**Colorimeter Ð Pro-A 520**
Colorimeter designed for demanding laboratory and healthcare workflows. The device offers greater titration accuracy, ensuring complete recovery of the nitrogen present in the sample. Its operation requires minimal operator intervention and no prior calibration, simplifying its use and significantly reducing analysis time.

It is specifically designed for the preparation of reagents used in the Pro-Nitro A device, making it an ideal tool for laboratories requiring efficiency and reliability in nitrogen determination.

Spectral range: 400 to 800 nm, using interference filters. Standard 520 nm filter. Expanded ABS range: -0.3 to 3.5 O.D. Transmission reading: 0 to 100 T%. Photometric accuracy: >1% @ 1000 A. Photometric precision: ±1% @ 1000 A. Photometric stability better than 0.004 A/h @ 0.000 A. Light source: Long-life tungsten lamp. Detector: Solid-state (silicon photodiode). Measuring cuvette: Universal support for 10 mm pathlength cuvettes. Minimum reading volume: 1 ml. Alphanumeric LCD display with two lines of 20 characters. Calculation method: Transmission T %, Absorbance, Concentration with factor, and Standard concentration. Internal calibration and software adjustments. RS-232 connection.

**Technical specifications**
– Connection: **RS-232**
– Detector: **Solid-state silicon photodiode**
– Display: **2-line, 20-character alphanumeric LCD display**
– Display type: **2-line, 20-character alphanumeric LCD**
– Measuring cuvette: **Universal support for 10 mm pathlength cuvettes**
– Governed by: **microprocessor**
– Standard filter: **520 nm**
– Light source: **Long-life tungsten lamp**
– Spectral range: **400 to 800 nm, using interference filters**
– Absorbance range: **-0.3 to 3.5 O.D.**