Teledyne T100 Manuale Utente

The T100 uses a photo multiplier tube (PMT) to detect the amount of fluorescence 
created by the SO

2

 and O

3

 reaction in the sample chamber. 

PMT Housing End Plate 

This is the entry to the PMT Exchange

PMT Preamp PCA 

High voltage Power Supply 

(HVPS) 

PMT Cold Block 

Connector to PMT 

Pre Amp PCA 

12V Power 

Connector 

Cooling Fan 

Housing 

TEC Driver PCA 

PMT Heat Exchange Fins

Light from Reaction 

Chamber shines 

through hole in side 

of  Cold Block 

Insulation Gasket 

PMT Power Supply 

& Aux. Signal 

Connector 

PMT Output 

Connector 

Thermo-Electric Cooler 

(TEC) 

PMT Temperature 

Sensor

O-Test LED 

 

A typical PMT is a vacuum tube containing a variety of specially designed electrodes. 
Photons from the reaction are filtered by an optical high-pass filter, enter the PMT and 
strike a negatively charged photo cathode causing it to emit electrons. A high voltage 
potential across these focusing electrodes directs the electrons toward an array of high 
voltage dynodes. The dynodes in this electron multiplier array are designed so that each 
stage multiplies the number of emitted electrons by emitting multiple, new electrons. 
The greatly increased number of electrons emitted from one end of electron multiplier is 
collected by a positively charged anode at the other end, which creates a useable current 
signal. This current signal is amplified by the preamplifier board and then reported to the 
motherboard. 

06807C DCN6650