Environmental Monitor (RH Temp UV & LUX)
It is recognised that a major cause of damage to museum works of art can be light, with the most damaging being the UV content. To enable curators and conservators to monitor these levels we offer a proven range of instruments. These meters measure proportion of UV present (µW/Lumen), the total amount of UV (µW/M²) and the amount of visible light present (Lux). The amount of UV should be as little as possible and in general should not exceed 20µW/M² or 75µW/Lumen. Normal museum light levels should be limited to 150-250 Lux. Once measurements have been observed action can be taken, light levels altered, if necessary UV filters fitted to display cases, windows and fluorescent tubes.
This single instrument measures humidity (RH), Temperature (Degrees C/F), Ultra Violet (UV) and Visible Light (LUX).
The appropriate button is pushed depending on the measurement required and the reading taken. The environmental monitor automatically turns off 10 seconds after the last reading unless a button is held down for over 5 seconds, this allows continuous monitoring until another button is pressed. The large 8m line display enables an easy to use menu system to select more advanced functions. Data Logging functions enable over 10,000 readings of all four parameters to be automatically taken at selectable intervals (every 10 seconds to 1 hour). The saved data can be transferred to a computer by wireless infa-red link (IRDA compatible). Modern computers have infa-red interface built in, for those that do not adapters are available.
Software is provided to save the logged data in a CSV format that can be accessed and displayed by many applications (e.g. Microsoft Excel). Maximum and minimum values and their time measurement are displayed for each parameter. A calibration kit is available for user calibration of the RH sensor using saturated salt solutions.
Visible wavelength: 400-700nM
Visible power: 0.1-200,000 Lux
UV wavelength: 300-400nM
UV power: 2-50,000 µW/M²
UV proportion: 0-10,000 uW/Lumen
RH Range: 0-100%
Display Resolution LUX: 0.1 up to 100 then 1. footcandles: 0.1 up to 100 then 1. UV: 0.1 up to 100 then 1. proportion of UV 1 uW/Lumen. Temperature: 0.1°C or °F. RH: 0.1%
Accuracy: Light & UV: 5% +/- 1 displayed digit. Temperature: +/- 0.5°C (+/- 0.9°F). RH: +/-2.5% 0-90% otherwise +/-5%
Data logging intervals: 10 sec (30 hours). 1 min (7.5 days). 10 mins (75 days). 1 hour (454 days)
Data logging capacity: 10,900 readings of all 4 parameters
Batteries: 2 x alkaline AA type
Dimensions: 150 x 65 x 25mm (including probes)
Weight: 165g