X-Rite 301 Transmission Densitometer

X-Rite 301 Transmission Densitometer

The Standard of the Industry

*NOTE: This product has been discontinued, the replacements are:

LCNDT DT-300 Kowotest Kowodens TD


The X-Rite 301 Densitometer is a rugged tabletop unit that is recognized as the industry standard for accurate measurement of film densities. It provides highly repeatable and accurate measurements of film densities up to 5.0D and is more subtle than can be seen by the naked eye. An optional RS-232 interface enables data transfer to most PCs and some serial printers. This densitometer is ideal for radiographic and other applications.

Convenient Operation:

  • The densitometer is easy to use.
  • Measurements are made on a push and read basis.
  • The display consists of large LED numerals which can be read easily in bright or dim light.
  • Internal memory and the null button allow the operator to make comparative density measurements across a piece of film.

Quality features include:

  • Lighted Table, simplifies location of image areas to measure
  • Simple calibration procedure.
  • Rugged construction. Proven oil field use.
  • The densitometer will remain in proper alignment even though it is picked up by the arm.
  • The Model 301 is U.L. listed and is shipped calibrated to standards traceable to the NBS.
  • This is the most widely accepted densitometer for industrial x-ray requirements.
  • Easy-to-Read Display: Large half-inch LED numeric display for easy reading and fewer errors.
  • Convenient Service; Modular construction allows rapid replacement of lamps and easy access to electronic circuits.
  • One Year Manufacturer Warranty


  • 301X—230V, 50Hz power
  • 301RS—RS-232 serial output—300 baud

The X-Rite 301 Includes:

  • X-Rite Instrument
  • Built-in Aperature (2.0mm)
  • 1, 2 and 3 mm Aperatures
  • Calibration Strip
  • AC Adapter & Power Cord
  • Warranty Registration
  • Calibration Certificate


Measuring Range: 0 - 5.0D with 2mm and 3mm aperatures
0 - 4.0D with 1mm aperature
Accuracy: ±.02D
Repeatability: ±.01D
Operating Temperature Range: 10°C - 40°C (50°F - 104°F)
Power Requirements: 301 (Domestic): 100 - 130VAC, 60Hz
301X (Export): 200 - 240VAC, 50Hz (80VAC max.)
Warm Up Time: 60 seconds
Scale Factor (slope) Stability: ±1% per 6 months
Null Drift: ±.03D max.
±.01D typical
Options: 301X - 230V, 50Hz power line
301RS - RS232 serial
Output - 300 baud
Physical Dimensions: 5.25" H (13.3cm)
10.25" W (26cm)
15.0" L (38cm)
Weight: 8.5 lbs (3.9 kg)

**Please note: If the aperture set and/or lamp assembly are purchased separately from the X-Rite 301 Densitometer, there will be a $5.00 handling fee.**

Note: There will be a $25 small order fee for X-Rite orders under $200.

Description Part # Saved Price Select Option Add to
X-Rite 301 Densitometer, 110VAC RT-XTDM-301 Discontinued Item
X-Rite 301 Densitometer, 220VAC RT-XTDM-301X Discontinued Item
X-Rite 301 Aperture Set (1, 2, & 3 mm) 319-40 RT-XTDM-319-40 Discontinued Item
X-Rite 301-21 Lamp Assembly RT-XTDM-301-21 Discontinued Item
X-Rite Calibrating Screwdriver for 301 and 331 Series RT-XTDM-SD117-01 Discontinued Item