Compact Head-on PMT
Photosensor Modules H7826 Series
The H7826 series photosensor modules consist of a 19-mm (3/4") diameter
head-on photomultiplier tube and a high-voltage power supply circuit. The
length of the photomultiplier tube used here is short compared to other photo-
multiplier tubes of the same diameter, making it compact even though it has a
large light input diameter of 15 mm. The H7826 also has excellent resistance
to vibration and shock compared to other photomultiplier tubes, making it
ideal for use in portable equipment.
Product Variations
Type No.
H7826
Spectral Response
Features
For general applications in visible range
300 nm to 650 nm
H7826P
For photon counting
H7826-01
H7826P-01
For general applications in visible to near IR range
For photon counting
300 nm to 850 nm
Specifications
Unit
V
H7826
H7826-01
H7826P
H7826P-01
Parameter
Input Voltage
+11.5 to +15.5
Max. Input Voltage
+18
V
Max. Input Current
35
mA
µA
V
Max. Output Signal Current
Max. Control Voltage
100
+1.2 (Input impedance 100 kΩ)
Recommended Control Voltage Adjustment Range
Effective Area
+0.5 to +1.1
V
15
1: 103
mm
—
Sensitivity Adjustment Range
Peak Sensitivity Wavelength
420
60
380
80
420
60
380
80
nm
Min.
Luminous Sensitivity
µA/lm
Typ.
Blue Sensitivity Index (CS 5-58)
Red/White Ratio
90
120
—
90
120
—
10.5
—
10.5
—
—
—
0.2
49
0.2
49
Radiant Sensitivity *1
85
85
mA/W
Min.
10
—
—
—
3
2
Luminous Sensitivity
*
A/lm
A/W
nA
Typ.
50
4.7 × 104
30
1.3 × 104
Radiant Sensitivity *1 *2
Typ.
Max.
Min.
Typ.
Max.
3
2
3
Dark Current
Gain *2
* *
20
—
—
—
20
1.8 × 106
200
1 × 106
2000
—
Dark Count *3
s-1
500
3500
Rise Time *2
Ripple Noise *2 *4 (peak to peak) Max.
Settling Time *5
1.5
1
ns
mV
s
0.2
Operating Ambient Temperature
Storage Temperature
+5 to +45
-20 to +50
70
°C
°C
g
Weight
*1: Measured at the peak sensitivity wavelength
*2: Control voltage = +1.0 V
*3: After 30 minute storage in darkness
*4: Cable RG-174/U, Cable length 450 mm, load resistance = 1 MΩ, load capacitance = 22 pF
*5: The time required for the output to reach a stable level following a change in the control voltage from +1.0 V to +0.5 V.
26