Photomultiplier tube unit

H12694A-25

H12694A series is an NIR-PMT unit using a compact NIR-PMT (near infrared photomultiplier tube) developed by our advanced photocathode technology. The NIR-PMT is contained in a thermally insulated sealed-off housing evacuated to a high vacuum. The internal thermoelectriccooler eliminates the need for liquid nitrogen and cooling water. The light input window of these modules use a condenser lens to provide a virtually larger photosensitive area allowing easy optical coupling. Adapters for connection to an optical fiber and monochromator are also available as options.
The H12694A-25 (InP/InGaAsP photocathode) is high sensitivity NIR-PMT unit with spectral response range from 950 nm to 1200 nm.

Features

  • High sensitivity
  • Built-in thermoelectric cooler and gate circuit
  • Low noise

Applications

  • Photoluminescence measurement
  • Singlet oxygen measurement
  • Atmospheric LiDAR

Characteristics

Spectral response

Gain

Waveform

Transit time spread (T.T.S.)

Specifications

Parameter Value Unit
Spectral response 950 to 1200 nm
Peak sensitivity wavelength 1100 nm
Photocathode material InP/InGaAsP
Detection area for collimated light Φ18 mm
PMT operating temperature -60
Guaranteed PMT operating voltage -500 to -900 V
Operating ambient temperature +5 to +40
Storage temperature -20 to +50
Max. average output signal current 1 µA
Cathode*1*2 Quantum efficiency Min. 1
Typ. 2
Radiant sensitivity Min. 9 mA/W
Typ. 18
Anode*1*2 Radiant sensitivity Min. 4 x 103 A/W
Typ. 1.8 x 104
Dark current*3 Typ. 0.4 nA
Max. 1
Dark count*3 Typ. 2.5 x 103 s-1
Gain*2 Min. 5 x 105
Typ. 1 x 106
Time response Anode pulse rise time Typ. 0.9 ns
Anode pulse fall time Typ. 1.7
Transit time spread Typ. 0.4
Cooling method Thermoelectric (Forced air cooling)
Condenser lens Material BK7 AR coating
Transmission wavelength 900 to 1700
F number 1.4 (f=25.7)
Cooling time required for operation Approx. 20 min
Protection function High voltage interlock for inappropriate temperature
Controller rating Input voltage (AC) 90 to 264 (50 Hz / 60 Hz)
Power consumption 125 VA
Weight*4*5 Main unit Approx. 2.13 kg
Controller Approx. 2.90

*1 At peak sensitivity wavelength.

*2 At -800 V input voltage and -60 °C operating temperature.

*3 After 30 min storage with cooling in darkness. (Anode radiant sensitivity 1.0 × 104 A/W)

*4 Including resistor box with BNC connectors.

*5 Including high voltage cable and control cable.

Dimensional outline (Unit: mm)

Main unit

Controller

Accessories

High voltage cable

Control cable

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