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DH_30 Multi-Alkali Photomultiplier (200-850nm)

  • DH_30 detector 200-850nm

Housing a side-window multi-alkali (S20 photocathode) photomultiplier tube, a mu-metal shield and a PCB based dynode chain, reliable operation can be ensured. The 215 high voltage supply module maintains the photocathode at a negative high voltage. The photocurrent generated by this detector is best measured using the 487 picoammeter or the 477 pre-amplifier followed by the 496 lock-in amplifier.

The mounting flange supplied with the DH_30 is compatible with the entire range of Bentham monochromators and accessories.

Core benefits


  • Housed photomultiplier tube featuring mu-metal shield and PCB dynode chain
  • Operated in either the DC or AC regimes
  • Compatible with Bentham's entire range of monochromators and accessories
  • Recommended for use with 400 series detection electronics


Active area20x8mm
Window materialUV Glass
Number dynodes9
Dynode chain resistance- Linear: 750 kΩ
- Pulse Counting: 3.92 MΩ
Operating modePhotoemmisive
Spectral response range200-850nm
Peak wavelength (typ.)420 nm
Dark current (typ.)500pA at 750V
NEP1.3 x 10-16 W.Hz-1/2
Max. high voltage1250V DC
Max. anode current100μA
Max. operating temperature-30 to +50°C


CompatibilitySupplied with an interface plate, 4 x M3 clearance holes (Bentham slit pattern)

Ordering Information

DH_30Multi-alkali photomultiplier detector (200-850nm)

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