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HG2 Low-Pressure Mercury Lamps from Heraeus Noblelight

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HG2 low-pressure mercury lamps from Heraeus Noblelight have a highly stable output predominantly at the 253.7 nm mercury line. When used with the Heraeus C430 power supply, the line output is much higher than and the stability comparable to that of a deuterium lamp. Other lines, which total 20% of the output, are at 313, 365, 404 and 435 nm. The lamp has a strike voltage requirement of just 21 V and a typical power requirement of 2.7 W, making this lamp especially suitable for use in portable instruments. HG2 mercury lamps can be used for applications such as mercury analyzers, fluorimetry, pollution analyzers, fixed wavelength detectors and calibration equipment. In particular, they are utilized in the Fixed Wavelength Monitor from Knauer (A0315) and in the Merlin from PS Analytical. It is advisable that the lamp should be mounted with the base and lead uppermost. Any clamp around the lamp envelope should be at the base end of the lamp. The clamp should be of low thermal capacity and poor thermal conduction. In case the mount is such that it cools the lamp significantly, mercury can be condensed in this region, adversely affecting the performance of the lamp. The HG2 is temperature sensitive and must be protected from draughts if optimum stability is to be achieved. Left image: Spectrum/Output

TECHNICAL INFORMATION Anode strike voltage 21 V DC max. / 18 V DC typical Anode running voltage at 150 mA 8 - 14 V DC Anode current 100 - 300 mA (150 mA recommended) Filament strike voltage 5 - 7 V DC Filament running voltage 3 - 4.5 V DC Filament running voltage at 150 mA anode current 3.5 V DC nominal Filament strike current 400 mA at 6 V DC nominal Filament running current 250 mA at 3.5 V DC nominal Power dissipation at strike 8.7 W max. Power dissipation durring run 2.7 W typical Warm up time 15 - 30 min Output at lamp surface at 253.7 nm with 150 mA anode current 15 mW/cm2 Output at lamp surface at 253.7 nm with 300 mA anode current 30 mW/cm2 Output at lamp surface at 365 nm with 150 mA anode current 1.0 mW/cm2 Output at lamp surface at 365 nm with 300 mA anode current 2.4 mW/cm2 Noise at 253.7 nm and constant temperature 1 - 2 % typical Drift/hour (initial) <5 % Lifetime 2000 hrs min. / 4000 hrs typical Center of gas discharge position 35 - 39 mm above base line Output viewing angle 140° cone angle about lamp center line Temperature envelope optimum 55 - 60° C, fluctuation 1° C Right image: HG2 low-pressure mercury lamp dimensions ORDER INFORMATION  Type/Description Part No. Price  HG2 low pressure mercury lamp 80017485 644.00 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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