|
|
 OBB’s new PMT housing is an economical, compact, thermo-electrical, air cooled housing for any 28 mm diameter side-on PMT. “The Cool One” increases signal to noise by reducing the dark count of the photo multiplier tube. PMT’s that can detect in the NIR range have higher dark counts; by cooling the PMT the dark count is reduced. As an example, the dark count of our 309 PMT, which has a wavelength range from 400 to 1200 nm, is 270,000 when not cooled—making it virtually useless for detecting almost anything but the strongest signal. When in our cooled housing, the dark count is reduced to just 40 counts. Therefore if one uses tubes that can detect above 600 nm, a cooled housing is almost mandatory.
“The Cool One” can be purchased for virtually any spectroscopy product where a side-on PMT is used and where it can be attached directly to a sample compartment, monochromator, spectrograph etc.
The cooled housing comes complete with high voltage power supply for the PMT as well as a supply and controller for the housing. The temperature and high voltage is monitored with an indicator light signaling when desired temperature (minus 20° C is the ideal for supported PMT tubes) is achieved. High voltage can be controlled either directly on the controller or remotely by software.
|
