The PX-2 Pulsed Xenon Lamp is a high flash rate, short-arc xenon lamp for the UV (220-750 nm), for applications requiring absorbance, reflection, fluorescence and phosphorescence measurements, and especially for measuring optically or thermally labile samples. 

The PX-2 operates at speeds up to 220 Hz, offers excellent pulse-to-pulse stability, and has two trigger modes for software control of the flash rate.

The PX-2 Pulsed Xenon Lamp is available for just . Replacement bulbs (PX-2-B) are .

For applications requiring a xenon source of higher intensity, consider the HPX-2000. The HPX-2000 is a 35-watt, continuous-wave short-arc lamp with a spectral range of 185 nm-2.2 µm. 

About the PX-2

Any external TTL positive pulse can be used to trigger the PX-2. With the PX-2 coupled to an S2000 Spectrometer, the user can easily synchronize operation of both the light and detector.

The PX-2 features a switch to select TTL signals that provide two modes of operation. In the Multiple mode, the flash timing is invariant and is set by jumper blocks in the S2000. The spectrometer sampling can be altered so that a variable number of flashes are observed during each integration period. The Multiple mode is especially useful for absorbance and reflection applications, as it ensures steady, consistent light exposure for each integration period.

In the Single mode of PX-2 operation, a single flash occurs during each integration period. The flash rate is modified by changing the integration period.

Because it produces a pulsed signal, the PX-2 is less likely to contribute to solarization in optical fiber assemblies, which can occur when fibers are illuminated with signal <260 nm.

Additional Features and Information on Interface Features

The PX-2 comes with a 12 VDC power supply.

The PX-2 comes with a 15-pin interface cable, which connects the lamp to the spectrometer. The PX-2 has an SMA 905 connector that couples to Ocean Optics miniature fiber optic spectrometers and accessories, including optical fibers, cuvette holders, probes and other sampling optics. Also available for use with the PX-2 is the CUV-FL-DA, a direct-attach cuvette accessory for absorbance and fluorescence measurements. CUV-FL-DA is available for only $461.

PX-2 Spectral Output

PX-2 Specifications

Spectral range:	220-750 nm
Approximate dimensions:	14 cm x 10.5 cm x 4 cm (LWH) 5.5" x 4.1" x 1.5" (LWH)
Power input:	1.3 A @ 11V @ 220 Hz 100 mA @ 12V @ 10Hz
Trigger input:	external TTL positive pulse via 15-pin connector
Output:	45 microjoules per pulse maximum 9.9 watts average power from bulb (not the same as power  coming out of fiber; see graph above) 220 Hz pulse rate maximum
Pulse duration:	5 microseconds (at 1/3 height of pulse)
Lifetime:	109 pulses (estimated 230 days continuous operation at 50 Hz pulse rate)
Aperture:	3 mm
Connector:	SMA 905
Timing signals available from S2000:	Multiple mode: up to 220 Hz (varies with A/D sampling frequency); Single mode: varies with scan rate

PX-2 Ordering Information

Item	Description
PX-2	Miniature pulsed xenon light source for UV-VIS (220-750 nm)
PX-2-B	Spare bulb for PX-2
PX-2-FIRMWARE	USB2000 Spectrometer firmware version needed to operate the PX-2 in pulsed mode