You have been redirected to your local version of the requested page

The PTRam is a compact rack-mountable Raman analyzer designed for product and process development and used in analytical labs and pilot plant settings. Equipped with a 785-nm laser and fiber optic probe, the PTRam offers the benefit of high throughput Raman applicable to most samples.

  • High-performance, precise, rugged, and reliable spectrometer
  • Long-lasting, rock-solid laser stability for consistent results
  • Self-calibrating, self-monitoring with automated system validation to ensure the validity of each measurement for 24/7 real-time monitoring
  • Single channel fiber-optically coupled sample probe with user-replaceable shaft, customizable for your measurement conditions

Data sheet: PTRam (280001297-A, PDF, 825 KB)

Easy, out-of-the box operation

The PTRam is a compact, sensitive, and robust Raman spectrometer that can be placed on the bench or in a rack-mount cart. Just connect the fiber optic probe, plug it in and start your measurements, easily moving it to the process you are developing. With the PTRam you can increase your process understanding and decrease development time with real-time process monitoring.

In addition, the PTRam is a stable system, with high repeatability and reproducibility. It includes internal monitoring of system temperature and Raman shift, ensuring precise measurements throughout your analysis.

Flexible sampling accessories


Fiber-optic sampling makes it easy to take your measurement to your sample, and measure through the transparent vessel wall.

The interchangeable fiber-optic probe shaft expands the capabilities of the PTRam with shafts operable in diverse environments. We also offer custom sampling interfaces suited to your unique needs.

Flyer: PTRam Process Development Raman Analyzer (400000420-A, PDF, 2.46 MB)

Brochure: B&W Tek Portable Raman Probes (400000425-A, PDF, 2.19 MB)

Specifications for PTRam
Part number BWT-840001200
Laser 785 nm
Spectral range 150-2800 cm-1
Spectral resolution ~6 cm-1 @ 912 nm
Laser power Max.  340 mW; power software-controllable from 0 to 100% at 1% increments
Weight 14.5 kg
Dimensions 52 x 48 x 19 cm
Operating temperature 15 ˚C - 30 ˚C
Storage temperature -15 ˚C - 50 ˚C
Relative humidity 10% - 85%, non-condensing
Input voltage 100-240 V AC 47-63 Hz
Power consumption 100 W (Max)
Warm-up time 5 minutes
Raman shift calibration auto-calibration internal reference
Standard fiber optic probe shaft  304 SS with sealed quartz window for non-immersive use
Shaft length 3” (76.2 mm)
Shaft diameter 0.371” (9.42 mm)
Maximum probe operating temperature (shaft and probe body) 80 °C
Fiber length 1.5 m
Looking for perfect system fit?

Talk to your Metrohm representative and learn about the best solution for your needs!

Find applications for Raman spectroscopy

Explore Metrohm Raman analyzers