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St-Series Mercury Lamps from Heraeus Noblelight
 Lamp Selection  An overview of all lamps offered by us for analytical and medical technology
 NK Mercury Lamps  More information on NK series mercury lamps from Heraeus Noblelight
 HG2  More information on HG2 low-pressure mercury lamps from Heraeus Noblelight
 Price List  PDF Price List - Line Sources
Absorption and reflection measurements in photometers are mostly performed at fixed wavelengths. For this purpose medium pressure mercury lamps offer several advantages. The spectrum shows narrow lines in the UV as well as in the visible range.

For quasi-monochromatic measurements the spectrum can be limited to one line with just a simple filter technique. Furthermore the single lines have a high irradi-
ance and high-resolution measurements can be performed with conventional techniques.

Heraeus St-series mercury lamps are stabilised medium pressure lamps especially developed for analytical applications. They are used in photometers, polarimeters, fluorimeters and other equipment. The emission lines have narrow bands, virtually monochromatic spectrum at constant, well reproducible wavelengths. Consequent-
ly, they are particularly suitable for absorption measurements.
St-Series Mercury Lamps from Heraeus Noblelight

St-series mercury lamps are stabilised by the geometry of the gas discharge, resulting in an accurate position of the arc. As a result, the noise is very low - in the order of 0.1%. The most favourable values of drift and noise are achieved when only the middle part of the light arc is used as the light source.

St 46 mercury lamp line spectrum The guaranteed operating life for all St-lamp types is 1000 hrs with a reduc-
tion of the output of max. 50%. The normal useful operating life can be be-
tween 2000 to 4000 hrs.

St-lamps should be mounted with the base down and an inclination from the vertical of less than ±20°. In DC operation, the lamp must be connected so that the anode is at the bottom.

UV radiation damages skin and eyes. Always wear protective glasses, gloves and clothing.

Right image: St 46 mercury lamp line spectrum

 Lamp Type: St 46
Click here for enlarged image: St 46 mercury lamp
St 75
Click here for enlarged image: St 75 mercury lamp
Part No.: 56001333 56001171
Total Length (mm): 90 120
Light Center (mm): 43.5 ± 0.5 51.0 ± 0.5
Arc Length (mm): 11.5 20
Outer Bulb Ø (mm): 19 n/a
Base: Noval EF 80 Ba 20 d
Type of Current: DC DC
Wattage (W): 33 80
Ignition Voltage (V): 330 800
Lamp Voltage (V): 55 ± 5 88 ± 7
Lamp Current (A): 0.6 0.9
Luminous Intensity (cd): 95 220
Luminance (cd cm-2): 380 530
Radiance UV-A (mW sr/cm-2): 510 680
Radiance UV-B (mW sr/cm-2): 480 840

Heraeus Noblelight St-series mercury lamps are used as light source in several polarimeter models from Perkin Elmer. The following instruments utilize St 46 or St 75 mercury lamps:

Instrument-/Model-Type Heraeus Lamp Type
Perkin Elmer 141 St 75
Perkin Elmer 141MC St 75
Perkin Elmer 241 St 75
Perkin Elmer 241C St 75
Perkin Elmer 243 St 75
Perkin Elmer 341 St 46
Perkin Elmer 343 St 46

 Type Part No. Price 
St 46 56001333 561.00
St 75 56001171 636.00
All prices are in Euros per piece and are subject to change without further notice.

For further questions, please don't hesitate to contact us.

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Last update November 2017 · Copyright © msscientific Chromatographie-Handel GmbH · All rights reserved