Spectroline quartz pencil lamps are small, low-pressure, mercury-vapor discharge lamps made of double-bore material with both electrodes at one end. They are very stable lamps, when used properly, and maintain a high output of ultraviolet radiation over thousands of hours. This long life and stability is especially important to instrument manufacturers incorporating these lamps into their equipment.

Spectroline pencil lamps have a spectral emission characteristic of a low-pressure mercury discharge consisting of many well-separated lines in the ultraviolet, visible and infrared parts of the spectrum (see Figures 1 and 2). They are widely used as spectral calibration sources in spectroscopy, chromatography and photometry, and a multitude of other laboratory and industrial applications.

11SC-1 Short Wave UV Lamp

Average Intensity — 4,500 µW/cm2 of 254nm (2537 A°U, 254mµ) radiation at 1" (2.54cm).

Housing — The quartz tube is bonded inside a phenolic handle with Viton™ and a special insulating resin. A 24" (61cm) ozone-resistant cord set with plug is provided for attachment to the Spectroline SCT-1A power supply.

Dimensions — The lighted length of the tube is 21⁄8" (5.30cm), 1⁄4" (0.65cm) OD. The handle is 3⁄8" (0.95cm) OD and 5⁄16" (0.79cm) ID. The total length of the lamp housing is approximately 5" (12.7cm).

Operation — The lamp plugs into the Spectroline SCT-1A power supply.

Net Weight — 2 oz. (60g).

Light Shields — The 11SC-1 lamp is available with A, B and C shields as options (See Accessories).

11SC-2 Short Wave UV Lamp

Average Intensity — 2,000 µW/cm2 of 254nm (2537 A°U, 254mµ) radiation at 1" (2.54cm).

Housing — Same as 11SC-1.

Dimensions — The lighted length of the tube is 3⁄4" (1.91cm), 1⁄4" (0.65cm) OD. The total length of the lamp housing is approximately 31⁄2" (8.9cm).

Operation — Same as 11SC-1.

Net Weight — 11⁄2 oz. (40g).

Light Shields — Not available.

SCT-1A Power Supply

The separately housed Spectroline SCT-1A power supply provides correct electrical characteristics for efficient operation of the 11SC-1, 11SC-2 and 36-380 lamps. The SCT-1A provides 1,200 volts open circuit for starting the lamps — considerably above the 800 volts needed. The 11SC-1 and 36-380 will operate at 295 volts and 18mA; the 11SC-2 will operate at 205 volts and 18.5mA.