ChromaPure Professional with JETI Specbos 1211 and Klein K10a Colorimeter


At some point many professionals conclude that their work requires a reference color analyzer. SMPTE has established standards for such a device. It must measure color accurately to within ±0.002 xy at or above 10 cd/m2 and luminance accurately to within ±0.5 cd/m2 for white field measurements. These are very exacting specifications that no tristimulus colorimeter can achieve, at least for chromaticity. For this level of accuracy you must have a 5nm spectroradiometer.

Unfortunately, such devices are not cheap. The Photo Research and Minolta reference devices start at about $15,000 and go up to near $30,000. The X-Rite i1Pro is reasonably affordable, but it is a 10nm device that cannot routinely achieve ±0.002 xy accuracy. Furthermore, in addition to being expensive, true reference devices also often suffer from practical limitations. They can be slow and have problems with low-light readings.

Recently, a German company JETI Reference Instruments has developed a true reference spectroradiometer, the Specbos 1211, that solves most of these problems.

First, it is relatively affordable, that is at least what passes as "affordable" in the context of reference devices. Second, it is speedy even with low luminance sources. In our testing the 1211 reads a 0.7 cd/m2 test pattern in about 13 seconds. Measurements of a 17 cd/m2 level pattern is 3 seconds or less. It is also amazingly compact and portable and includes a nifty laser spotter that allows for accurate aiming. Finally, it provides a built-in sync detector that ensures that readings will always be synchronized with the frequency of the display being measured. This feature guarantees excellent repeatability on all display types. The only feature this incredible device gives up to the established Photo Research and Minolta competitors is stand-alone operation. The Minolta and Photo Research alternatives allow for aiming through optical sights and readouts on a small LCD screen. They are fully functional devices without a PC. In contrast, the JETI device works only when attached to a PC with custom software.

The 1211 can be used as a working color analyzer. Its speed and low-light sensitivity make it suitable for any calibration task—except perhaps reading black level—where the light level is so low even the 1211 often cannot cope. Fortunately, very low light levels can be accurately read with quite inexpensive instruments, such as the AEMC CA813 illuminance meter. The Display 3 will read down to about 0.007 cd/m2.

Of course, the best possible solution is to combine a reference spectro with a professional colorimeter. This bundle adds the K-10a professional colorimeter, long recognized as the leading colorimeter on the market. For more information about the K-10a, read our review. This combination offers the best possible performance in both accuracy AND speed with excellent low-light sensitivity.


The JETI 1211 is an affordable true reference device. Just mount either on a tripod, facing towards the source, connect to ChromaPure Professional and use as you would any other color analyzer. Add the K-10a for added speed and low-light sensitivity.


JETI 1211
Spectral range: 350-1000 nm
Wavelength resolution: 4.5 nm
Dynamic range (luminance): 0.1–2,500 cd/m2
Dynamic range (illuminance): 2–20,000 Lux
Luminance accuracy: ±2%
Luminance reproducibility: ±1%
Chromaticity accuracy: ±0.002 xy
Chromaticity reproducibility: ±0.0005 xy
Light receiving element: 2048 pixel photo diode array
Standard power supply: USB
Optional Power supply: Bluetooth, RS-232, and LAN
Dimensions: 140 mm x 68 mm x 34 mm
Weight: 450 grams
Operating temperature: 10–40 °C
NIST traceable: Yes
Recommended recalibration interval: 1 Year
Ships with:  
  • USB cable
  • Tripod
  • Diffuser (for illuminance readings)
  • Calibration certificate
  • Operation instructions
  • Transport box with foam insert

Klein K10-A
Receptors Silicon Photocells
Measurement area 43 mm at contact
60 mm at 10 cm distance
70 cm at 4 meters distance
Acceptance angle ±5 degrees
Measurement Distance Any Distance
Display Range (Luminance) 0.0001to 10,000 cd/m2
Display Range (Chromaticity) Displayed as 3 or 4 digit value (selectable)*
Luminance (Meas. Range) 0.00006 to 10,000 cd/m2
Luminance (Accuracy) ±2% (3.00 to 10,000 cd/m²)
Luminance (Repeatability) ±0.1% (3.00 to 10,000 cd/m²)
Chromaticity (Meas. range ) 0.020 to 10,000 cd/m²
Chromaticity (Accuracy) ±0.002†, ±0.004††
Chromaticity (Repeatability) ±0.003 (0.05 to 0.1 cd/m²)
±0.0003 (2 to 10 cd/m²)
Flicker (VESA) (Meas. range) 1 to 150Hz*
Flicker (VESA) (Display Range) 0.0 to 999.9%
Flicker (VESA) (Accuracy) ±1% (flicker frequency: 30 Hz 75% duty cycle square wave)
±1% (flicker frequency: 60 Hz 75% duty cycle square wave)
Flicker (Contrast Method) (Meas. Range) 1 to 150Hz*
Flicker (Contrast Method) (Display Range) 0.0 to 999.9%
Flicker (Contrast Method) (Accuracy) ±.4% (flicker frequency: 30Hz AC/DC 10% sine wave)
Measurement speed (xyY) 8 measurements per second, averaging below 2.7 nits
Measurement speed (Flicker) 384 measurements per second*
Sync Mode Universal
Memory channels 90 stored in colorimeter
RGB Analyzer function Standard
Interface USB or RS-232c (38,400 bps maximum)
Multi-point measurement axis 1,4,5, or 9 probes using Klein K-colorimeter software‡
Software Solutions Chromasurf (available on website)
SDK software (supplied as standard accessory)‡
Operating temperature/humidity range Temperature: 15 to 35°C; Relative Humidity 70% or less with no condensation.
Luminance change: ±2% ±1 digit of reading for white; Chromaticity change: ±0.002
for white, ±0.006 for monochrome from reading of Klein’s standard LCD, 120 cd/
m² at 23°C 40%RH
Storage temperature/humidity range 0 to 28°C: Relative Humidity 70% or less with no condensation; 28 to 40°C:
Relative humidity 40% or less with no condensation
Input voltage range/ power 5V (USB power), ≤150mA
Dimensions 60mm diameter, 265mm length
Weight 570g (1 pound, 4 ounces)


ChromaPure Professional w/JETI 1211 and Klein K10a
JETI 1211 and Klein K10a with ChromaPure Professional software

MSRP $16,188

Call for special price

Klein K10a Standalone

MSRP $6,990

Call for special price

JETI 1211 Options (Standard 1211 comes with a USB connection and diffuser for illuminance readings)  
  • Luminance Only (1211L): Subtract $500
  • Bluetooth Connection: Add $500
  • LAN Connection: Add $150
  • RS-232 Connection: Add $200

(Options will be billed separately)