H7844_15 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – PHOTOSENSOR MODULE

PHOTOSENSOR MODULE
WITH THERMOELECTRIC COOLER
H7844
Improved detection limit for near infrared (to 900 nm)
FEATURES
GLow dark current (1/50 of that at room temperature)
GFast cooling (3 minutes) by thermoelectric cooler
directly coupled to the photocathode
GWide dynamic range
GFree of condensation
APPLICATIONS
GNOx Gas Detection
GFluorescence Detection (LIF, Fluorescence Spectrophotometer)
GChemiluminescence Detection
GNIR Spectroscopy
COOLING SPECIFICATIONS
Parameter
Cooling Method
Max. Cooling Temperature (∆T) *¹ *²
Cooling Time *¹
*1: Input current to thermoelectric cooler = 2.1 A
Description / Value
Thermoelectric cooling
20
Approx. 3
*2: Photocathode temperature difference from ambient
Unit
—
°C
min
COOLING CHARACTERISTICS
GS/N Ratio During Cooling
TPMOB0212EA
20
OFF ON
OFF ON
15
SN
Improved
4 Times
G Anode dark current after cooling has started
TPMOB0181EA
10
(at 25 °C)
CONTROL VOLTAGE: +1.0 V
(PMT SUPPLY VOLTAGE: -1000 V)
1
10
When Not Cooled
When Cooled
5
Light Source: LED 850 nm
Energy: 4.9 × 10^-14 W
OFF ON
Data Acquisition Speed: 8 times/s
0
0
10
20
30
OFF
40
ON
50
TIME (s)
0.1
0.01
0
1
2
3
4
5
TIME (min)
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Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2013 Hamamatsu Photonics K.K.