Metal package PMT
Photon Counting Head H7155 Series
The H7155 series are compact photon counting head devices consisting of a
metal package photomultiplier tube along with a high-speed photon counting
circuit and a high-voltage power supply circuit. The high voltage supply for
photomultiplier tube and the discriminator level are preset to optimum values,
allowing photon counting measurement by just connecting a +5 V supply.
The H7155-20 has an internal prescaler of division by 4. This prescaler im-
proves the count linearity 4-fold compared to the H7155.
Product Variations
Type No.
H7155
H7155-20
Spectral Response
300 nm to 650 nm
Prescaler
No
Yes
Specifications
Parameter
Input Voltage
Max. Input Voltage
Max. Input Current
Effective Area
Peak Sensitivity Wavelength
300 nm
400 nm
Count Sensitivity
500 nm
600 nm
Count Linearity *
1
Typ.
Dark Count *
3
Max.
Pulse-pair Resolution
Output Pulse Width
Typ.
Output Pulse Height *
4
Min.
Recommended Load Resistance
Signal Output Logic
Operating Ambient Temperature
Storage Temperature
Weight
H7155
+4.5 to +5.5
+6
50
8
420
1.2
脳
10
5
2.7
脳
10
5
2.2
脳
10
5
2.1
脳
10
4
1.5
脳
10
6
100
500
70
30
3.6
3.0
50
Positive logic
+5 to +40
-20 to +50
75
H7155-20
70
Unit
V
V
mA
mm
nm
1.2
脳
10
5
*
2
2.7
脳
10
5
*
2
2.2
脳
10
5
*
2
2.1
脳
10
4
*
2
10
脳
10
6
*
2
100 *
2
500 *
2
10
Depends on count rate.
2.2
2.0
s
-1
路pW
-1
s
-1
s
-1
ns
ns
V
鈩?/div>
鈥?/div>
擄C
擄C
g
*1: Random pulse, at 10 % count loss
*2: Output count will be decreased to 1/4 after the prescaler.
*3: After 30 minute storage in darkness
*4: With input voltage +5 V, Load resistance 50
鈩?/div>
and Coaxial cable RG-174/U (450 mm)
38
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