent
Connection: 9 pole D connector
Work Distance: 5 thou to touching
Resolution: Within 0.1% accuracy in digital steps

User Instructions:  Hook up power to the sensor and choose outputs with P1 and P2


Applications for color on surface:





Processed Food Products

Fuels and Lubricants

Organic Chemistry


Medical and Biology

Water and Sewage

Mineral and Gems

Inorganic Chemistry

Paint Varnish and Glue

Paper and Cellulose

Rubber Industry


Metal and Glass

Fruits and Crops

Bacteria and Fungi on slides

Leaves and Flowers

Purity and Composition of Pills

Color from Dairy Products

Not Applicable

Color in Coal

Color Compositions in Art

Color on Skin

Not Applicable


Color of Minerals

Color of Coated Surfaces

Color of Paper

Not Applicable

Color from Fabrics

Recognition of Metals and Glass Types