AD111 Photobyte-P™ Photomultiplier Detection System

• Provides a complete detection system for SP's Digikrom monochromators. • Easy USB2.0 interface. • Wide selection of PMTs.

Wavelength Range Per PMT detector
High Voltage Range 0-1000 VDC
ADC Resolution 16 bit(Successive Approximation)
Response Rate USB 2.0
High Voltage Resolution 244 mV
Input Voltage ± 5 VDC
Data Resolution 76.3 μV(Data range = 0 ~ 5 V)
Time Constant per Step Selectable from 1 μsec to 10 sec
Conversion Time 2 μsec(Maximum)
USB 2.0 Transfer Rate 480 Mbits/sec
Amplification Gains X1 to X10
Supply Voltage 100-240 VAC
Current Input Range 0 to 5 μA

AP Part
# Code
PMT Type Wavelength Range
and Spectral Response
AD311 R928P* 189-900nm; S-20(extended)
AD321 R212 185-650nm; S-5
AD322 R406 400-110nm;S-1
AD323 R777 185-850nm; S-20
AD324 R636 185-930nm; GaAs(extended)
Selected for low noise

Compact, Convenient, Affordable

The AD111 is a convenient computer controlled photomultiplier detection system for use with Spectral Products’ Digikrom line of monochromators. It features a detector housing that has a dynode divider chain and direct anode connection, mounts directly to exit-slit ports of Digikrom monochromators, and accommodates side-on photomultiplier tubes. (PMT’s must be ordered separately.) It also features the Photomultiplier Amplifier, a compact electronic unit containing the preamplifier and high voltage power supply for the PMT. Coaxial cables for the high voltage and PMT output current signals connect between the detector housing and the amplifier unit. The entire operation, including wavelength and bandpass selection, is controlled with a customer-supplied PC. (The Digikrom monochromator and the AD111 utilize one serial for monochromator and one USB port for AD111) An easy to use program is also included that allows full control of both PMT and monochromator. It graphically displays wavelength versus intensity, intensity versus time and allows ASCII data storage for importing to other user interfaces as desired.