Detection Type:. Double beam photometer. Rush:. < 1.5 x 10^-5 AU peak-to-peak at 254 nm, flowing water at 1 ml/min, 1 second response time (10-90%), standard flow cell. Drift:. < 5 x 10^-4 AU/hour at 254 nm after warm-up. Wavelength range:. 190 - 600 nm, adjustable in 1 nm steps. Wavelength accuracy:. ±2 nm. Wavelength repeatability:. ±0.3 nm. Bandwidth:. 6.5 nm. Linear absorbance range:. Better than 1% up to 1.2 AU with acetone at 265 nm. Response time:. 0.25, 1 or 4 seconds (10-90%); user selectable. Spectra:. Storage of 1 spectrum during the run; Scan speed 10 nm/sec. ; Range from 190 to 600 nm, selectable. Tracking plotting speed from 1 to 50 nm/sec. selectable; Plotting the corrected background spectrum. Light source:. Deuterium lamp of 1090/40/50 DAD. Flow cells:. Standard cell with 14 µl volume, 8 mm path length and a maximum pressure of 40 bar (588 psi). Optional micro, preparative, high pressure cells are available. Advertisement:. Single-line, 16-character fluorescent display with real-time display of operating parameters and/or absorbance. Steering:. Integrated keyboard with function keys; Editing of parameters possible during the run; keyboard lock; Optional control via computer or 3396 Series II integrator. Parameter:. Wavelength, output range, response time, zero setting, offset, balance, spectrum capture. Diagnostic aids:. Wavelength calibration test with holmium oxide filter. Time programs:. Time programmable wavelength and output range; Storage of up to 5 time programs. Analog output:. One output can be configured as a recorder or integrator. For the recorder: 100 mV or 1 V output range from 0.001 to 4 AU, user selectable; for the integrator: 100 mV/2 AU full scale or 1 V/2 AU full scale, user selectable. Communication:. START (input/output), STOP (input/output), READY (output), POWER OFF (output) to synchronize with other LC modules. Safety aids:. Comprehensive diagnostics, error detection and display via front panel LEDs. Leakage detection, safe leakage handling, leakage output signal to shut down the pump system. Low voltage in key maintenance areas. Vicinity:. Temperature range: 5 to 55°C. Humidity: <95% (non-condensing). Performance requirements:. Mains voltage: 100-120 or 220-240 VAC ±10%. Mains frequency: 48-66 Hz. Power consumption: maximum 150 VA. This refurbished HP 1050 Variable Wavelength Detector (VWD) is in excellent condition. We are professionals Labprocure bears responsibility for this device.