The HP 8452A Diode Array Spectrophotometer is a single-beam spectrophotometer controlled by a microprocessor. Visible/UV - Range from 190 to 820 nm with 2 nm resolution. It is used when quick measurement is required. It is faster, more sensitive and, according to some, more precise than a traditional spectrometer thanks to the photodiode array detection system. With its diode array technology, the spectrophotometer is significantly faster than conventional devices; it offers more precision, more sensitivity and more reproducible results. Characteristics: . Wavelength range: 190 to 820 nm. Wavelength accuracy: < ± 2 nm. Wavelength reproducibility: ± 0. 05 nm (typical under constant conditions). Spectral bandwidth: 2 nm. Scattered light: at 200 nm = < 0. 05%, at 340 nm = < 0. 05%. Photometric range: 0.0022 - 3.3 Å; 0. 5 second measurements at 350 nm. Photometric accuracy: ±0. 005Å; at 1 Å, 440 nm, NIST 930e. Photometric noise: <0. 0002 Å RMS; at 0 Å, 500 nm, sixty 0.5-second scans. Photometric stability: <0. 001 Å/hr; (at 0 Å, constant ambient conditions, after 1 hour warm-up time): measured over 60 second interval, every 5 seconds. Baseline flatness: <0. 001 Å RMS; 0. 5 seconds idle followed by 0. 5 seconds scan. Shortest scan time: 0. 1 seconds; full area. Fast Scan Mode: 10 scans per second; 70 nm range. Power requirements: Mains voltage: 80-132 or 170-264 V; AC mains frequency: 47-66Hz. Dimensions (L x W x H): 23. 8 in x 16. 7 in x 7. 3 in. Weight: 33. 2 lbs (approx. 15 kg) Labprocure is responsible for this device.