The CM-512m3A is a portable multi-angle spectrophotometer especially designed for colour measurement of metallic and effect paints and plastics. It uses 0° viewing and illumination at 25°, 45° and 75° angles geometry, optimized for fast and accurate measurements in the automotive production line QC.

This special geometry is truly symmetric and therefore unaffected by instrument orientation. In addition, the optical system is optimized to give very accurate results even on curved surfaces. Therefore samples such as front and rear bumpers, vehicle mirror bodies’ or door handles can be measured fast, accurately and repeatedly. The CM-512m3A is extremely rugged as it is free of moving parts.


Model CM-512m3A
Illumination / Viewing system 3-angle circumferential illumination (25°, 45°, and 75°) /0° viewing angle
Wavelength range 400 to 700 nm
Wavelength pitch 20 nm
Photometric range 25°: 0 to 300% reflectance; 45°, 75°: 0 to 200% reflectance; Resolution: 0.01%
Light source 3 pulsed xenon arc lamps
Minimum measurement interval 7 seconds (when measuring a white calibration plate at 23°C)
Battery life Alkaline manganese batteries: Approx. 400 measurements at 10 sec. intervals (when dark color is measured)
Measurement/ illumination area Ø 12 mm / Ø 20 mm
Repeatability Spectral reflectance: Standard deviation within 0.30%
Colorimetric values: Standard deviation ΔE*ab within 0.05
(Measurement conditions: White calibration plate measured 30 times at 10s intervals)
Measurement mode Single measurement/automatic averaging of multiple measurements (auto mode: 3, 5, 8 times/manual mode)
Interfaces RS-232C Terminal; D-sub 9-pin (female)
Display Dot-matrix reflective LCD with 21 characters ×7 lines (128 × 56 dots)
With contrast control slide
Display data Colourimetric data: L*a*b*, L*C*h
Colour difference data: Δ(L*a*b*), Δ(L*C*H*), ΔE*ab, CMC(l:c), ΔE00(CIE DE2000)
Other data display: FF value, line graph, temperature
Observer condition CIE: 2° and 10° standard observer
Illuminant condition CIE: A, C, D50, D65, F2, F6, F7, F8, F10, F11, F12 (simultaneous evaluation is possible using two light sources)
Temperature detection Detector: Thermopile
Wavelength: 8 to 13 µm
Measurement/display range: -10 to 80°C (0.1°C increments)
Measurement diameter: Ø 20 mm
Measurement rating: 0 to 50°C: ±2.5°C ±1 digit (when an object of 0.93 emissivity is measured at ambient temperatures of 18 to 28°C)
Operating temperature / humidity range 0 – 40°C; relative humidity 85% or less (at 35°C) with no condensation
Storage temperature / humidity range -20 – 45°C; relative humidity 85% or less (at 35°C) with no condensation
Power Four AA-size batteries or AC adapter AC-A308
Dimensions (W x H x D) 115 × 257 × 164 mm
Weight Approx. 1.4 kg (without batteries)
Standard accessories Hard case, White calibration plate, RS-232C cable, AC adapter, AA-size battery (×4)
Optional accessories Accessory Switch CM-A23; Measuring Stand CM-A30; Grip CM-A43;
Zero Calibration Box CM-A32; Thermo-Printer DPU-S245-01;
SpectraMagic™NX (software); CM-S20W Hitching software

Specifications and drawings are subject to change without prior notice.